[Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "10.10"] [White "Praggnanandhaa R"] [Black "Bjerre, Jonas Buhl"] [Result "1-0"] [ECO "E46"] [WhiteElo "2608"] [BlackElo "2542"] [Annotator "TA"] [PlyCount "87"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,87,0,3,0,0,0,0,0,0,0,58,0,0,-8,17,18,15,15,21,0,6,-10,9,0,18,-6,-6, -21,0,0,0,-22,18,22,30,-38,-47,-41,16,0,0,0,0,0,2,0,337,308,348,79,85,121,269, 254,267,260,249,204,358,355,292,235,254,235,225,264,262,239,251,264,262,266, 204,163,150,111,558,559,561,553]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 c5 6. a3 {E46: Nimzo-Indian: Rubinstein: 4 e3 0-0 5 Ne2 without early Bd3.} Bxc3 7. Bxc3 Ne4 8. Ne2 {The position is equal.} b6 9. d5 Ba6 {[#]} (9... Bb7 $11) 10. Qc2 $5 $146 {[%mdl 8] New and interesting.} (10. b3 $1 $14) ({ Predecessor:} 10. Qd3 exd5 11. Qxd5 Qe7 12. g3 Nc6 13. Bg2 Rae8 14. O-O Nxc3 15. Nxc3 Na5 16. Nb5 {1-0 (39) Bluebaum,M (2660)-Swiercz,D (2649) chess24.com INT 2020}) 10... exd5 $11 11. cxd5 Re8 12. Ng3 Nxc3 13. Bxa6 Nxa6 14. Qxc3 Nc7 15. Rd1 Qg5 16. Qd3 Qg6 (16... Qf6 {with more complications.} 17. Qb3 b5 18. O-O d6 19. e4 a5) 17. Qxg6 hxg6 18. Ke2 Re5 19. e4 Rae8 20. Kd2 {White wants to play f4.} g5 21. f3 Nb5 22. h4 ({White should play} 22. Nf5 $11) 22... Nd6 $15 23. Kc1 g6 (23... a5 $15) 24. h5 f5 25. hxg6 {Strongly threatening Rh7.} fxe4 26. Rh7 R8e7 27. Rdh1 Rxh7 {[%mdl 8192]} (27... exf3 $1 $11 {and Black is okay.} 28. gxf3 Ne8) 28. Rxh7 $11 {[%mdl 4096] Endgame KRN-KRN} e3 {White should prevent ...e2.} 29. Kd1 (29. Rxd7 $18 e2 30. Nxe2 $1 {[%mdl 512]} Rxe2 31. Rxd6) 29... Rxd5+ $16 30. Ke2 Nc4 (30... g4 $16 {was called for.}) 31. Ne4 $18 {Threatening mate with Nf6+.} Rf5 32. Rxd7 Rf8 33. Nxg5 Ne5 (33... Rf6 34. f4 (34. Rxa7 Rxg6 35. f4 Rd6 $16) 34... Rxg6) 34. Rxa7 Nxg6 35. Ne6 Rf6 36. Ra8+ Kh7 {[#]} 37. Ng5+ Kh6 38. Ne4 Nf4+ 39. Kxe3 Nxg2+ 40. Kf2 Rg6 41. Rf8 { aiming for Ng3.} Kg7 42. Rf5 {Ng3 is the strong threat.} c4 $2 {[%mdl 8192]} ( 42... Nh4 $16 43. Rf4 Rg2+ 44. Kf1 Ng6 45. Kxg2 Nxf4+ 46. Kg3 Nd3) 43. Ng3 Nh4 44. Rf4 {[%mdl 64] Double Attack. Weighted Error Value: White=0.26/Black=0.53} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "10.9"] [White "Mendonca, Leon Luke"] [Black "Lei, Tingjie"] [Result "1/2-1/2"] [ECO "D38"] [WhiteElo "2549"] [BlackElo "2505"] [Annotator "TA"] [PlyCount "74"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,74,18,16,13,21,25,25,27,11,16,41,39,29,35,22,18,23,19,19,22,16,6,29,0, 16,-10,0,-10,0,-12,8,0,6,3,22,22,29,0,16,12,10,9,0,0,22,6,39,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. Nc3 Bb4 5. cxd5 exd5 6. Bf4 {D38: Queen's Gambit Declined: Ragozin Defence (4 Nf3 Bb4).} c6 7. e3 Bf5 8. Be2 {White has an edge.} Nbd7 9. O-O O-O 10. Qb3 Bxc3 11. bxc3 {[#]} b5 $146 ({Predecessor:} 11... b6 12. h3 c5 13. c4 dxc4 14. Bxc4 cxd4 15. Nxd4 Nc5 16. Qa3 Bg6 17. Rfd1 Qd7 {0-1 (71) Philipp,R-Dachner,M Germany 2002}) 12. a4 a6 13. Ne5 Nxe5 14. Bxe5 Nd7 15. Bf4 Re8 16. Qb4 {[%CAl Ra4b5]} Nb6 17. a5 Nc4 18. Bxc4 dxc4 19. Rfe1 Re6 20. f3 Bd3 21. e4 Qd7 22. Qc5 Rae8 23. Kf2 h6 24. h3 Rf6 25. Be5 Rfe6 26. Bf4 Qd8 27. g4 Qh4+ 28. Kg2 (28. Bg3 $5 {[%CAl Rg3h4]} Qf6 29. Kg2 $14) 28... Bxe4 {The position is equal.} 29. Rxe4 Rxe4 30. fxe4 Rxe4 { ( -> ...Re2+)} 31. Bg3 Re2+ 32. Kf3 Re3+ $1 {[%mdl 64] [#] Decoy} 33. Kxe3 Qxg3+ 34. Ke2 Qg2+ 35. Ke3 Qg3+ 36. Ke2 Qg2+ 37. Ke3 Qg3+ {Weighted Error Value: White=0.06/Black=0.07} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "10.8"] [White "Zhu, Jiner"] [Black "Abdumalik, Zhansaya"] [Result "0-1"] [ECO "C67"] [WhiteElo "2462"] [BlackElo "2472"] [Annotator "TA"] [PlyCount "58"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 18,58,17,15,11,16,26,38,58,6,63,30,118,21,20,30,24,27,58,22,53,-41,10, 11,12,-35,0,0,0,0,-4,-62,-82,-80,-38,-451,-454,-454,-450,-445,-377,-400,-378]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. Re1 Nd6 6. Nxe5 Nxe5 7. Rxe5+ Be7 8. Bf1 O-O 9. d4 Bf6 10. Re1 Re8 {C67: Ruy Lopez: Berlin Defence: 4 0-0 Nxe4.} 11. c3 b6 12. Bf4 Bb7 {[#] White is slightly better.} 13. Na3 $146 ({White should play} 13. Bxd6 $14 cxd6 14. Rxe8+ Qxe8 15. Na3) ({Predecessor:} 13. Nd2 Rxe1 14. Qxe1 Qe8 15. Bxd6 cxd6 16. Qxe8+ Rxe8 17. Nc4 Re6 18. Rd1 d5 19. Ne3 { 0-1 (52) Hahabis,N (1795)-Delithanasis,D (1906) Athens 2019}) 13... Ne4 (13... Rxe1 $11 14. Qxe1 Nf5) 14. Bd3 g6 {[#]} (14... Bh4 $11 15. g3 Ng5 16. Rxe8+ Qxe8 17. Bxg5 (17. Bxc7 Nf3+ 18. Kg2 Nd2+ 19. d5 Bxd5+ 20. Kg1 Bg5 $19) 17... Bxg5) 15. Nc4 ({Better is} 15. Nb5 $1 $16 Nd6 16. Nxd6 (16. Bxd6 Rxe1+ 17. Qxe1 cxd6 $16) 16... cxd6 17. Bxd6) 15... d5 16. Ne5 {[%CAl Bc4e5,Be5g4,Bg4h6][%mdl 32]} Bg7 17. Ng4 Qd7 18. Nh6+ Kh8 19. Qf3 (19. f3 $14 Nd6 20. Qd2) 19... f5 ( 19... c5 $15) 20. Qh3 $11 c5 21. dxc5 bxc5 22. Rad1 d4 23. f3 Nf6 24. Be5 {[#]} (24. c4 $11) 24... Rxe5 $1 $15 25. Rxe5 {[%CAl Rh6f5]} Nd5 26. Re2 {[%mdl 8192] White does not recover from this.} (26. Bxf5 $15 gxf5 27. Rxf5) 26... Nf4 $19 27. Qh4 Nxe2+ 28. Bxe2 {If White can now play cxd4 this consolidates a bit.} Re8 29. Bf1 Qe7 {Weighted Error Value: White=0.67/Black=0.28} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "10.7"] [White "Nihal Sarin"] [Black "Shuvalova, Polina"] [Result "1/2-1/2"] [ECO "A14"] [WhiteElo "2620"] [BlackElo "2489"] [Annotator "TA"] [PlyCount "85"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 20,85,25,6,18,0,18,18,18,11,17,16,9,18,38,4,4,3,5,9,10,12,11,3,8,0,0,0, 21,37,22,22,68,16,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0]} 1. b3 Nf6 2. Bb2 e6 3. Nf3 Be7 4. g3 O-O 5. Bg2 d5 6. c4 b6 7. cxd5 Nxd5 8. O-O Bb7 9. d4 Nd7 10. Nbd2 c5 11. Rc1 Rc8 {A14: English Opening: 1... e6 with b3 by White.} 12. dxc5 Bxc5 {[#]} 13. Nc4 $146 ({Predecessor:} 13. Ne4 Be7 14. Qd4 N7f6 15. Ne5 Nxe4 16. Qxe4 Bf6 17. Qa4 a6 18. Rfd1 b5 19. Qg4 { 1/2-1/2 (45) Oparin,G (2652)-Smirnov,P (2544) chess.com INT 2020}) 13... b5 14. Nce5 Nxe5 15. Nxe5 Qe7 16. Nd3 Ba3 17. Qd2 (17. Bxa3 {with more complications.} Qxa3 18. Qd2 h6 19. Rfd1 Qe7 20. Bxd5 Bxd5 21. f3) 17... Bxb2 18. Qxb2 Nb4 19. Nxb4 {[#] Threatens to win with Nc6.} Bxg2 20. Kxg2 {Strongly threatening Nc6.} Qxb4 21. Qe5 h6 22. Rxc8 Rxc8 $11 {[%mdl 4096] Endgame KQR-KQR} 23. Rd1 Qa3 24. Qxb5 Qxa2 25. Rd7 a6 26. Qb7 ({White should try} 26. Qd3 $1 $14) 26... Rf8 { The position is equal.} 27. e3 a5 28. Rd4 Qc2 29. Rc4 Qd1 30. h4 Rd8 31. Rc5 a4 32. bxa4 Qxa4 33. Rc7 Rf8 34. Rd7 Qg4 35. e4 h5 36. Rc7 Qe2 37. Rc3 g6 38. Rc8 Rxc8 39. Qxc8+ Kg7 40. Qc3+ Kg8 41. Qc8+ Kg7 42. Qc3+ Kg8 43. Qc8+ {Weighted Error Value: White=0.07/Black=0.02} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "10.6"] [White "Yip, Carissa"] [Black "Mammadzada, Gunay"] [Result "1/2-1/2"] [ECO "A11"] [WhiteElo "2430"] [BlackElo "2443"] [Annotator "TA"] [PlyCount "128"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 11,128,6,18,9,25,0,5,7,34,0,0,0,26,16,18,17,39,23,58,50,89,81,175,176, 170,166,163,172,187,168,185,125,114,114,179,171,216,207,246,198,194,84,202,196, 235,150,160,150,160,155,216,207,216,215,209,220,220,220,220,210,205,205,205, 213,209,198,198,205,198,177,160,143,143,74,81,97,98,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 d5 2. g3 c6 3. Bg2 Bg4 4. c4 e6 5. O-O Nf6 6. cxd5 exd5 7. h3 {A11: English Opening: 1... c6.} Bh5 8. d3 Nbd7 9. Qc2 Be7 10. Nc3 Bxf3 11. Bxf3 {[#]} Ne5 $146 ({ Predecessor:} 11... d4 12. Ne4 O-O 13. Nxf6+ Bxf6 14. Bd2 Re8 15. Rad1 Qe7 16. Rfe1 Qe6 17. Bg4 Qd5 18. Qb3 Qxb3 19. axb3 Nb6 20. Ba5 {1/2-1/2 (20) Radnai,A (2266)-Orso,M (2290) Hungary 2017}) 12. Bg2 d4 13. Ne4 Nd5 14. a3 O-O 15. b4 a5 16. Bb2 axb4 (16... Nc7 $16) 17. Bxd4 $18 Ng6 18. axb4 Rxa1 19. Rxa1 Ndf4 20. Bc5 (20. gxf4 $6 Qxd4 21. Qd1 Rd8 $14) 20... f5 21. Nc3 (21. gxf4 $18 fxe4 22. Bxe7 (22. dxe4 Bxc5 23. bxc5 Nxf4 $14) 22... Qxe7 23. e3 (23. dxe4 Nxf4 24. Bf1 Qg5+ 25. Kh1 Qh4 $11)) 21... Nxg2 $16 22. Kxg2 Kh8 {[#]} (22... h5 $16 { was necessary.}) 23. e3 $1 $18 Ne5 24. d4 Nd7 25. Bxe7 Qxe7 26. Qb3 (26. b5 $18 {is more deadly.}) 26... h5 (26... g5 $16) 27. h4 Nb6 28. Ne2 Nd5 29. b5 Qe4+ 30. Kg1 Qf3 {[#]} (30... cxb5 $16 {keeps fighting.} 31. Qxb5 Kh7) 31. bxc6 $1 bxc6 32. Qd1 Rb8 {White must now prevent ...Rb2.} 33. Nf4 Qxd1+ 34. Rxd1 Nxf4 35. gxf4 {[%mdl 4096] Endgame KR-KR} ({Resist} 35. exf4 $6 Rd8 $16) 35... Kh7 36. Rc1 Rb6 37. Rc5 Kg6 38. Kg2 Kf6 39. Kf3 g6 40. Kg3 Ra6 41. f3 Kg7 42. e4 ({ White should play} 42. Rc4) 42... fxe4 $16 43. fxe4 Ra4 44. d5 ({White should try} 44. f5 $16) 44... cxd5 $11 {The position is equal.} 45. exd5 Rd4 46. Kf3 Kf6 47. Rc6+ Kf5 48. d6 Rxf4+ 49. Ke3 {Threatening mate with Rc5+.} Re4+ 50. Kd3 Re8 (50... Re1 {with more complications.} 51. Rc5+ Ke6 52. Rg5 Rd1+ 53. Ke4 Re1+) 51. Kd4 Ke6 52. d7+ Kxd7 53. Rxg6 Ra8 54. Rg7+ Ke6 55. Rg6+ Kf7 56. Rc6 Ra4+ 57. Rc4 Rxc4+ 58. Kxc4 {KP-KP} Kf6 59. Kd4 Kf5 60. Ke3 Kg4 61. Kf2 Kxh4 62. Kg2 Kg4 63. Kh2 h4 64. Kg2 h3+ {Black escapes into a draw. Weighted Error Value: White=0.14/Black=0.12} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "10.5"] [White "Abdusattorov, Nodirbek"] [Black "Saduakassova, Dinara"] [Result "1-0"] [ECO "E20"] [WhiteElo "2634"] [BlackElo "2500"] [Annotator "TA"] [PlyCount "59"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 16,59,0,-8,0,0,0,0,4,0,2,0,0,0,63,59,71,75,85,64,214,219,251,224,252, 279,337,317,285,268,383,376,348,154,417,406,504,498,875,701,29995,29996,29996, 29997,29997,29998]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. g3 O-O 5. Bg2 d5 6. Nf3 dxc4 7. a3 Bxc3+ 8. bxc3 c5 9. O-O Bd7 {E20: Nimzo-Indian: 4 g3 and 4 f3.} 10. Ne5 Bc6 11. Nxc6 ({Don't go for} 11. Nxc4 $2 Bxg2 12. Re1 Bd5 $19) 11... Nxc6 { The position is equal.} 12. dxc5 Qa5 {[#]} 13. Bxc6 $5 $146 {[%mdl 8] An interesting novelty.} ({Predecessor:} 13. Rb1 Rad8 14. Qc2 Rd7 15. a4 Qxc5 16. Qa2 Rc8 17. Ba3 Qe5 18. Qxc4 Ne7 19. Qb5 Qxb5 20. Rxb5 {0-1 (49) Petkov,V (2510)-Parligras,M (2623) Kragujevac 2018}) 13... bxc6 14. Qd4 Rfd8 (14... Qa4 $11) 15. Qxc4 $14 Rd5 16. Be3 Rad8 17. f3 Nd7 ({Better is} 17... h6 $14) 18. Qb4 $18 Qa6 19. c4 Re5 20. Qc3 f6 21. Rfd1 Qc8 22. Rab1 Nf8 (22... Rf8 { was worth a try.} 23. g4 Rf7) 23. Rxd8 Qxd8 24. Bf4 (24. h4 $18 {is more deadly.}) 24... Rxc5 $2 {[#]} (24... Rxe2 $16 {was called for.} 25. Bd6 Nd7) 25. Rb8 Qd1+ 26. Kf2 {And now Qb4! would win.} a5 (26... Rf5 $142 27. Qe3 Qd7) 27. Qd3 Qh1 {[#]} 28. Rxf8+ $1 {[%mdl 512] White mates.} Kxf8 29. Qd8+ Kf7 30. Qd7+ {White took control after the opening. Weighted Error Value: White=0.10/ Black=1.02} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "10.4"] [White "Murzin, Volodar"] [Black "Yoo, Christopher Woojin"] [Result "1-0"] [ECO "C00"] [WhiteElo "2502"] [BlackElo "2457"] [Annotator "TA"] [PlyCount "45"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 11,45,38,57,38,48,28,129,55,55,37,118,99,347,335,329,329,329,325,324, 331,329,335,427,420,481,477,475,471,515,416,492,418,29994,29995,29995,29996]} 1. e4 e6 2. d3 d5 3. Nd2 Nf6 4. Ngf3 Nc6 5. c3 dxe4 6. dxe4 Bc5 7. Be2 { C00: French: Unusual White 2nd moves.} O-O 8. O-O Qe7 {[#]} (8... e5 $11 { keeps the balance.}) 9. b4 (9. e5 $1 $16 {[%CAl Re5f6]} Ng4 10. b4) 9... Bd6 $14 10. Qc2 {[#]} Nd7 $146 (10... e5 $14) ({Predecessor:} 10... Bf4 11. a4 Rd8 12. Ba3 Qe8 13. Nc4 b6 14. b5 Ne7 15. e5 Nfd5 16. g3 Bh6 {1/2-1/2 (55) Bodrozic,T (2056)-Golf,E (2195) Baden 2011}) 11. Nc4 $16 Nde5 $2 {Loses the game.} (11... a5 $16 {was worth a try.}) 12. Ncxe5 Nxe5 13. Nxe5 Bxe5 14. f4 Bf6 {[#]} 15. e5 $1 Bh4 16. g3 f6 17. gxh4 fxe5 18. fxe5 {And now Bg5 would win.} Rxf1+ 19. Bxf1 Qxh4 20. Qf2 Qg4+ 21. Qg3 Qd1 {[#]} (21... Qxg3+ $18 22. hxg3 Bd7) 22. Bh6 $1 {[%csl Gh6][%CAl Rg3g7][%mdl 576] Discovered Attack} Qd7 { [#]} 23. Rd1 $3 {[%mdl 512] Weighted Error Value: White=0.23/Black=1.07} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "10.3"] [White "Khademalsharieh, Sarasadat"] [Black "Gukesh D"] [Result "0-1"] [ECO "D36"] [WhiteElo "2494"] [BlackElo "2578"] [Annotator "TA"] [PlyCount "92"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 22,92,6,0,12,13,16,0,32,31,22,29,13,27,77,22,14,-6,-13,-10,-6,-13,-8, -12,-4,-20,-35,-81,-90,-96,-98,-91,-99,-94,-102,-106,-96,-106,-104,-106,-101, -182,-114,-128,-125,-128,-108,-156,-156,-164,-164,-170,-160,-238,-226,-229, -220,-238,-239,-222,-230,-294,-299,-274,-283,-481,-456,-558,-547,-552,-530, -514,-463]} 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 Be7 6. e3 O-O 7. Bd3 Nbd7 {[%CAl Bb8d7,Bd7f8,Bf8e6][%mdl 32]} 8. Nge2 c6 9. Qc2 Re8 10. O-O Nf8 11. f3 g6 $1 {[%mdl 4] is currently scoring better than 11...Be6.} 12. Rad1 Ne6 {D36: Queen's Gambit Declined: Exchange Variation: Main line (5 Bg5 c6 6 Qc2).} 13. Bh4 a6 14. Kh1 {[#]} Qc7 $146 {The position is equal.} ({Predecessor:} 14... b5 15. Bf2 Bb7 16. e4 Rc8 17. e5 Nh5 18. Qd2 c5 19. dxc5 Bxc5 20. Bxc5 Nxc5 {0-1 (59) Paul,J (2364)-Lubbe,N (2431) Magdeburg 2019}) 15. Bg3 Bd6 16. Qc1 Bxg3 17. Nxg3 b6 18. e4 ({White should try} 18. f4 $16) 18... Qf4 $11 19. Nce2 Qxc1 20. Rxc1 Bb7 21. e5 Nd7 22. f4 c5 23. h4 cxd4 24. Kg1 Ndc5 25. Rfd1 Rac8 26. f5 Nxd3 27. Rxc8 Bxc8 28. Rxd3 Nc5 29. Rxd4 Rxe5 30. Nf4 Bb7 31. a4 ( 31. fxg6 $17 fxg6 32. Kf2) 31... Kg7 (31... gxf5 32. Rb4 $17) ({Better is} 31... Re1+ $1 $19 32. Nf1 gxf5 33. Nxd5 Bxd5 34. Rxd5 Nxa4) 32. Rb4 Nd7 33. a5 b5 34. Rb3 Nc5 (34... gxf5 35. Rc3 $16) 35. Rc3 d4 36. Rc1 d3 {aiming for ... d2.} 37. Kf2 (37. Rd1 $17) 37... d2 $19 38. Rd1 {[#]} Nb3 ({Less strong is} 38... gxf5 39. Rxd2 Kf8 40. b4 $15) 39. fxg6 hxg6 ({But not} 39... fxg6 40. Nf1 $17) 40. Nf1 {[#]} Re4 $1 {[%CAl Re4f4]} ({Much less strong is} 40... Nxa5 41. Nxd2 Re7 42. Rc1 $17) 41. Ne2 Rxh4 42. Nxd2 Nxa5 43. Nf1 $2 (43. b3) 43... Rb4 {Black is clearly winning.} 44. Rd2 Nc4 45. Rd7 Bc8 46. Rc7 Bg4 {Weighted Error Value: White=0.26/Black=0.06} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "10.2"] [White "Liang, Awonder"] [Black "Badelka, Olga"] [Result "1-0"] [ECO "B23"] [WhiteElo "2592"] [BlackElo "2418"] [Annotator "TA"] [PlyCount "127"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,127,-10,-12,-2,0,-14,-3,-10,-8,-11,-11,-9,-13,-19,21,-10,0,0,0,-12,20, 10,19,-30,-35,-46,-45,-97,-97,-172,-138,-258,-267,-265,-281,-310,-338,-336, -318,-317,-311,-306,-306,-409,-427,-413,-404,-414,-408,-398,-416,-341,-325, -325,-325,-325,-325,-325,-324,-324,-324,-338,-327,-331,-341,-339,-273,-274, -270,-269,-254,-256,-256,-254,-254,-227,-114,-114,10,14,41,48,49,12,49,0,0,0, 10,0,0,0,0,0,8,18,13,0,0,0,0,0,0,0,0,0,0,0,29,0,0,0,0,0,0,0,57,42,29990,29991] } 1. e4 c5 2. Nc3 d6 3. Bb5+ Bd7 4. a4 Nf6 5. f4 e6 6. Nf3 {B23: Closed Sicilian: Lines without g3.} a6 7. Bxd7+ Qxd7 8. O-O {The position is equal.} Nc6 9. d3 Be7 10. Qe1 {[#]} O-O $146 ({Predecessor:} 10... Qc7 11. h3 O-O 12. Qf2 Rab8 13. e5 Nd5 14. Ne4 dxe5 15. fxe5 Nd4 16. c4 Nb4 17. Nxd4 cxd4 { 1-0 (39) Petraki,M (2069)-Nikolaidou,E (1817) Athens 2008}) 11. Qg3 Kh8 12. e5 dxe5 13. fxe5 Nd5 14. Ne4 Nd4 15. Nxd4 cxd4 16. Bg5 f6 17. exf6 gxf6 18. Bh6 ( 18. Bd2 $15) 18... Rg8 $17 19. Qh3 (19. Qf3 $17 {keeps fighting.}) 19... Rg6 20. Bf4 (20. Rf3 $17 {was called for.}) 20... Rag8 $19 21. Bg3 Ne3 22. Rf2 Ng4 23. Rf4 {[#]} Rh6 24. Qxg4 Rxg4 25. Rxg4 Rg6 26. Rf4 f5 27. Nd2 Bg5 28. Nc4 Bxf4 29. Bxf4 Qd5 {[%csl Gg6][%CAl Rd5g2]} 30. g3 Qf3 {Hoping for ...Qxf4.} 31. Rf1 Qe2 32. Rf2 Qd1+ 33. Kg2 Kg8 34. Ne5 Rg7 35. Nf3 Rd7 36. Rd2 Qa1 37. b3 Qc3 38. Re2 Qc6 39. Kf2 {If White can now play Ne5 this consolidates a bit.} Re7 40. Be5 b5 41. axb5 axb5 42. Bxd4 e5 (42... b4 $19 43. Bf6 Re8) 43. Bxe5 $17 Rxe5 44. Nxe5 {[%mdl 4096] Endgame KQ-KRN} Qh1 45. Nf3 Qc1 46. d4 Qa3 47. Kg2 Qd6 48. Rd2 Qd5 49. Re2 b4 50. Re5 Qc6 51. Rc5 Qe6 {Threatens to win with ... Qe2+.} 52. Kf2 Qe4 53. d5 f4 {aiming for ...Qe3+.} 54. gxf4 Qxf4 55. Rc4 Qd6 56. Rd4 Kf7 57. Ke3 Ke8 58. h4 Kd8 59. Rd3 Qc5+ 60. Kd2 Qd6 61. Kc1 Qf4+ 62. Kb1 Qd6 (62... Kd7 $11) 63. Ng5 {White threatens Nf7+ and mate.} h5 $2 { [%mdl 8192] [#]} (63... Kd7 $14) 64. Nf7+ {[%mdl 64] Double Attack. What a bad dream for Black. Weighted Error Value: White=0.12/Black=0.26} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "10.1"] [White "Keymer, Vincent"] [Black "Salimova, Nurgyul"] [Result "1/2-1/2"] [ECO "A11"] [WhiteElo "2591"] [BlackElo "2395"] [Annotator "TA"] [PlyCount "140"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 11,140,11,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-21,-37,22,19,22, 22,24,27,8,10,97,33,39,27,23,7,6,8,7,-42,-22,-46,-39,-112,-56,-63,-52,-244,0,0, 12,12,10,9,13,11,47,47,53,50,49,50,57,28,43,39,55,50,50,54,54,54,54,44,125,30, 30,22,24,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 d5 2. e3 Nf6 3. c4 e6 4. Nc3 Bd6 5. b3 O-O 6. Bb2 c6 7. h3 {A11: English Opening: 1...c6.} Re8 8. d4 Nbd7 9. Bd3 e5 10. dxe5 Nxe5 11. cxd5 Nxf3+ 12. Qxf3 Be5 13. O-O Qa5 14. Rfc1 ({Reject} 14. dxc6 Bxc3 15. cxb7 Bxb7 $1 $17) 14... Nxd5 15. Na4 Bxb2 16. Nxb2 Be6 {[#]} 17. Bc4 $146 ({Predecessor:} 17. Na4 Nb4 18. Rc5 Qc7 19. Bxh7+ Kxh7 20. Qe4+ Kg8 21. Qxb4 Qe7 22. Qc3 Bd5 23. Qc1 b5 24. Nb2 Rad8 25. f3 f5 26. Rc2 {1/2-1/2 (26) Cvetnic,V (2263)-Stone,G (2331) ICCF email 2015}) 17... Rad8 18. Nd3 b5 (18... Nc3 $15 19. Nb2 Bd5 20. Bxd5 Rxd5) 19. Bxd5 $11 Bxd5 20. Qe2 Rd6 21. Nf4 Be4 22. Rd1 Rf6 (22... Red8 $11) 23. Qg4 (23. Qd2 $16 Qb6 24. Qd7) 23... Bf5 $14 24. Qg3 h6 25. a3 Qc3 26. b4 a5 27. bxa5 Qxa5 28. Rdc1 Be4 29. Rc5 {[#]} (29. f3 $15 Bd5 30. Nxd5 cxd5 31. Rc5) 29... Qd2 ({Black should play} 29... Qa7 $1 $17 {[%CAl Ra7c5]} 30. Rcc1 c5) 30. Rac1 Kh7 31. R5c3 $2 (31. Qg4 $1 $15) 31... Re5 $2 ({Black should try} 31... g5 $19 32. Nh5 Rf5) 32. f3 $11 Bd5 (32... Bg6 {is interesting.} 33. Qf2 Qd7 34. h4 Rd6 35. Qg3 Qa7) 33. Qf2 Qxf2+ 34. Kxf2 Bc4 35. Rd1 c5 36. a4 Ra6 37. axb5 Ra2+ 38. Kg3 Rg5+ 39. Kh2 Bxb5 40. h4 Re5 41. Kg3 g5 42. hxg5 hxg5 43. Nd5 Bf1 44. Nf6+ Kg6 {[#]} (44... Kg7 $1 $14 45. Ng4 Rxg2+ 46. Kh3 Rc2+ 47. Rxf1 Rxc3 48. Nxe5 Rxe3) 45. Rxf1 (45. Ng4 $1 $16 { [%CAl Rg4e5]} Rxg2+ 46. Kh3 Rxg4+ 47. Kxg4) 45... Kxf6 $16 {[%mdl 4096] Endgame KRR-KRR} 46. e4 Ke6 47. Rb1 f5 {The position is equal.} 48. Rb6+ Kf7 49. Rb7+ Kf6 50. Rb6+ Kf7 51. Rd3 fxe4 52. Rd7+ Re7 53. Rxe7+ Kxe7 54. fxe4 $11 {KR-KR} c4 55. Rc6 Rc2 56. Kf3 Kd7 57. Rc5 g4+ {[%mdl 64] Decoy} 58. Kxg4 Rxg2+ 59. Kf5 Rc2 60. Rd5+ Ke7 61. Ke5 c3 62. Rd3 Rc1 63. Rh3 c2 {Threatens to win with ...Rf1.} 64. Rh2 Kd7 65. Rg2 Kc6 66. Ke6 Kc5 67. e5 Kb4 68. Ke7 Re1 69. Rxc2 Rxe5+ 70. Kd6 Rh5 {Weighted Error Value: White=0.14/Black=0.14} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "9.10"] [White "Badelka, Olga"] [Black "Salimova, Nurgyul"] [Result "0-1"] [ECO "E06"] [WhiteElo "2418"] [BlackElo "2395"] [Annotator "TA"] [PlyCount "112"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 12,112,0,1,18,26,37,-16,-4,-9,0,-14,-18,-127,-60,-62,-62,-81,-41,-199, -35,-28,-20,-148,-169,-135,-127,-261,-145,-138,-144,-165,-134,-157,-148,-123,0, 0,0,-22,-24,-20,-13,-59,0,0,0,-107,-59,-195,-169,-181,-171,-241,-232,-266,-175, -397,-395,-403,-392,-392,-309,-441,-324,-299,-339,-502,-513,-502,-508,-482, -417,-759,-750,-633,-602,-919,-568,-516,-511,-1037,-1044,-1225,-957,-776,-741, -602,-614,-6070,-5106,-5493,-5285,-6418,-6418,-29979,-29976,-29986,-29985, -29987,-29988,-29991,-29992]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. Qc2 c5 7. dxc5 Na6 {[%CAl Bb8a6,Ba6c5,Bc5e4][%mdl 32] E06: Closed Catalan: Early deviations.} 8. O-O Nxc5 9. b4 (9. Nc3 $14) 9... Nce4 {The position is equal.} 10. a3 a5 {[#]} 11. b5 $146 ({Predecessor:} 11. bxa5 Qxa5 12. cxd5 exd5 13. Nbd2 Bd7 14. Nd4 Rfc8 15. Qd3 Rxc1 16. Rfxc1 Nxd2 17. Ra2 {0-1 (35) Trella, T (2375)-Wegerle,J (2407) Germany 2013}) 11... Bd7 12. cxd5 (12. Nbd2 $11) 12... exd5 (12... Rc8 $17 13. Qb2 Nxd5) 13. a4 Rc8 14. Qd1 Bc5 15. Ba3 $2 (15. Bb2 $1 $15) 15... Re8 $2 ({Black should play} 15... Nxf2 $1 $19 16. Rxf2 Be3 17. Bxf8 Kxf8) 16. Bxc5 $15 Rxc5 17. h3 (17. e3 $11 {remains equal.}) 17... Qc8 18. Kh2 h5 19. e3 (19. Qe1 $17) 19... Rc2 (19... h4 $1 $19 20. Nxh4 Rc2) 20. Nbd2 $17 h4 21. gxh4 {[#]} Qc7+ $1 22. Kg1 {[#]} Nc3 $1 {[%CAl Rc3d1][%mdl 512] } 23. Qe1 ({Don't blunder} 23. b6 $2 Qc8 $19) 23... Nfe4 (23... Nh5 $17 24. Nd4 Nf4 25. Nxc2 Nd3) 24. Nxe4 $11 Nxe4 25. Nd4 Rc4 26. Rc1 b6 27. Qd1 Rxc1 (27... Nc3 $15 28. Qd2 Rc8) 28. Qxc1 Qd6 29. Nc6 (29. Ne2 $11) 29... Qg6 {Strongly threatening ...Bxh3. Black continues to play with concentration.} 30. Kh1 ({ White should try} 30. Kh2 $1 $15) 30... Qh5 $36 {[%mdl 2048] Black is on the roll.} 31. Kh2 Qxh4 {White must now prevent ...Bxh3!} 32. Qe1 (32. Nd4 { was called for.}) 32... Qh6 $19 {And now ...Ng5 would win.} 33. f3 Nc5 34. Qg3 $2 (34. f4 {was forced.}) 34... Bxc6 35. bxc6 Qxc6 36. Rg1 Qf6 37. f4 (37. Rd1 $142) 37... Ne4 38. Bxe4 Rxe4 {[%mdl 4096] Endgame KQR-KQR} ({Not} 38... dxe4 39. Qg5 $17) 39. Kh1 (39. Qf3 $142) 39... Rxa4 40. Qg4 Ra1 41. Qc8+ Kh7 42. Qc2+ (42. Rxa1 $142 Qxa1+ 43. Kg2) 42... g6 43. Rxa1 Qxa1+ {KQ-KQ} 44. Kh2 Qf6 45. Qb3 Qe6 {Threatens to win with ...d4!} 46. Qc3 (46. Qa3 $142 a4 47. Qxa4) 46... a4 {[%CAl Ba5a4,Ba4a3,Ba3a2][%mdl 32]} 47. h4 Qf5 48. Kg3 b5 {[%CAl Bb6b5,Bb5b4][%mdl 32]} 49. Kf2 d4 {[%mdl 64] Deflection} 50. Qxd4 a3 51. Qa7 b4 52. Kg3 Qe6 53. e4 a2 {Black mates.} 54. f5 gxf5 55. exf5 Qe5+ 56. Kg4 Qg7+ { Weighted Error Value: White=0.70/Black=0.33} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "9.9"] [White "Gukesh D"] [Black "Liang, Awonder"] [Result "1-0"] [ECO "A50"] [WhiteElo "2578"] [BlackElo "2592"] [Annotator "TA"] [PlyCount "43"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 10,43,24,31,23,20,37,28,41,29,25,7,73,56,33,82,89,25,131,83,180,133,107, 71,453,441,423,419,522,545,533,536,1128,1137,1228,1223]} 1. d4 Nf6 2. c4 b6 3. Nc3 Bb7 4. Qc2 d5 5. cxd5 Nxd5 6. e4 Nxc3 {A50: Queen's Fianchetto Defence (1 d4 Nf6 2 c4 b6).} 7. bxc3 e5 8. Nf3 {8.Nf3 is better than 8.dxe5.} exd4 { White has an edge.} 9. Bc4 d3 10. Qb3 Qe7 {[#]} (10... Qf6 $1 $11 {keeps the balance.}) 11. Ng5 $1 $36 {[%CAl Rc4f7][%mdl 2048] [#] White has some pressure. } Nd7 $146 {White must now prevent ...0-0-0.} ({Predecessor:} 11... f6 12. Nf7 Qxe4+ 13. Be3 Bc5 14. O-O-O Bxe3+ 15. fxe3 Rf8 16. Rxd3 Nd7 17. Rhd1 Nc5 18. Bb5+ Bc6 19. Bxc6+ Qxc6 20. Rd8+ Rxd8 21. Rxd8+ Ke7 22. Qd1 Kxf7 {0-1 (22) Sanikidze,T (2507)-Moiseenko,V (2501) St Petersburg 2018}) 12. Bxf7+ Kd8 {[#]} 13. Be3 ({White should play} 13. O-O $1 $16) 13... h6 {[#]} ({But not} 13... Bxe4 $2 14. Nxe4 Qxe4 15. Bd5 $18) (13... Nc5 $1 $11 14. Ne6+ Qxe6 15. Bxe6 Nxb3 16. axb3 Bxe4) 14. Bd5 $1 Kc8 (14... Nc5 $16 15. Bxc5 Qxg5 16. Bxb7 Bxc5) 15. Nf7 Rh7 16. Rd1 Nf6 $2 {[%mdl 8192] A mistake that costs the game.} (16... g5 $16 {is a better chance.}) 17. Be6+ $18 Kb8 18. e5 Bc8 19. Bxc8 {White is clearly winning.} Kxc8 20. exf6 gxf6 {[#]} 21. Qd5 {[%mdl 64] Double Attack} Rb8 (21... Qxf7 22. Qxa8+) 22. Qf5+ {[%mdl 64] Double Attack. Weighted Error Value: White=0.16/Black=0.71} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "9.8"] [White "Yoo, Christopher Woojin"] [Black "Khademalsharieh, Sarasadat"] [Result "1/2-1/2"] [ECO "C44"] [WhiteElo "2457"] [BlackElo "2494"] [Annotator "TA"] [PlyCount "126"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,126,0,6,-20,-8,-35,-8,-8,-8,-11,-6,-23,-8,-27,-12,-4,0,0,-2,-9,4,-3,4, -5,-4,-4,-6,-8,-7,-15,-19,-59,-63,-44,-50,-43,-33,-37,-14,-14,-15,-15,-21,-10, -19,-40,-30,-52,-40,-14,-25,-77,-97,-290,0,-33,-37,-79,-78,-84,0,0,0,0,125,0,0, 0,127,110,352,348,330,0,0,0,0,0,11,0,0,0,0,0,35,14,56,71,48,8,8,0,63,36,39,-8, 15,28,28,27,22,21,25,24,18,8,4,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. c3 d5 4. Qa4 f6 5. d3 Be6 6. Be3 {C44: Ponziani Opening and Scotch Gambit.} Qd7 7. Nbd2 Nge7 {[#]} (7... f5 {is interesting.} 8. exf5 Bxf5 9. Be2 Bd6 10. O-O Nge7) 8. d4 $146 ({Predecessor:} 8. O-O-O a6 9. d4 exd4 10. Nxd4 Nxd4 11. Qxd7+ Bxd7 12. Bxd4 O-O-O 13. Bd3 Nc6 14. Be3 {1-0 (44) Lee,Q (2272)-Rydstrom,T (2328) Budapest 2016}) 8... exd4 9. Nxd4 Nxd4 10. Qxd7+ Bxd7 11. Bxd4 dxe4 12. Nxe4 Nc6 13. Be3 O-O-O 14. O-O-O Be7 15. Be2 Rhe8 {[#]} 16. Rxd7 $1 Rxd7 17. Bg4 Ne5 18. Bxd7+ Kxd7 19. h3 (19. Bxa7 $2 b6 $17) 19... Nc4 20. Bf4 {[#]} (20. Bxa7 b6 $17) 20... Ba3 $1 21. Nxf6+ $1 gxf6 22. bxa3 $15 {[%mdl 4096] Endgame KRB-KRN} Re2 23. Rd1+ Kc6 24. Rd4 b5 25. a4 $1 Rxa2 {With the idea ...Ra1+.} 26. axb5+ Kxb5 27. Bg3 a5 28. Rd7 Ka4 29. Rxc7 (29. Rxh7 Kb3 $17) 29... Kb3 { [%CAl Ra2a1]} 30. Kd1 (30. Rb7+ $11 Kxc3 31. Kb1) 30... a4 $17 {[%mdl 1024] Black has strong compensation.} 31. Bh4 $2 {[#]} (31. Rb7+ $17 Kxc3 32. Rd7) 31... Ra1+ $2 (31... Rd2+ $1 $19 32. Kc1 Rc2+ {[%mdl 64] Double Attack} 33. Kd1 Nb2+ 34. Ke1 a3 35. Rb7+ Kc4 36. Rc7+ Kd3 37. Rd7+ Ke4 38. Re7+ Kf5 39. g4+ Kf4 40. Rxh7 a2) 32. Ke2 $15 a3 33. Rb7+ Kc2 34. Bxf6 a2 (34... Rb1 $17 35. Ra7 Rb2 ) 35. Ra7 $11 Kb3 36. Rb7+ $1 Ka4 (36... Kc2 $11 {keeps the balance.} 37. Ra7 Kb3 38. Rb7+ Kc2) 37. Ra7+ (37. Rb4+ $16 Ka5 38. Bd8+ (38. Rxc4 Re1+ {[%mdl 64] Decoy} 39. Kxe1 a1=Q+ 40. Ke2 Qa2+ {[%mdl 64] Double Attack} 41. Kd3 Qxf2 $15 { [%mdl 64] Double Attack}) 38... Ka6 39. Ra4+ (39. Rxc4 Re1+ {[%mdl 64] Decoy} 40. Kxe1 a1=Q+ 41. Ke2 Qa2+ {[%mdl 64] Double Attack} 42. Kd3 Qxf2 $15) 39... Kb5 40. Ra8) 37... Kb3 {Strongly threatening ...Rg1.} 38. Rb7+ $1 Ka4 (38... Kc2 $11 39. Ra7 Kb3) 39. Rb4+ $16 {[%mdl 64] Double Attack} Ka3 $2 (39... Ka5 $16 {is a better defense.} 40. Bd8+ (40. Rxc4 Re1+ {[%mdl 64] Decoy} 41. Kxe1 a1=Q+ 42. Ke2 Qa2+ {[%mdl 64] Double Attack} 43. Kd3 Qxf2 $15 {[%mdl 64] Double Attack}) 40... Ka6 41. Ra4+ (41. Rxc4 Re1+ {[%mdl 64] Decoy} 42. Kxe1 a1=Q+ 43. Ke2 Qa2+ {[%mdl 64] Double Attack} 44. Kd3 Qxf2 $15) 41... Kb5) 40. Be7 $18 ({And not} 40. Rxc4 Re1+ 41. Kxe1 a1=Q+ 42. Ke2 Qa2+ 43. Kd3 Qxf2 $11) 40... Nb2 {[#]} 41. Rb8+ $2 ({Only move:} 41. Kf3 $1 $18 Rc1 42. Rb7+ Ka4 43. Ra7+ Kb5 44. Rxa2 Rxc3+ 45. Kg4) 41... Ka4 $11 42. Ra8+ Kb3 {And now ...Na4 would win.} 43. Ra3+ Kc4 (43... Kc2 {is more complex.} 44. Bf6 Nc4 45. Ra7) 44. Bf6 Nd3 {aiming for ...Re1+.} 45. Kf3 Nc1 46. Ra4+ Kb5 (46... Kb3 {keeps more tension.} 47. Ra7 Rb1 48. c4 Nd3 49. c5 Nb2) 47. Ra8 (47. Ra7 {with more complications.} Kc4 48. Rc7+ Kd3 49. c4 Rb1 50. Ra7) 47... Kc4 (47... Rb1 { seems wilder.} 48. Ke4 Kc4 49. Rc8+ Kb3 50. c4 a1=Q) 48. Rc8+ Kb3 49. Rb8+ Kc4 50. Rc8+ ({Better is} 50. Rb4+ $11 Kd3 51. c4) 50... Kb3 $1 $14 51. c4 $1 Rb1 52. Ra8 Kxc4 (52... Nd3 {feels hotter.} 53. c5 Nxc5 54. Ra7 Rd1 55. Rxh7 Nd7) 53. Ke4 Rb6 54. Be5 Kb3 55. f4 Rb4+ 56. Ke3 Rb5 57. Kd2 {The position is equal. } Rc5 58. g4 Rc2+ 59. Kd1 Rc5 $1 60. Kd2 Rc2+ 61. Kd1 {Hoping for Rb8+.} Rc5 $1 62. Rb8+ Ka4 {Threatens to win with ...Rxe5!} 63. Ra8+ Kb3 {White used his chance. Weighted Error Value: White=0.22/Black=0.28} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "9.7"] [White "Saduakassova, Dinara"] [Black "Murzin, Volodar"] [Result "1/2-1/2"] [ECO "E68"] [WhiteElo "2500"] [BlackElo "2502"] [Annotator "TA"] [PlyCount "99"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 19,99,8,43,43,46,52,50,45,62,63,109,89,92,93,125,89,101,91,93,83,79,87, 91,67,63,59,81,78,89,55,68,33,62,14,14,12,8,12,12,10,8,10,21,9,10,8,4,6,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nbd7 7. O-O e5 8. e4 a6 9. h3 b5 10. dxe5 dxe5 11. Be3 {E68: King's Indian: Fianchetto: 6...Nbd7 7 0-0 e5 8 e4.} Bb7 (11... b4 12. Nd5 Rb8 13. Nxf6+ Qxf6 14. Qd2 Qe7 15. Rfd1 Nc5 16. Qd5 Na4 17. Rab1 Nb6 18. Qc5 Qxc5 19. Bxc5 {1/2-1/2 (86) Saduakassova,D (2500)-Murzin,V (2478) chess24.com INT 2021}) 12. Qc2 {[#]} bxc4 $146 ({Predecessor:} 12... c6 13. c5 a5 14. a3 a4 15. Ne1 Qe7 16. Nd3 Ne8 17. f4 Nc7 18. f5 Rad8 19. g4 Na6 20. Na2 Bf6 {1-0 (118) Nikolic,P (2645)-Polgar,J (2675) Monte Carlo 1996}) 13. Rfd1 {Nxe5! is the strong threat.White is slightly better.} Qe7 14. Nd2 Qe6 15. Na4 Bc6 16. Nxc4 Rab8 17. Nc5 Nxc5 18. Bxc5 Rfd8 19. b3 Ba8 20. Rxd8+ (20. h4 { is interesting.} Ne8 21. Be3 Bf8 22. Kh2 Nd6 23. Nxd6 Bxd6 24. f3) 20... Rxd8 21. Rd1 Rxd1+ 22. Qxd1 Nd7 23. Be3 Bf8 24. Nb2 Qc6 25. Qd3 Be7 26. Qc4 Bc5 { The position is equal.} 27. Bxc5 Nxc5 28. Nd3 Nd7 29. Qxc6 Bxc6 $11 {[%mdl 4096] Endgame KBN-KBN} 30. f3 Kf8 31. Kf2 Ke7 32. Ke3 Kd6 33. Bf1 Bb5 34. a4 Bxd3 35. Bxd3 {KB-KN} a5 36. Bc4 f6 37. Kd3 Kc5 38. Kc3 g5 39. h4 h6 40. Be6 Nb8 41. Bd5 $1 Na6 42. Bc4 Nb4 43. Bb5 $1 Na2+ 44. Kb2 Nb4 {[#] Threatens to win with ...Kd4.} 45. Kc3 c6 46. Bc4 Na2+ 47. Kb2 {And now hxg5 would win.} Nb4 {aiming for ...Kd4.} 48. Kc3 Kd6 49. Be2 Kc5 50. Bc4 {Weighted Error Value: White=0.05/Black=0.05} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "9.6"] [White "Mammadzada, Gunay"] [Black "Abdusattorov, Nodirbek"] [Result "1-0"] [ECO "B01"] [WhiteElo "2443"] [BlackElo "2634"] [Annotator "TA"] [PlyCount "55"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 11,55,23,34,14,19,26,32,28,16,14,11,0,0,0,68,72,66,64,84,15,95,77,113, 117,320,45,289,283,381,210,472,404,504,487,667,654,611,489,1050,1043,822,607, 845,783,1989,1831]} 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Bc4 Bf5 6. Nf3 e6 7. Bd2 {[#] aiming for Nd5. B01: Scandinavian Defence.} (7. O-O { with more complications.} Nbd7 8. a3 Bd6 9. Bd2 O-O 10. d5) 7... Bb4 {is cutting edge theory.} 8. a3 Bxc3 9. Bxc3 {White is slightly better.} Qb6 10. Qe2 O-O 11. Bb4 Re8 12. O-O-O {[#]} Na6 $146 (12... Nc6 $11) ({Predecessor:} 12... c6 13. Ne5 a5 14. Be1 Qc7 15. g4 Bg6 16. h4 b5 17. Ba2 Be4 18. g5 Bxh1 19. gxf6 gxf6 {1-0 (60) Amin,B (2686)-Seel,C (2475) Karlsruhe 2020}) 13. Bxa6 bxa6 14. Ne5 Rab8 15. Rhe1 ({White should try} 15. g4 $16 a5 16. Bc3) 15... Red8 (15... a5 $11 16. Nc4 {[%mdl 64] Double Attack} Qc6 17. Nxa5 Qxg2) 16. g4 Bg6 17. h4 {Strongly threatening h5.} Nd5 $2 {[#]} (17... a5 $16 {might work better.} 18. Nc4 Qa6 19. Nxa5 (19. Bxa5 Rd5 $16) 19... Rb5) 18. c3 $2 (18. h5 $1 $18) 18... Nxb4 $2 (18... a5 $14 19. h5 axb4 20. axb4 (20. hxg6 $2 bxa3 21. gxf7+ Kf8 $19) 20... f6) 19. axb4 $18 a5 20. b5 (20. h5 $142) 20... Rd5 $2 ( 20... Qxb5 21. Qxb5 Rxb5) 21. c4 ({Less strong is} 21. h5 Bxh5 22. gxh5 Qxb5 $18) 21... Rxd4 22. h5 {White is clearly winning.} Re4 23. Qd2 {White threatens Qd8+! and mate.} Rxe1 24. Rxe1 Qc5 (24... Bd3 $142 25. Qxd3 Qxf2) 25. hxg6 hxg6 26. Kb1 Re8 27. Qd7 Rf8 28. Nc6 {Weighted Error Value: White=0.63/ Black=0.84} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "9.5"] [White "Shuvalova, Polina"] [Black "Yip, Carissa"] [Result "1/2-1/2"] [ECO "B06"] [WhiteElo "2489"] [BlackElo "2430"] [Annotator "TA"] [PlyCount "115"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 11,115,25,41,14,19,16,32,35,45,25,47,27,86,2,46,29,52,50,54,58,73,66,39, 46,77,47,57,4,34,-145,-141,-112,27,0,39,45,89,-187,-187,-183,-195,-206,-189, -236,-235,-235,-227,-290,-212,-295,-182,-210,-210,-185,-200,-571,-79,-79,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-1,0,0,0,0,0,0,0,0,0,0,0,0,4,4,4,4,4,4, 4,0,0,0,0,0]} 1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. Be3 c6 5. Qd2 (5. Nf3 Nd7 6. a4 Qa5 7. Qd2 Ngf6 8. h3 O-O 9. Bd3 e5 10. O-O Re8 11. Rfe1 Nf8 12. Rab1 Qc7 13. b4 Ne6 14. dxe5 dxe5 15. Ne2 Bd7 16. c3 Rad8 17. Qc2 c5 18. Ng3 {1-0 (45) Shuvalova,P (2476)-Yip,C (2430) chess24.com INT 2021}) 5... Nd7 6. f4 b5 7. a3 {B06: Modern Defence.} Nb6 8. Nf3 {[#]} a5 $146 ({Predecessor:} 8... Bg4 9. d5 Na4 10. Bd4 Nf6 11. dxc6 Nxc3 12. Qxc3 O-O 13. Bd3 Bxf3 14. gxf3 a6 {1/2-1/2 (38) Votava,J (2540)-Oral,T (2460) Turnov 1996}) 9. Bd3 {White is slightly better.} Nf6 10. h3 O-O 11. O-O Bb7 (11... Nc4 $11 {keeps the balance.} 12. Bxc4 bxc4) 12. Rf2 ({White should play} 12. f5 $16) 12... Rc8 13. b4 axb4 14. axb4 Ra8 15. Raf1 Ra3 16. f5 Nc4 17. Bxc4 bxc4 18. fxg6 hxg6 19. Ng5 (19. e5 $1 $14) 19... c5 $11 20. Nb5 $2 {[#]} (20. bxc5 $14 {keeps the upper hand.} dxc5 21. e5 (21. dxc5 Qxd2 22. Bxd2 Nd7 $11)) 20... Rxe3 $1 $17 {[%mdl 512]} 21. Qxe3 Qb6 ({Black should try} 21... Bh6 $1 $17 22. bxc5 (22. dxc5 Nxe4 {[%mdl 64] Pin} 23. h4 dxc5 $17) 22... Nxe4 $1) 22. e5 Qxb5 (22... cxd4 {looks sharper.} 23. Nxd4 dxe5 24. Nf5 Qxe3 25. Nxe3 Bh6) 23. exf6 exf6 24. Ne4 { [%mdl 8192]} (24. Rxf6 $16 {is necessary to keep the advantage.} Bxf6 25. Rxf6 cxb4 26. Nxf7 Rxf7 27. Rxg6+ Kf8 28. Rxd6 (28. Qh6+ $2 Ke7 $19)) 24... Bxe4 $19 25. Qxe4 f5 ({Don't play} 25... cxb4 26. g4 $17) 26. Qd5 {[%CAl Rb4c5]} Bxd4 27. c3 Bxf2+ ({But not} 27... Bxc3 28. g4 $17) 28. Rxf2 {[%mdl 4096] Endgame KQR-KQR} Re8 29. Rf4 Qa4 {And now ...Qa1+ would win.} 30. bxc5 dxc5 31. Rxc4 Qa1+ 32. Kh2 Re1 33. Qxc5 $2 {[#]} (33. Qd2 {is tougher.}) 33... Rh1+ $2 (33... g5 $1 $19 {and Black stays clearly on top. aiming for ...Rh1+.} 34. Kg3 Qd1 35. Qxf5 Re3+ 36. Kh2 Qd6+ 37. Kg1 Qg3) 34. Kg3 $17 Rf1 (34... Qe1+ $17 35. Qf2 Qe5+ 36. Qf4 Qe1+ 37. Qf2 Qe8) 35. Qe5 {White threatens Rc8+ and mate.The position is equal.} Qe1+ 36. Qxe1 Rxe1 $11 {KR-KR} 37. Kf3 Kf8 38. Rd4 Ke7 39. Rd3 {Threatens to win with Re3+.} Rc1 40. Kf4 Kf6 41. Rd6+ Ke7 42. Rd3 Kf6 43. Rd6+ Ke7 44. Rc6 Kd7 45. Rc4 Ke6 46. Rc7 Rc2 47. g3 Kf6 48. Rc6+ Ke7 49. g4 fxg4 50. hxg4 Kd7 51. Rc4 Ke6 52. Kg5 f5 (52... Rf2 {seems wilder.} 53. Re4+ Kd6 54. Rd4+ Ke5 55. Ra4 Kd6) 53. Kxg6 fxg4 54. Rxg4 Rxc3 55. Kg5 Rc5+ 56. Kf4 Rc4+ 57. Kf3 Rxg4 58. Kxg4 {White happily takes the draw. Weighted Error Value: White=0.37/Black=0.23} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "9.4"] [White "Abdumalik, Zhansaya"] [Black "Nihal Sarin"] [Result "0-1"] [ECO "B90"] [WhiteElo "2472"] [BlackElo "2620"] [Annotator "TA"] [PlyCount "90"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 12,90,10,0,14,11,29,30,37,0,0,-20,0,-27,0,-11,-25,-21,0,-24,-25,-64,-45, -58,-8,-9,0,0,0,0,6,-18,-14,-37,-35,-52,-42,-62,-81,-96,-88,-80,-50,-58,-43, -181,-203,-228,-208,-214,-206,-271,-259,-372,-318,-329,-312,-327,-330,-319, -325,-325,-309,-322,-332,-318,-320,-307,-305,-349,-344,-584,-534,-791,-722, -29970,-29968,-5481,-2054,-29986,-29987]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. h3 e5 $1 {6...e5 is better than 6...e6.} 7. Nde2 h5 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.} 8. g3 Be7 9. Bg2 b5 {White has an edge.} 10. Bg5 Nbd7 11. h4 Bb7 12. a3 Rc8 13. O-O O-O 14. Qd2 {[#]} Qb6 $146 ({Predecessor:} 14... Rc7 15. f3 Nb6 16. Rad1 Qa8 17. Bxf6 Bxf6 18. Qxd6 Rc6 19. Qb4 Re8 20. Qb3 Rc4 {0-1 (54) Chukavin,K (2274) -Kosakowski,J (2413) Porto Carras 2018}) 15. Be3 Qc7 16. Rac1 Nb6 {...Nc4 is the strong threat.} 17. b3 Rfd8 18. Nd5 Nbxd5 19. exd5 Qd7 20. c4 Re8 21. f3 bxc4 22. bxc4 a5 23. Kh2 Qa4 24. Nc3 Qxc4 {[%CAl Rf6d5]} 25. Bh3 Rb8 {[%CAl Rf6d5]} 26. Rfd1 Qa6 27. a4 Qa8 28. g4 {Loses the game.} ({White should try} 28. Qd3 $15) 28... hxg4 $19 29. fxg4 Bc8 30. Nb5 {Threatening Nc7.} Bxg4 (30... Nxg4+ 31. Bxg4 Bxg4 32. Rg1 $17) 31. Nc7 Qb7 32. Rg1 (32. Nxe8 $142 Rxe8 33. Bxg4 Nxg4+ {[%mdl 64] Discovered Attack} 34. Kg2) 32... Bxh3 33. Nxe8 Rxe8 34. Kxh3 Qd7+ (34... Qxd5 35. Qxd5 Nxd5 36. Bd2 $17) (34... Nxd5 $2 35. Kh2 $19) 35. Kh2 Ng4+ ({Weaker is} 35... Qxa4 36. Bg5 $19) 36. Kh1 Bxh4 {[#] Strongly threatening ...Nf2+!} ({Not} 36... Qxa4 37. Bg5 $17) 37. Rg2 Qf5 ({Don't play} 37... Qxa4 38. Bg5 $19) 38. Qe2 Nxe3 39. Qxe3 g6 40. Kg1 Rb8 41. Kh2 $2 {[#]} ( 41. Rf1 {was necessary.} Rb1 42. Rxb1 Qxb1+ 43. Kh2) 41... Kg7 42. Rc7 Rb4 43. Rc6 Re4 44. Qd2 Rf4 (44... Be1 $142 45. Qg5 Rh4+ 46. Qxh4 Bxh4) 45. Rxd6 Bf2 { [%CAl Rf5h5] Weighted Error Value: White=0.67/Black=0.14} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "9.3"] [White "Lei, Tingjie"] [Black "Zhu, Jiner"] [Result "1/2-1/2"] [ECO "E11"] [WhiteElo "2505"] [BlackElo "2462"] [Annotator "TA"] [PlyCount "95"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 16,95,13,0,0,0,0,0,0,7,7,0,17,3,27,25,54,52,50,58,59,54,50,51,51,51,85, 56,79,62,71,59,57,54,65,41,49,44,39,46,54,41,37,20,19,19,19,19,22,0,18,20,18, 17,17,18,26,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-2,0,-4]} 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Nf3 Bb4+ 5. Bd2 Be7 6. Bg2 O-O 7. O-O c6 8. Qc2 b6 9. Ne5 Bb7 {E11: Bogo-Indian.} 10. Rd1 Nbd7 11. cxd5 cxd5 12. Nc6 Bxc6 13. Qxc6 Rc8 14. Qb5 Qc7 15. Nc3 Qc4 16. Qxc4 Rxc4 17. e3 {[#]} Nb8 $146 ({Predecessor:} 17... Rc7 18. Rdc1 Rfc8 19. Bf1 Ne4 20. Nb5 Rxc1 21. Rxc1 Rxc1 22. Bxc1 {1/2-1/2 (41) Alfaro de Hombre,J (2178)-Kraujunas,V (1977) ICCF email 2016}) 18. Rac1 a6 19. Bf1 Rcc8 20. Bd3 Rfd8 21. f3 Kf8 22. Kf2 h6 23. Ne2 b5 24. Ba5 Re8 25. Bc7 Nfd7 26. Rc2 Bd8 $1 27. Bxb8 Rxb8 28. Rc6 Rb6 29. Rdc1 (29. Rc3 {is interesting.} g6 30. f4 Nf6 31. Kf3 h5 32. Rdc1) 29... Rxc6 30. Rxc6 Nb8 31. Rc2 Bb6 32. Nc1 Re7 33. Nb3 Rc7 34. Rxc7 Bxc7 $11 {[%mdl 4096] Endgame KBN-KBN} 35. Nc5 Ke7 36. a4 bxa4 {The position is equal.} 37. Nxa4 a5 38. Bb5 Nd7 39. g4 Nb6 40. Nc5 Bd6 41. Nd3 a4 42. h4 a3 43. bxa3 Bxa3 44. h5 Bd6 45. e4 dxe4 46. fxe4 Bc7 47. Nc5 e5 48. dxe5 {Weighted Error Value: White=0.05/Black=0.04} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "9.2"] [White "Bjerre, Jonas Buhl"] [Black "Mendonca, Leon Luke"] [Result "1/2-1/2"] [ECO "B90"] [WhiteElo "2542"] [BlackElo "2549"] [Annotator "TA"] [PlyCount "110"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 15,110,23,29,25,35,31,37,35,46,12,4,3,4,4,4,0,13,0,0,0,0,0,0,-8,29,27, 49,-103,-105,-101,-96,-107,-29,-29,-32,-33,-49,-37,-45,-42,-40,-27,-53,-81,-81, -81,-69,-97,-78,-81,-91,-72,0,0,0,-22,0,0,4798,2327,4810,2860,5382,5381,29975, 29976,29976,29977,29979,29977,12846,1389,765,425,398,391,384,384,384,22,22,22, 22,22,22,22,22,22,22,9,9,9,9,9,14,-8,-8]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6 8. f3 h5 9. Nd5 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.} Bxd5 10. exd5 Nbd7 11. Qd2 { White is slightly better.} g6 12. O-O-O $1 {[%mdl 4] is currently scoring better than 12.Be2.} Nb6 13. Qa5 Bh6 14. Bxh6 Rxh6 15. Qd2 Rh8 16. f4 exf4 ( 16... Nbxd5 $6 17. fxe5 dxe5 18. Bc4 $16) 17. Qxf4 Kf8 18. Bd3 Kg7 ({But not} 18... Nfxd5 $6 19. Qd4 $16) 19. Nd4 Re8 20. Rhf1 Nbxd5 {[#]} 21. Qg5 $146 (21. Nf5+ $1 $14 {was forced to keep a grip.} gxf5 22. Qg5+ Kf8 23. Qh6+ Kg8 24. Bxf5) ({Predecessor:} 21. Nf5+ gxf5 22. Qg5+ Kf8 23. Qh6+ Ke7 24. Bxf5 Qa5 25. Bh3 Qxa2 26. Rxf6 Nxf6 27. Re1+ Kd8 28. Qxf6+ Kc7 29. Qc3+ Kb6 30. Qd4+ { 1/2-1/2 (30) Voll,A (2567)-Weber,J (2563) ICCF email 2017}) 21... Ne3 $17 { aiming for ...Nfg4.} 22. Nf5+ Nxf5 23. Rxf5 Ne4 (23... Rc8 $17 24. Rdf1 Re6) 24. Bxe4 $11 {White threatens Rxf7+! and mate.} Qxg5+ ({Reject} 24... Rxe4 25. Rxf7+ $1 Kxf7 26. Qd5+ Re6 27. Rf1+ Kg7 28. Qxe6 $14) 25. Rxg5 Rxe4 26. Rxd6 Rg4 27. Rxg4 hxg4 $15 {[%mdl 4096] Endgame KR-KR} 28. Kd2 Rh8 29. Ke3 Rxh2 30. Kf2 Rh5 31. Kg3 Rb5 32. b3 f5 33. c4 Rb4 ({Better is} 33... Ra5 $17 34. a4 Re5 35. Rd7+ Kf6 36. Rxb7 Re2) 34. Kf4 $11 {With the idea Kg5.} Kh6 35. Ke5 { Black must now prevent Kd4.} Kg5 (35... a5 {feels hotter.} 36. Kf6 f4 37. Ke5 Kg5 38. Ke4 a4) 36. Kd4 {Hoping for Kc3.} a5 $2 {[%mdl 8192] [#]} (36... f4 $11 ) 37. Kc3 $1 $18 f4 38. a3 f3 39. gxf3 Rxb3+ 40. Kxb3 gxf3 {KR-KP} 41. Rd7 Kf4 42. Kc2 f2 43. Kd2 f1=N+ {KR-KN} 44. Ke1 Ne3 45. c5 Ke4 46. Rxb7 {Strongly threatening Re7+.} Kd5 47. Rc7 $2 (47. Kd2 $18 Nc4+ 48. Kc3 Nxa3 49. Rb3) 47... Nc2+ $11 {The position is equal.} 48. Kd2 Nxa3 49. Rc8 Nc4+ 50. Kc3 {And now Rd8+ would win.} Ne5 51. Kb3 Nc6 52. Ka4 Kxc5 53. Rg8 Ne5 54. Kxa5 Kd5 55. Rxg6 Nxg6 {Black escapes into a draw. Weighted Error Value: White=0.36/Black=0.27} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "9.1"] [White "Praggnanandhaa R"] [Black "Keymer, Vincent"] [Result "1-0"] [ECO "A06"] [WhiteElo "2608"] [BlackElo "2591"] [Annotator "TA"] [PlyCount "79"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,79,5,14,0,0,-8,0,0,23,22,19,19,20,27,32,31,37,44,45,33,25,30,53,26,78, -20,-18,-28,-17,-19,-24,-93,-45,-54,-55,-62,-53,-50,-5,-18,0,0,0,-12,-20,-14, -10,-107,-99,-92,0,-69,49,0,98,98,139,73,113,100,133,133,129,130,420,421,504, 480,885,791,939,939]} 1. Nf3 d5 2. h3 c6 3. d4 Bf5 4. c4 e6 5. Nc3 Nf6 6. g4 { [#] A06: Réti Opening: 1 Nf3 d5.} Bg6 $146 ({Predecessor:} 6... Be4 7. Bg2 h6 8. Bf4 Bd6 9. Bxd6 Qxd6 10. c5 Qc7 11. Nxe4 Nxe4 12. Ne5 Nxc5 13. Nxf7 Kxf7 14. dxc5 {1-0 (57) Raeva,E (2143)-Jovkova Draganova,P (2046) Sofia 2003}) 7. Qb3 Qb6 8. c5 {The position is equal.} Qc7 {[#]} 9. Bf4 $1 Qc8 (9... Qxf4 $6 10. Qxb7 Bxc5 11. Qxa8 $16 (11. dxc5 O-O $14)) 10. Ne5 {h4 is the strong threat.} Nbd7 11. Nxg6 hxg6 12. Bg2 e5 13. dxe5 Nxc5 14. Qc2 Nfd7 15. Bg3 Ne6 16. f4 Qd8 {[#]} (16... Bc5 $11) 17. e3 (17. O-O-O $1 $16) 17... Bc5 18. Qe2 Qb6 19. f5 Nc7 20. Bf4 (20. O-O-O $11) 20... g5 21. Bxg5 Nxe5 22. O-O-O f6 23. Bf4 O-O-O 24. Na4 Qa5 25. Nxc5 Qxc5+ 26. Kb1 (26. Qc2 $5 {[%CAl Rc2c5]} Qb6 27. Kb1 $11) 26... Rhe8 27. Qc2 Nc4 28. Ka1 {[#]} (28. Rd3 $11) 28... Na6 $1 $17 29. Rc1 Qa5 (29... Nb4 $17 30. Qc3 Qb6) 30. e4 ({White should try} 30. Qc3 $1 $11) 30... Nb6 ({Don't play} 30... Nb4 $6 31. Qb3 $14) (30... b5 $1 $15 31. Qc3 Qxc3 32. Rxc3 d4) 31. Rhd1 (31. Bd2 $5 {[%CAl Rd2a5]} Qa4 32. Qxa4 Nxa4 33. exd5 $14) 31... d4 (31... dxe4 $11 {keeps the balance.} 32. Rxd8+ (32. Bxe4 Rxd1 33. Rxd1 Nb4 $17 {[%mdl 64] Double Attack}) 32... Rxd8) 32. a3 $36 {[%mdl 2048] White has strong initiative.} Nc7 33. Bh2 ({White should play} 33. g5) 33... Qb5 34. Rd3 Qa4 35. Qxa4 Nxa4 36. Rc4 b5 {[%mdl 8192] Black cannot hold the game after this.} (36... Nb6 $16 {was necessary.} 37. Rcxd4 Nd7) 37. Rxc6 $18 Re7 { White is clearly winning.} 38. Rd1 Kb7 (38... Nb6 $142 39. b3 Kb8) 39. e5 Nd5 40. Rd6 {Weighted Error Value: White=0.24/Black=0.41} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "8.10"] [White "Mendonca, Leon Luke"] [Black "Praggnanandhaa R"] [Result "0-1"] [ECO "E14"] [WhiteElo "2549"] [BlackElo "2608"] [Annotator "TA"] [PlyCount "60"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 11,60,-7,0,-1,5,6,7,0,5,0,14,7,36,28,47,0,10,-73,-87,-89,-88,-110,-103, -119,-114,-118,-85,-121,-60,-135,-130,-224,-222,-224,-208,-224,-208,-685,-707, -1064,-1045,-1002,-1137,-29990,-29991,-29994,-29995,-29997,-29993,-29998, -29999]} 1. Nf3 d5 2. e3 Nf6 3. c4 e6 4. Nc3 b6 5. cxd5 exd5 6. d4 Bb7 7. b3 { E14: Queen's Indian: Classical Variation (4 e3).} a6 8. Bb2 Nbd7 9. g3 { The position is equal.} Bd6 10. Bg2 Qe7 $5 {[%mdl 4] An interesting side line.} 11. O-O O-O-O 12. a4 h5 13. Qc1 {[#]} Ne4 $146 ({Predecessor:} 13... h4 14. Ba3 hxg3 15. hxg3 Ne4 16. Nxe4 dxe4 17. Nd2 f5 18. Nc4 Bxa3 19. Qxa3 Qe6 {0-1 (27) Harikrishna,P (2732)-Dominguez Perez,L (2758) Lichess.org INT 2020}) 14. Nxe4 ( 14. a5 $11) 14... dxe4 $17 {White is on the road to losing.} 15. Nd2 h4 16. Ba3 Bxa3 17. Qxa3 {[#]} Qe6 18. Rfc1 f5 19. Rc2 Nf6 (19... Kb8 $17 20. b4 Rc8) 20. Rac1 (20. a5 $15) 20... Nd5 21. a5 (21. b4 $17 {was worth a try.}) 21... hxg3 $19 22. hxg3 {[#]} b5 23. b4 Rh5 ({Resist} 23... Qh6 24. Nb3 $17) 24. Nb3 $2 ( 24. Nf1) 24... Rdh8 25. Nc5 Qh6 26. Kf1 Rh2 {( -> ...Rxg2)} 27. Nxb7 {[#]} Rxg2 $1 {[%mdl 512] Black mates.} 28. Nd6+ (28. Rxc7+ Nxc7) 28... Kb8 29. Nxf5 Qh1+ 30. Ke2 {[#]} Rxf2+ $1 {[%mdl 512] Weighted Error Value: White=0.76/Black=0.05} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "8.9"] [White "Zhu, Jiner"] [Black "Bjerre, Jonas Buhl"] [Result "1/2-1/2"] [ECO "B90"] [WhiteElo "2462"] [BlackElo "2542"] [Annotator "TA"] [PlyCount "147"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 15,147,3,45,0,39,0,5,0,13,0,10,0,12,0,0,-16,14,0,17,18,29,10,39,18,52, 54,42,43,55,13,22,16,58,60,71,61,60,34,77,59,62,40,75,72,100,93,93,47,43,43,51, 48,61,52,64,0,0,0,64,43,103,7,88,8,4,7,25,27,33,33,36,39,24,29,26,24,102,45,60, -21,-21,-61,-75,-66,-72,-69,-59,-144,-144,-164,-164,-149,-149,-150,-90,-87,-28, -136,-46,-46,-46,-52,-52,-52,-52,-72,0,0,0,0,0,-27,0,0,0,0,0,0,0,0,0,0,2,0,0,0, 0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nf3 Be7 8. Bc4 Be6 9. Qe2 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.} Nbd7 10. O-O Qc7 11. Bb3 Rc8 12. Rfd1 O-O 13. Bg5 b5 14. Bxf6 Nxf6 15. Ne1 {[#]} Bd8 $146 (15... Bg4 {feels hotter.} 16. f3 Bd7 17. a3 a5 18. Kh1 Qb8) ({Predecessor:} 15... Bc4 16. Qe3 Qb7 17. Bxc4 Rxc4 18. b3 Rc5 19. Qf3 b4 20. Nd5 Nxd5 21. Rxd5 Rxd5 22. exd5 {1-0 (38) Novotny,M (2255) -Kriebel,T (2321) Czech Republic 2011}) 16. Nd5 Qc6 17. Nxf6+ Bxf6 18. Bd5 Qd7 19. c3 Bd8 20. a4 Bb6 21. axb5 axb5 22. Ra6 Rb8 23. Kh1 Kh8 24. f3 Qc8 25. Raa1 Bc5 26. Nc2 Bd7 27. Qd2 f5 28. exf5 Rxf5 29. Ne3 Rh5 30. b4 Bb6 31. Bf7 Rh6 { Strongly threatening ...Qf8.} 32. Nd5 Bd8 33. Ra7 Bc6 34. Qd3 Ra8 35. Rda1 (35. Rxa8 $14 Qxa8 36. Ne3) 35... Rxa7 $11 36. Rxa7 Qb8 (36... Bg5 $11) 37. Qe3 $14 Rh4 (37... Qc8 $14) 38. Ra6 (38. Ne7 $1 $16 {[%CAl Re7c6]} Bb7 39. Bb3) 38... Rc4 (38... Qc8 $11 {remains equal.} 39. Qa7 Bxd5 40. Bxd5 Rd4 $1) 39. Ne7 Bb7 $11 40. Bxc4 Bxa6 41. Nc6 Qb6 42. Qxb6 Bxb6 $14 {[%mdl 4096] Endgame KBB-KBN} 43. Bd3 Be3 44. Nb8 Bb7 45. Bxb5 d5 (45... Kg8 $11 {keeps the balance.}) 46. Bd3 (46. Bc6 $16 Bxc6 47. Nxc6) 46... Bd2 47. c4 ({White should play} 47. Ba6 $1 $14 Bxa6 48. Nxa6) 47... e4 $11 48. fxe4 dxe4 49. Be2 Bxb4 50. Nd7 Kg8 51. Kg1 {[#]} (51. c5 $15) 51... Kf7 $1 $17 52. Ne5+ Ke6 53. Ng4 Bc5+ 54. Kf1 e3 ({ Better is} 54... Kf5 55. g3 Ba6) 55. h3 Kf5 (55... Be4 $17) 56. Nh2 (56. Bd3+ $11 {was the only way to keep the balance.} Ke6 57. Bxh7) 56... Kf4 (56... Ke4 $17 57. Nf3 (57. Bf3+ Kd3 $17) 57... h6) 57. Bf3 $15 Bc8 58. Bd5 Bf5 {( -> ... Bd3+)} 59. Ke2 h5 60. Nf1 g5 ({Black should try} 60... h4 $17) 61. g3+ $11 Ke5 62. Nxe3 Bxh3 63. Bf7 Ke4 64. Bg6+ {The position is equal.} Kd4 65. Bxh5 Be6 66. Bf3 Bxc4+ 67. Nxc4 Kxc4 {KB-KB} 68. g4 Bd6 69. Be4 Bf4 70. Bf5 Kc5 71. Bc8 Kc4 72. Bf5 Kc5 73. Bc8 Kc4 74. Bf5 {Weighted Error Value: White=0.24/Black=0. 22} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "8.8"] [White "Nihal Sarin"] [Black "Lei, Tingjie"] [Result "0-1"] [ECO "A13"] [WhiteElo "2620"] [BlackElo "2505"] [Annotator "TA"] [PlyCount "90"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,90,10,9,9,10,0,0,0,0,0,0,0,0,0,0,0,4,-19,-22,-36,-25,-69,-45,-42,-44, -132,-56,-77,-69,-67,0,-90,-91,-80,44,47,47,54,57,44,156,172,121,-237,-221, -238,0,0,12,-154,-183,-152,-92,-278,-252,-1017,-627,-491,-41,-41,-41,-149,-137, -134,-116,-29977,-29978,-29978,-29979,-29979,-29980,-29980,-29981,-29981, -29982,-29981,-29982,-29983,-29984,-29983,-29984,-29981,-12843]} 1. Nf3 d5 2. b3 Nf6 3. Bb2 e6 4. e3 b6 5. c4 Bb7 6. Nc3 {A13: English Opening: 1...e6.} Nbd7 7. cxd5 exd5 8. Rc1 {The position is equal.} a6 9. d4 Bd6 10. g3 Qe7 11. Bg2 O-O-O 12. O-O {[#]} h5 $146 ({Predecessor:} 12... Kb8 13. Ne2 Ne4 14. Nf4 h5 15. Nd3 f6 16. b4 Bxb4 17. Nxb4 Qxb4 18. Qc2 Qd6 {1/2-1/2 (84) Mekhitarian,K (2563)-Dominguez Perez,L (2758) Chess.com INT 2020}) 13. Re1 Ne4 14. Qc2 Kb8 15. h4 f6 16. a4 g5 17. b4 (17. Red1 $15) 17... Rhg8 (17... Bxb4 $17 18. hxg5 Bxc3 19. gxf6 Ndxf6 20. Bxc3 h4 21. Nxh4 Rdg8) 18. b5 {[#]} a5 19. Qb3 Nxc3 ( 19... Nxg3 $15 20. fxg3 Bxg3) 20. Bxc3 (20. Rxc3 $11 {remains equal.} g4 21. Nd2) 20... Qg7 $17 21. Rc2 {[#]} Rde8 (21... Nf8 $1 $17) 22. Rec1 $1 $14 Re4 { Threatens to win with ...gxh4.} 23. hxg5 h4 24. Nxh4 {[%mdl 64] Strongly threatening Nf5. Discovered Attack} Rxh4 25. gxh4 $16 {Black must now prevent f4.} fxg5 26. Bxd5 $2 {[%mdl 8192]} (26. h5 $16 Nf6 27. Bb2) 26... gxh4+ $19 27. Kf1 Qg1+ (27... Bxd5 $19 28. Qxd5 h3) 28. Ke2 $11 Qg4+ 29. Kd2 $2 (29. f3 $1 $11 Bxd5 30. Qxd5 (30. fxg4 $2 {is the wrong capture.} Bxb3 31. Rd2 Bxa4 $19 )) 29... Bxd5 $17 30. Qxd5 Nf6 (30... h3 $142 {Hoping for ...Nf6.} 31. f3 Qg6) 31. Qh1 $2 (31. Qc6 $17 Qf5 32. Rf1) 31... Qf5 $19 32. Rg1 $2 (32. Ke2 h3 33. Qf3) 32... Rxg1 33. Qxg1 Ne4+ $2 ({Better is} 33... h3 $19 {And now ...Ne4+ would win.} 34. f4 Ng4) 34. Kc1 $1 $15 {[%CAl Rc1b2]} h3 {[%mdl 1024] Black has compensation.} 35. f4 ({White should try} 35. Kb2 $1 $15) 35... Qe6 $17 36. Kb2 Qc4 {aiming for ...Ba3+!} 37. Qh1 $2 {[%mdl 8192] [#]} (37. Qb1 $17) 37... Ba3+ $1 {[%mdl 576] Deflection. Black mates.} 38. Kxa3 Nxc3 39. Rxc3 Qxc3+ { [%mdl 4160] Endgame Double Attack. KQ-KQ} 40. Ka2 Qd2+ 41. Kb3 Qxe3+ 42. Kc4 Qe2+ 43. Kc3 Qg2 44. Qe1 h2 45. Qe8+ Ka7 {Weighted Error Value: White=0.53/ Black=0.50} (45... Kb7 $142 46. Qh8 h1=Q 47. Qxh1 Qxh1 48. Kd3 Qd1+ 49. Ke4 Qxa4 50. Kf5 Qxd4 51. Kg5 a4 52. Kg4 a3 53. Kg3 a2 54. Kh4 Qxf4+ 55. Kh5 a1=Q 56. Kg6 Qg1+ 57. Kh7 Qh4#) 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "8.7"] [White "Yip, Carissa"] [Black "Abdumalik, Zhansaya"] [Result "1-0"] [ECO "D76"] [WhiteElo "2430"] [BlackElo "2472"] [Annotator "TA"] [PlyCount "107"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 18,107,34,34,76,60,79,50,86,65,72,57,111,37,137,97,91,56,112,117,126,0, 50,51,72,64,84,98,95,55,61,52,56,55,56,47,60,43,36,-57,0,0,0,0,-14,0,0,-9,139, 133,223,221,248,173,162,169,164,115,128,8,187,179,189,177,160,131,654,660,643, 643,643,643,632,625,625,610,628,612,2474,2350,2498,2131,6747,7173,7025,6843, 6130,6412,6179,5950,5098,5014]} 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. c4 d5 5. cxd5 Nxd5 6. O-O O-O 7. d4 Nb6 8. Nc3 Nc6 9. d5 Nb4 10. e4 a5 {D76: Fianchetto Grünfeld: Main Line with 7...Nb6.} 11. a3 Na6 {[#]} 12. Qc2 $146 ({ Predecessor:} 12. Bg5 h6 13. Bf4 e6 14. Re1 Re8 15. dxe6 Bxe6 16. Qc2 c6 17. Rad1 Qc8 18. Be3 {1-0 (44) Wojtkiewicz,A (2570)-Movsziszian,K (2480) Hamburg 1993}) 12... e6 {White is slightly better.} 13. Bg5 Qe8 14. Rfe1 Bd7 (14... e5 $14) 15. Rad1 (15. dxe6 $16 Qxe6 16. Rad1) 15... Rc8 ({Black should try} 15... e5 $1 $14) 16. Qc1 e5 17. Bh6 Nc5 ({Better is} 17... Qe7 $14) 18. Bxg7 $16 Kxg7 19. Qg5 (19. Nb1 $16 Nba4 20. Qe3) 19... f6 (19... Nc4 {feels hotter.} 20. Bf1 f6 21. Qc1 Nd6 22. Qe3 Nb3) 20. Qe3 Qe7 21. Nd2 Nba4 22. Nxa4 Bxa4 23. b3 (23. Rc1 {is more complex.} b6 24. Bf1 Ra8 25. b3 Be8 26. Rc3) 23... Bb5 24. Bf1 Bxf1 25. Kxf1 b6 26. Nc4 Qd7 27. Kg2 Qb5 28. d6 (28. Rb1 $14) 28... Qxb3 29. Qxb3 Nxb3 30. dxc7 $1 Rxc7 31. Nxb6 Rc2 32. Rd5 f5 (32... Rf7 $11 {keeps the balance.}) 33. Nd7 {[%mdl 64] Double Attack} ({Inferior is} 33. Rxe5 fxe4 34. Re7+ Kg8 $11) 33... Rf7 (33... Re8 $16 34. exf5 (34. Rxe5 Rxe5 35. Nxe5 Nc5 $14 ) (34. Nxe5 fxe4 35. Rxe4 Nc5 $16) 34... e4 35. f6+ Kf7) 34. Nxe5 $18 Rf8 { intending ... fxe4.} 35. Nd7 Re8 36. e5 a4 37. e6 Re7 38. Re3 (38. Nb6 $16 { Threatens to win with Rd7.} Rc6 39. Rd7 $1 (39. Nxa4 Kf6 $16)) 38... h5 $2 {[#] } (38... Rc6 $1 $11 {and Black has nothing to worry.}) 39. Nb6 $1 $36 {[%mdl 2048] And now Rd7 would win. White is really pushing.} Nc5 {[#]} 40. Rd7 $1 { [%CAl Rd7e7][%mdl 512]} Kf8 41. Rd8+ Kg7 $2 {[%mdl 8192] Loses the game.} ( 41... Re8 $16) 42. Rc8 {White is clearly winning.} Rb2 43. Nd5 ({Not} 43. Rxc5 Rxb6 44. Ra5 Rb3 $16) 43... Rxe6 44. Rxc5 Rxe3 45. Nxe3 {[%mdl 4096] Endgame KRN-KR} Rb3 46. Nc4 Rc3 47. Rc6 f4 48. gxf4 h4 49. f3 Kh7 50. Ne5 Rxa3 51. Rxg6 Re3 52. Ra6 a3 53. Ra7+ Kg8 54. Kh3 {Weighted Error Value: White=0.24/Black=0. 57} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "8.6"] [White "Abdusattorov, Nodirbek"] [Black "Shuvalova, Polina"] [Result "1-0"] [ECO "C68"] [WhiteElo "2634"] [BlackElo "2489"] [Annotator "TA"] [PlyCount "33"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,33,27,22,24,17,21,50,51,83,0,6,8,0,3,522,522,513,521,892,891,851,620, 615,620,614,602]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O Qf6 6. d4 { C68: Ruy Lopez: Exchange Variation, sidelines.} exd4 7. Bg5 Qg6 8. Qxd4 { [%csl Gg5][%CAl Rd4d8] [#]White is slightly better.} Be6 9. Rd1 (9. Re1 $16) 9... Bd6 $1 $11 10. Nbd2 f6 11. Bh4 $40 {[%mdl 128] [#] White attacks.} O-O-O $146 {[%mdl 8192] Loses the game.} (11... c5 $11 12. Qc3 Nh6) ({Predecessor:} 11... c5 12. Qc3 Ne7 13. Nc4 Bf4 14. Ncd2 b6 15. Bg3 Bxg3 16. hxg3 Nc6 17. a3 O-O {1/2-1/2 (54) Paler,A (2074)-Molina,F (2216) Verona 2017}) 12. Qa7 $18 { White is clearly winning.} Ne7 13. e5 fxe5 {[#]} 14. Nc4 $1 {[%mdl 512] White threatens Qa8+ and mate.} Bd5 15. Ncxe5 Bxe5 16. Qa8+ ({Less strong is} 16. Bxe7 Bd6 $16) 16... Kd7 17. Nxe5+ {Weighted Error Value: White=0.34/Black=0.72} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "8.5"] [White "Murzin, Volodar"] [Black "Mammadzada, Gunay"] [Result "1-0"] [ECO "B53"] [WhiteElo "2502"] [BlackElo "2443"] [Annotator "TA"] [PlyCount "111"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,111,12,9,16,12,14,14,8,18,8,12,0,18,15,17,13,16,2,51,25,13,0,36,41,35, -216,-206,-240,0,0,0,0,0,0,0,4,6,0,0,-10,-11,-27,0,0,0,0,0,0,0,0,0,-8,0,0,0,0, 0,0,18,0,0,0,0,0,0,0,7,7,0,0,0,0,0,-8,-8,-8,403,403,392,362,307,261,1386,1347, 1420,889,29976,29977,29977,29978,29978,29979,29979,29980,29981,29982,29982, 29983,29983,29984,29984,29985,29985,29986]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nf6 5. Be2 Nc6 6. Qe3 {B53: Sicilian: 2...d6: Lines with Qxd4.} g6 7. O-O Bg7 8. Rd1 {The position is equal.} O-O 9. Nc3 {[#]} Nb4 $146 ({Predecessor:} 9... Be6 10. Nd5 Rc8 11. c3 Re8 12. Qf4 Qa5 13. Qh4 Nxd5 14. exd5 Bxd5 15. b4 Bxf3 16. bxa5 Bxe2 {1/2-1/2 (33) Esipenko,A (2677)-Vachier Lagrave,M (2784) Wijk aan Zee 2021}) 10. Qd2 Be6 11. a3 Nc6 12. Qf4 Rc8 13. Qh4 Qb6 14. Ng5 Ne5 15. Kh1 h6 (15... h5 {is interesting.} 16. Nxe6 fxe6 17. Rf1 g5 18. Bxg5 Qxb2 19. Nb5 Ng6) 16. Nxe6 fxe6 17. Qh3 {[%mdl 8192] [#]} (17. Rf1 $14 {stays ahead. }) 17... Rxc3 $1 $19 {[%mdl 512]} 18. bxc3 {Threatens to win with Be3.} (18. Qxc3 Nxe4) 18... Nxe4 $2 ({Better is} 18... Qxf2 $19 19. Bd3 (19. Qxe6+ $2 Kh8 $19) 19... Nfg4) 19. Qxe6+ $11 Kh8 (19... Kh7 $5 20. Be3 $8 Nxf2+ 21. Bxf2 Rxf2 $11) 20. Be3 Nxf2+ 21. Bxf2 Qxf2 22. Bd3 {aiming for Rf1.} Rf6 23. Qh3 Qc5 24. Rf1 (24. Rab1 {with more complications.} b6 25. Rf1 h5 26. Be2 Kh7 27. a4) 24... Qxc3 25. Rxf6 exf6 (25... Qxa1+ {feels hotter.} 26. Rf1 Qxa3 27. Qc8+ Kh7 28. Be4 Qe3) 26. Rb1 b6 27. a4 Qc5 28. Qg3 f5 29. h3 Kh7 30. Qf4 Nxd3 31. cxd3 {[%mdl 4096] Endgame KQR-KQB} Qc2 32. Rc1 Qxd3 33. Rc7 g5 34. Qf3 Qb1+ 35. Kh2 {Threatening mate with Qc3.} Kg6 $1 {...Bd4 is the strong threat.} 36. g4 { Strongly threatening gxf5+.} Be5+ (36... Bd4 {seems wilder.} 37. Qxf5+ Qxf5 38. gxf5+ Kxf5 39. Rf7+ Ke4) 37. Kg2 Qb2+ (37... a5 {keeps more tension.} 38. gxf5+ Qxf5 39. Qxf5+ Kxf5 40. Rc6 h5) 38. Qf2 Qxf2+ 39. Kxf2 {KR-KB} a5 40. Ke3 h5 41. Kf3 (41. gxh5+ {looks sharper.} Kxh5 42. Rh7+ Kg6 43. Rb7 Bh2 44. Kf2) 41... fxg4+ 42. hxg4 h4 $2 {[%mdl 8192]} (42... hxg4+ $11 {and Black is okay.} 43. Kxg4 Bd4) 43. Rc6 $18 Kf6 44. Rxb6 Ke6 45. Rb5 h3 $2 (45... Kd7 46. Rxa5 Kc6) 46. Rxa5 h2 47. Kg2 Kd7 {[#]} 48. Rxe5 $1 {[%mdl 512] White mates.} dxe5 49. Kxh2 {KPP-KPP} Kc6 50. Kg3 Kc5 51. a5 e4 52. Kf2 Kb5 53. Ke3 Kxa5 54. Kxe4 Kb5 55. Kf5 Kc5 56. Kxg5 {Never resign too early! Weighted Error Value: White=0.14/Black=0.35} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "8.4"] [White "Khademalsharieh, Sarasadat"] [Black "Saduakassova, Dinara"] [Result "1-0"] [ECO "E15"] [WhiteElo "2494"] [BlackElo "2500"] [Annotator "TA"] [PlyCount "153"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 16,153,16,18,10,0,15,-16,-2,-41,0,-19,-12,-15,0,-22,0,0,0,0,13,-6,0,-45, 0,0,0,0,0,0,0,0,3,14,6,0,0,-33,-34,-57,-79,-106,2,0,2,2,0,6,3,6,88,81,103,95, 124,120,120,118,136,131,246,245,243,238,319,319,290,122,122,122,122,122,122, 122,122,115,115,115,115,103,118,103,103,103,115,115,115,115,115,115,115,72,72, 32,9179,101,1190,419,12810,102,109,109,12833,12833,12827,12823,5292,1821,12835, 12835,12836,12835,12837,12836,12836,12833,12832,12833,12834,12835,12836,12836, 12840,12840,12841,12841,12841,12842,12842,12843,12844,12843,12845,12843,12848, 12848,12849,12849,12850,12849]} 1. d4 Nf6 2. Nf3 e6 3. c4 b6 4. g3 Ba6 5. Nbd2 d5 6. cxd5 exd5 7. Bg2 Be7 8. O-O O-O 9. Ne5 Bb7 {E15: Queen's Indian: 4 g3 sidelines, 4 g3 Ba6 and 4 g3 Bb7 early deviations.} 10. Ndf3 c5 11. dxc5 bxc5 { [#] The position is equal.} 12. Nd3 $146 ({Predecessor:} 12. Be3 Nbd7 13. Nxd7 Qxd7 14. Rc1 Rac8 15. Ne5 Qb5 {1/2-1/2 (15) Gagunashvili,M (2598)-Ponomariov,R (2749) Khanty-Mansiysk 2010}) 12... Ne4 13. Bf4 Qb6 14. Rc1 Nc6 15. Nfe5 Rfd8 16. Nxc6 Bxc6 17. Qc2 Rac8 18. Ne5 Bb7 19. Rfd1 Nf6 20. Bh3 Ra8 21. Bg2 Rac8 22. Bh3 Ra8 23. Bg5 Bc8 24. Bg2 Be6 25. b3 Rac8 26. e3 h6 27. Bxf6 Bxf6 28. Nd3 c4 ({Black should play} 28... g5 $17 {...Bg4 is the strong threat.} 29. Rb1 ( 29. Nxc5 $2 Be7 $19) 29... Qa5) 29. Nf4 $11 {[%CAl Rf4d5]} cxb3 30. Qxb3 Qxb3 31. axb3 Rxc1 32. Rxc1 Rb8 (32... d4 $11 {keeps the balance.}) 33. Bxd5 $16 Bxd5 34. Nxd5 Rxb3 {[%mdl 4096] Endgame KRB-KRN} 35. Rc8+ Kh7 36. Rc7 Kg8 37. Rxa7 Be5 (37... Bc3 $16 38. Kg2 g6 39. Nxc3 Rxc3) 38. Ne7+ $1 $18 Kh7 39. Nc6 f6 40. Nxe5 fxe5 {KR-KR} 41. Re7 (41. Ra5 $1 $18 {is the precise move to win.}) 41... Rb5 $16 42. Kg2 Kg6 43. g4 Kf6 44. Re8 Rb2 45. Kg3 Ra2 46. Rf8+ Ke7 47. Rf5 (47. Rb8 {feels hotter.} Ra4 48. Rb6 Kf7 49. Rb5 Kf6 50. Kf3) 47... Ke6 48. h4 Ra1 49. h5 Ra4 50. Rf8 Ke7 51. Rb8 Ra6 52. Rb7+ Kf6 53. f4 exf4+ 54. Kxf4 Ra1 $2 {[%mdl 8192]} (54... g6 $14) 55. Rb6+ $18 Kf7 $2 {[%mdl 8192]} (55... Ke7 $16 56. Rg6 Kf8) 56. e4 Rg1 {[#]} (56... Rf1+ $142 57. Ke5 Ke7) 57. Kf5 $2 (57. Rb7+ $1 $18 {and the rest is easy.} Kf8 58. e5) 57... Rf1+ $16 58. Ke5 Rg1 $2 {[%mdl 8192]} (58... Rf2 $16 59. Rb7+ Kf8) 59. Rb7+ $18 {White is clearly winning.} Kg8 60. Kf5 Rf1+ 61. Ke6 Rf4 62. e5 Rxg4 63. Rb8+ Kh7 64. Kd6 Rd4+ 65. Kc5 Re4 66. Kd5 Re1 {[#]} 67. e6 $1 Rd1+ 68. Kc6 Rc1+ 69. Kd7 Rd1+ 70. Ke8 g6 71. Rb7+ Kg8 72. hxg6 h5 73. Rd7 Ra1 74. e7 h4 75. Kd8 {[%CAl Re7e8]} Ra8+ 76. Kc7 {Rd8+ would kill now.} Ra7+ 77. Kb6 {[%CAl Re7e8] Weighted Error Value: White=0.24/Black=0.19} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "8.3"] [White "Liang, Awonder"] [Black "Yoo, Christopher Woojin"] [Result "0-1"] [ECO "A14"] [WhiteElo "2592"] [BlackElo "2457"] [Annotator "TA"] [PlyCount "72"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 23,72,5,0,0,11,0,-4,0,0,-18,0,0,0,0,0,0,0,0,0,-25,-23,-264,-241,-240, -188,-167,-165,-247,-236,-283,-92,-95,-87,-80,-73,-166,0,0,45,-1497,-1464, -1951,-1011,-1624,-1611,-1618,-1615,-1614,-1584,-1614,-1593]} 1. Nf3 Nf6 2. c4 e6 3. b3 d5 4. Bb2 Be7 5. g3 O-O 6. Bg2 b6 7. O-O Bb7 8. e3 Nbd7 9. Qe2 c5 10. Nc3 Rc8 11. Rac1 Qc7 12. Rfd1 {has lost popularity (12.cxd5).} Qb8 13. cxd5 { A14: English Opening: 1...e6 with b3 by White.} Nxd5 {[#]} 14. a3 $146 ({ Predecessor:} 14. Nxd5 Bxd5 15. e4 Bb7 16. d4 cxd4 17. Nxd4 Rxc1 18. Rxc1 Rc8 19. Rd1 Nc5 20. e5 a6 {0-1 (49) Iturrizaga Bonelli,E (2651)-Terry,R (2757) Chess.com INT 2017}) 14... Qa8 15. Ne4 {The position is equal.} Rfd8 16. d3 a5 17. a4 Nb4 18. Nfg5 h6 19. Nxe6 fxe6 20. Qg4 {[%csl Gb2][%CAl Rg4g7][%mdl 64] [#] Double Attack} e5 21. Qe6+ Kf8 22. f4 $2 (22. Qf5+ $1 $11 {and White is okay.} Kg8 23. Qe6+ Kf8 24. Qf5+ Kg8 25. Qe6+) 22... Bd5 $19 23. Qg4 Qc6 24. fxe5 {aiming for Rf1+.} Qe6 25. Qh5 (25. Rf1+ {was worth a try.} Kg8 26. Nf6+ Kh8 27. Bxd5 Qxg4 28. Nxg4 Nxd5 29. e4) 25... Kg8 (25... Bxb3 26. Bh3 $16) 26. Rf1 {And now Bh3 would win.} Bxe4 $2 (26... Bxb3 27. Bh3 $11) (26... Rc6 $19 { and Black stays clearly on top.} 27. d4 cxd4 {[%mdl 64] Overworked Piece} 28. Bxd4 Rxc1 29. Rxc1 Nd3) 27. Bxe4 $17 {Bf5 is the strong threat.} Bg5 28. Bf5 Qe7 ({Much worse is} 28... Bxe3+ 29. Kh1 $11) ({But not} 28... Qxb3 $2 {[#]} 29. e6 $1 $18) 29. Rce1 (29. e6 $17 Nf8 30. Rce1 (30. Qf7+ $2 Qxf7 31. exf7+ { [%mdl 64] Discovered Attack} Kh8 $19)) 29... Nc2 $2 (29... Nxe5 $19 30. h4 (30. Bxc8 $2 Rxc8 31. h4 Nbxd3 $17) 30... Nbxd3 31. hxg5 Nxb2 32. Bxc8 Rxc8) 30. e6 $1 $11 {[%CAl Re6d7]} Nxe1 31. Bh7+ $2 {[%mdl 8192]} Kxh7 $19 {Black is clearly winning.} 32. Rf7 Nf6 33. Qh3 Qe8 34. Qf5+ Kh8 35. Qg6 Qg8 36. e7 Re8 { Weighted Error Value: White=0.86/Black=0.46} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "8.2"] [White "Salimova, Nurgyul"] [Black "Gukesh D"] [Result "0-1"] [ECO "E04"] [WhiteElo "2395"] [BlackElo "2578"] [Annotator "TA"] [PlyCount "90"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 11,89,15,17,13,19,23,28,6,79,70,81,81,74,77,76,82,115,99,94,22,11,13,77, 82,88,89,112,89,80,93,96,88,106,104,123,120,113,107,155,148,214,93,113,107,110, 104,108,138,129,134,127,81,82,80,93,93,94,93,95,54,68,49,118,120,161,0,205,190, 231,217,233,-200,214,-209,-216,-29996,-29994,-29994,-29989,-29999]} 1. Nf3 Nf6 2. d4 d5 3. c4 e6 4. g3 dxc4 5. Bg2 a6 6. O-O Nc6 7. Nbd2 {E04: Open Catalan: 5 Nf3.} b5 8. b3 {outshines the older 8.Ne5.} c3 9. Nb1 {[#] Black must now prevent Ne5.White has an edge.} c2 $146 (9... b4 $11 {remains equal.}) ({ Predecessor:} 9... b4 10. a3 Rb8 11. axb4 Bxb4 12. Qd3 e5 13. Nxe5 Nxe5 14. dxe5 Qxd3 15. exd3 Nd7 {1/2-1/2 (109) Fridman,D (2601)-Ter Sahakyan,S (2640) Lichess.org INT 2020}) 10. Qxc2 $16 Bb7 11. a3 Be7 (11... Nxd4 $2 12. Nxd4 Bxg2 13. Kxg2 $18) 12. Bb2 O-O 13. Nbd2 h6 14. Rac1 Rc8 15. e3 (15. Ne1 $16 Nxd4 16. Bxd4 Bxg2 17. Bxf6 Bxf1 18. Bxe7 Qxe7 19. Kxf1) 15... Nb8 $11 16. b4 Nbd7 ( 16... a5 $1 $11) 17. Nb3 Be4 18. Qe2 Nb6 19. Nfd2 Bxg2 20. Kxg2 c6 21. Rc2 Qd7 22. Rfc1 Rc7 23. Na5 Rfc8 24. Qf3 Nbd5 25. Ndb3 Ne8 (25... Qe8 $16 26. e4 Nb6) 26. Rd1 (26. e4 $18 {and the rest is easy.}) 26... f5 27. e4 fxe4 28. Qxe4 Nef6 29. Qe2 Bd6 30. Re1 Re8 31. Nc5 Bxc5 32. Rxc5 Kf7 33. Rec1 {[%CAl Ra5c6]} Rec8 34. Qf3 Kg8 35. R1c2 Qe8 36. Bc1 Kh8 ({Black should play} 36... Nd7 $14) 37. Bf4 $16 Rf7 38. Rxc6 $2 (38. Nxc6 $18 Ra8 39. Re2) 38... Rd8 $2 (38... Rxc6 $11 {and Black stays safe.} 39. Rxc6 (39. Nxc6 Nd7 $11) 39... Nd7) 39. Be5 $18 (39. Rxa6 Nh7 $11) 39... Rf8 {intending ...Qg6.} 40. Qe2 ({Weaker is} 40. Rxa6 Qg6 $17) 40... Qg6 {...Ng4 is the strong threat.} 41. Rc1 $4 {[%mdl 8192]} ({ Worse is} 41. Rxa6 Ng4 $17) (41. Rxe6 $18 Rde8 42. Rcc6 (42. Rxa6 $2 Rxe5 { [%mdl 64] Deflection} 43. Qxe5 Qxc2 $19)) 41... Qf5 $4 {[%mdl 8192]} (41... Ng4 $19 {and life is good for Black.} 42. f3 Nxe5 43. Qxe5 Nf4+ 44. Kh1 Nd3 { [%mdl 64] Double Attack, Discovered Attack}) 42. Qc2 {[%mdl 8192]} (42. Nb7 $18 Ra8 43. Qf3) 42... Ne4 $19 {[%mdl 1024] ( -> ...Qf3+). Black has strong compensation.} 43. Rf1 $2 (43. Qe2 $19 Qxf2+ 44. Qxf2 Rxf2+ 45. Kh1) 43... Qf3+ {Black mates.} 44. Kg1 {[#]} Ne3 $1 {[%csl Ge3][%CAl Rf3g2][%mdl 576] Double Attack, Pin} 45. Qb1 (45. Qxe4 Qxe4) 45... Qg2# {Weighted Error Value: White=0. 65/Black=0.42} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "8.1"] [White "Keymer, Vincent"] [Black "Badelka, Olga"] [Result "1-0"] [ECO "D24"] [WhiteElo "2591"] [BlackElo "2418"] [Annotator "TA"] [PlyCount "65"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,65,21,47,48,35,42,42,42,47,36,48,31,58,48,58,71,65,15,29,35,14,11,24, -18,0,0,28,28,26,27,35,27,27,27,89,93,87,91,83,95,143,120,123,46,55,61,168,152, 210,216,214,182,204,206,202,106,564,543]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 dxc4 5. e4 b5 6. e5 {D24: Queen's Gambit Accepted: 3 Nf3 Nf6 4 Nc3.} Nd5 7. Nxb5 Nb6 8. Be2 {White is slightly better.} Nc6 {8...Nc6 is better than 8... Be7.} 9. O-O Be7 10. Qd2 Bb7 11. Qf4 a6 12. Nc3 g5 13. Nxg5 (13. Qe4 {with more complications.} Rb8 14. Be3 Nb4 15. Qb1 N4d5 16. Nxd5 Qxd5 17. Qc2) 13... Bxg5 14. Qxg5 Qxg5 15. Bxg5 {Rfd1 is the strong threat.} Nxd4 {[#] And now ... Rg8 would win.} 16. h4 (16. f4 {looks sharper.} h6 17. Bh4 Nxe2+ 18. Nxe2 a5 19. Nc3) 16... Rg8 {Threatens to win with ...h6!} 17. f3 {[#]} Nxe2+ $146 ( 17... Nd7 {feels hotter.} 18. Bf4 Nc5 19. Bg5 Nd7) ({Predecessor:} 17... Nd7 18. Rad1 Nxe2+ 19. Nxe2 Nxe5 20. Kh2 Bd5 21. Nf4 Nd3 22. Nxd3 cxd3 23. b3 a5 24. Rxd3 {1/2-1/2 (32) Aleksandrov,A (2571)-Esipenko,A (2625) Minsk 2019}) 18. Nxe2 Nd7 19. Bf4 O-O-O 20. Rac1 Nb6 21. Be3 Rd3 (21... Rd5 $11) 22. Bxb6 $16 cxb6 23. Rxc4+ Kb8 24. Rf4 $36 {[%mdl 2048] White is in control.} Rd2 {[#]} 25. Rf2 Rxb2 26. Nd4 (26. Rxf7 $16 {aiming for Nd4.} Rxa2 27. Nf4 (27. Rxh7 Bxf3 28. Nf4 Ra1+ 29. Kh2 Bg4 $16) 27... Ra1+ 28. Kh2) 26... Rxf2 27. Kxf2 $14 { [%mdl 4096] Endgame KRB-KRN} Rg7 (27... Rd8 $14) 28. g4 h6 (28... Kc8 $16 29. a3 Bd5) 29. Rf6 Rh7 30. f4 Kc7 31. Kg3 Kd7 32. f5 (32. g5 $18 hxg5 33. fxg5) 32... Ke7 $2 {[%mdl 8192]} (32... Bd5 $16) 33. fxe6 {Weighted Error Value: White=0.12/Black=0.42} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "7.10"] [White "Gukesh D"] [Black "Badelka, Olga"] [Result "1-0"] [ECO "C00"] [WhiteElo "2578"] [BlackElo "2418"] [Annotator "TA"] [PlyCount "55"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 16,55,0,-23,-6,-33,-34,-27,-33,-49,-19,-28,0,-22,59,59,59,62,85,72,96, 68,86,47,38,66,112,110,166,164,141,145,401,361,482,284,556,549,1498,1479,29995, 29996]} 1. Nf3 Nf6 2. g3 e6 3. Bg2 d5 4. O-O Be7 5. d3 O-O 6. Nbd2 c5 7. e4 Nc6 8. Re1 Qc7 9. Qe2 Rd8 {C00: French: Unusual White 2nd moves.} 10. e5 Nd7 11. Nf1 b5 {[%CAl Bb7b5,Bb5b4][%mdl 32] Black has an edge.} 12. Bf4 b4 13. h4 a5 { [#]} 14. h5 $146 ({Predecessor:} 14. Ne3) 14... Ba6 (14... h6 $1 $11) 15. h6 $14 g6 16. Ne3 Nf8 17. Ng4 a4 18. Qe3 Nd4 19. Rac1 Nf5 20. Qd2 c4 21. Bg5 c3 ( 21... Bxg5 $16 22. Qxg5 (22. Nxg5 Nd7 $14) 22... Nd7) 22. bxc3 $18 bxc3 23. Qf4 {Threatens to win with Bxe7.} Kh8 $2 {[%mdl 8192] This costs Black the game.} ( 23... Bxg5 $16 24. Nxg5 Nd7) 24. Nf6 Nd7 {[#] ...Nxf6 would now be nice for Black.} 25. Nxh7 Kxh7 $2 (25... Qc5 {might work better.} 26. Bxe7 Qxe7) 26. Bxe7 Nxe5 27. Ng5+ ({Less strong is} 27. Nxe5 Qxe7 28. Bh3 Bb7 $16) 27... Kh8 28. Bf6+ {[%mdl 64] Double Attack. Weighted Error Value: White=0.26/Black=0.93} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "7.9"] [White "Yoo, Christopher Woojin"] [Black "Salimova, Nurgyul"] [Result "1-0"] [ECO "E01"] [WhiteElo "2457"] [BlackElo "2395"] [Annotator "TA"] [PlyCount "101"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 15,101,-13,2,-17,-11,-14,0,-9,0,-31,-24,-78,-28,-14,-18,-25,-28,-21,-24, -35,17,16,41,39,86,83,86,76,84,64,61,54,154,165,154,144,219,214,207,188,219, 199,226,64,76,73,103,70,114,0,0,0,0,0,0,0,67,0,330,340,385,338,453,435,900,899, 1106,1145,1218,1180,29984,29985,29985,29986,29986,29987,29987,29988,29991, 29992,29992,29993,29993,29994,29997,29998,29998,29999]} 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. g3 dxc4 6. Bg2 Nbd7 7. O-O b5 8. e4 Bb7 9. a4 {E01: Catalan: Early deviations.} b4 10. e5 {[#]} Nd5 $146 ({Predecessor:} 10... bxc3 11. exf6 cxb2 12. fxg7 Bxg7 13. Bxb2 c5 14. Qc2 Bxf3 15. Bxf3 Rb8 16. Rfd1 O-O 17. Ra2 cxd4 18. Bxd4 Qc7 19. Qc1 Rfc8 20. Rc2 Ne5 {1/2-1/2 (20) Splichal,S (2342)-Sykora,J (2357) ICCF email 2017}) 11. Ne4 {The position is equal.} h6 12. Re1 a5 13. Bf1 (13. Nfd2 $11 {remains equal.} Ba6 14. Bf1) 13... N7b6 14. Nfd2 Ba6 15. Nc5 Bxc5 16. dxc5 Nd7 17. Qg4 Qe7 (17... c3 $15 18. Qxg7 Ke7 19. bxc3 Bxf1 20. Kxf1 (20. Nxf1 Qg8 $15) 20... Nxc3) 18. Qxg7 $11 O-O-O 19. Ne4 $1 Kb8 {[#] ...Rdg8 is the strong threat.} 20. Nd6 $1 {[%mdl 64] Double Attack} Nxc5 21. Qxf7 Nd3 22. Qxe7 Nxe7 23. Re4 Rhf8 ({Better is} 23... Nf5 $14) 24. Bxh6 Rg8 25. Be3 Nd5 (25... Nf5 $16 {might work better.}) 26. Bxd3 $18 ({Resist } 26. Nxc4 $6 Bxc4 27. Rxc4 Nxe3 $14) 26... cxd3 27. Bd2 Rd7 28. Rc1 Rc7 29. h4 $2 (29. Rc5 $18) 29... c5 $14 30. h5 Nb6 31. b3 c4 32. Nxc4 (32. bxc4 $16 Nxa4 33. Rb1) 32... Bxc4 $11 33. bxc4 {aiming for c5.} Nxa4 34. Rb1 Nc5 35. Rh4 Rb7 (35... Kb7 $11) 36. h6 (36. Kg2 $1 $14) 36... b3 $2 {[%mdl 8192] White now steadily converts the win.} (36... a4 $1 $11 {and Black has nothing to worry.} 37. Rxb4 a3) 37. Bxa5 $18 b2 38. Bd2 Rh8 39. Rd4 Rb3 (39... Kc7 $142 40. g4 Kc8 ) 40. g4 Kc7 41. g5 Ra8 42. h7 Ra1 {[#]} 43. h8=Q $1 {[%mdl 512] White mates.} Rxb1+ 44. Kg2 Rg1+ 45. Kxg1 b1=Q+ 46. Kg2 Rb8 47. Qg7+ Kc8 48. Qf8+ {[%mdl 64] Double Attack} Kb7 49. Qxc5 Rh8 50. Rd7+ Kb8 51. Qc7+ {Weighted Error Value: White=0.18/Black=0.60} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "7.8"] [White "Saduakassova, Dinara"] [Black "Liang, Awonder"] [Result "1-0"] [ECO "E62"] [WhiteElo "2500"] [BlackElo "2592"] [Annotator "TA"] [PlyCount "93"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 19,93,25,28,17,33,0,0,0,0,-3,0,-20,8,6,0,0,15,8,14,0,31,18,24,0,114,-62, -71,-69,-73,-68,-70,-80,-79,-79,-60,-93,-100,-95,-5,-7,0,-7,0,0,-6,-11,0,-27, -28,-36,-8,-17,8,-6,0,-7,0,-16,0,0,0,0,0,0,0,-6,0,0,0,0,0,0,325,302,871,872]} 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. g3 O-O 5. Bg2 d6 6. Nc3 Bf5 7. Nh4 Bc8 8. Nf3 c6 9. O-O {9.b3 is the modern continuation.} Qa5 10. h3 e5 11. d5 {E62: King's Indian: Fianchetto: 6...c6 and Panno Variation (6...Nc6) without ...a6.} (11. dxe5 {is more complex.} dxe5 12. e4 Re8 13. Bd2 Qc7 14. Be3) 11... cxd5 {[#]} 12. Nxd5 $146 (12. cxd5 {looks sharper.} Nbd7 13. a4 Nc5 14. Nd2 Bd7 15. Ra3) ( {Predecessor:} 12. cxd5 b5 13. b4 Qxb4 14. Bd2 Qc4 15. a4 bxa4 16. Rxa4 Qc5 17. Qb3 Bd7 18. Rc4 Qb6 19. Qa3 a5 20. Rb1 {1-0 (30) Cano Gimenez,V (2259)-Ivanov, J (2384) Mutxamel 2019}) 12... Nxd5 13. Qxd5 {The position is equal.} Qxd5 14. cxd5 Na6 15. Bg5 Re8 16. e4 Bd7 17. Nd2 Rac8 (17... f6 $5 18. Be3 $8 Rec8 $11) 18. Rfc1 f5 19. Be3 b6 20. Bf1 Nc5 21. b4 f4 22. gxf4 $2 ({Only move:} 22. Bxc5 $16 bxc5 23. bxc5 dxc5 24. gxf4) 22... exf4 $15 {[%mdl 64] Discovered Attack} 23. Bxf4 Nxe4 24. Rxc8 Rxc8 ({Don't play} 24... Bxc8 25. Re1 $11) 25. Re1 Nxd2 26. Bxd2 Kf7 27. Bf4 Bc3 {[%mdl 64] Double Attack} 28. Rb1 {[#]} Bf5 (28... Be5 $1 $17 {[%CAl Re5f4]} 29. Bxe5 dxe5) 29. Rb3 $11 Ke7 30. Bg5+ Bf6 31. Re3+ Kf7 32. Bf4 Be7 33. Bb5 Rc1+ 34. Kg2 {aiming for Rxe7+!} Rb1 35. a3 Rb2 36. Rc3 Be4+ 37. Kg3 g5 38. Be3 Rb1 {White must now prevent ...Rg1+.} 39. f3 Bxd5 40. Rc7 h6 {And now ...Rb3 would win.} 41. Rxa7 Rb3 42. Kf2 Rb2+ 43. Kg3 Kf8 44. Bd4 Rd2 45. Bg7+ Kf7 $2 {[%mdl 8192]} (45... Kxg7 $11 {and Black is okay.} 46. Rxe7+ Kf6) 46. Bxh6 $18 Ke6 $2 {[#]} (46... Rd1 47. Be2 Ra1 48. Bxg5 Rg1+ 49. Kf4 Rxg5) 47. Rxe7+ $1 {[%mdl 512] Weighted Error Value: White=0.17/Black=0.33} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "7.7"] [White "Mammadzada, Gunay"] [Black "Khademalsharieh, Sarasadat"] [Result "1-0"] [ECO "C78"] [WhiteElo "2443"] [BlackElo "2494"] [Annotator "TA"] [PlyCount "57"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 17,57,34,39,16,9,9,23,14,9,16,12,17,154,150,164,173,164,163,160,147,154, 152,178,123,329,343,391,220,548,518,482,440,706,543,759,760,759,737,720,704, 648,631]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bc5 7. c3 d6 8. d4 Bb6 9. a4 Rb8 10. a5 $1 {[%mdl 4] is now more promising than 10.axb5. C78: Ruy Lopez: Archangelsk and Möller Defences.} Ba7 ({Wrong is} 10... Bxa5 $2 11. dxe5 (11. d5 Ne7 $18) 11... dxe5 12. Qxd8+ Kxd8 13. Bd5 $18 (13. Bxf7 Bb6 $16)) 11. h3 Bb7 12. Be3 {Hoping for d5.White has an edge.} Nxe4 13. d5 Bxe3 14. dxc6 {[#] And now Qd5! would win.} Bxf2+ $146 (14... Nxf2 $1 $11 { keeps the balance.} 15. Qe2 Nxh3+ 16. Kh1 {[#]} Nf2+ $1 17. Rxf2 Bxf2) ({ Predecessor:} 14... Nxf2 15. Qd5 O-O 16. cxb7 Ne4+ 17. Kh2 Bf4+ 18. Kg1 Be3+ 19. Kh2 Bf4+ 20. Kg1 Be3+ {1/2-1/2 (20) Anton Guijarro,D (2675)-Grischuk,A (2777) chess24. com INT 2020}) 15. Rxf2 $16 Nxf2 16. Qd5 $40 {[%csl Gb3][%CAl Rd5f7][%mdl 128] Black is in trouble.} O-O 17. cxb7 c6 18. Qxc6 Nd3 19. Bd5 ( 19. Qxa6 Nc5 $17) 19... Nf4 20. Nbd2 (20. Qxa6 $18 Nxd5 21. Qc6) 20... Qf6 $2 ( 20... Nxd5 $16 {might work better.} 21. Qxd5 Qe7) 21. Qxa6 $18 Nxd5 22. Qxb5 ( 22. Qc6 $142 Nf4 23. a6) 22... Nf4 (22... Nc7 23. Qc6 Qe7) 23. a6 {White is clearly winning.} Qg6 {[%csl Gf4][%CAl Rg6g2]} 24. Qf1 Qg3 (24... h6 $142 25. Kh2 (25. a7 Rxb7 26. a8=Q Rxa8 $16) 25... Kh7) 25. Kh1 h5 26. a7 Rxb7 27. a8=Q Rxa8 28. Rxa8+ Kh7 29. Ne4 {White took control after the opening. Weighted Error Value: White=0.37/Black=0.67} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "7.6"] [White "Shuvalova, Polina"] [Black "Murzin, Volodar"] [Result "1/2-1/2"] [ECO "B13"] [WhiteElo "2489"] [BlackElo "2502"] [Annotator "TA"] [PlyCount "110"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 11,110,23,29,16,19,14,29,22,31,27,28,13,26,-7,38,38,38,38,47,33,32,33, 41,36,45,49,78,78,76,67,63,50,52,37,35,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, -14,-8,-66,0,0,0,0,70,0,0,0,0,0,0,0,0,-115,-109,-92,-93,-90,-48,-30,-27,-30, -45,-39,0,0,0,0,0,0,0,0,0,0,0,-20,0,0,0,0,0,0,0]} 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 Qc7 6. Ne2 Bg4 7. O-O {B13: Caro-Kann: Exchange Variation and Panov-Botvinnik Attack.} e6 8. Qe1 Nf6 $1 {[%mdl 4] is currently scoring better than 8...Bxe2.} 9. Bg5 {And now f3 would win.White has an edge.} h6 10. Bh4 {aiming for f3.} Bxe2 11. Qxe2 Bd6 {[#]} 12. Bg3 $146 (12. h3 { with more complications.} Bh2+ 13. Kh1 Bf4 14. Qf3 Nd7 15. Na3) ({Predecessor: } 12. h3 O-O-O 13. Na3 Qe7 14. Nc2 Rhg8 15. Ne3 g5 16. Bg3 h5 17. Rae1 h4 18. Be5 {0-1 (43) Kevlishvili,R (2463)-Donchenko,A (2600) Moscow 2019}) 12... h5 13. Bxd6 Qxd6 14. Nd2 {[%CAl Bb1d2,Bd2f3,Bf3g5][%mdl 32]} h4 15. a4 Nh5 16. Qe3 Qf4 17. Nf3 a6 18. Rae1 h3 19. g3 ({Much weaker is} 19. gxh3 $6 Qf6 $11) 19... Qxe3 20. fxe3 Nf6 21. Ng5 Ke7 22. e4 Rh5 23. exd5 Rxg5 24. dxc6 bxc6 25. Rf2 a5 26. Bf1 Rh5 27. Rd2 Rd8 28. Rde2 Rdd5 29. Ra1 c5 30. dxc5 Rxc5 31. Rd1 g5 32. Rd4 g4 33. Red2 Rhd5 34. Be2 {[#]} (34. b4 $11 axb4 35. cxb4) 34... Rxd4 (34... Ne4 $1 $15 35. Rxd5 exd5) 35. Rxd4 $15 {[%mdl 4096] Endgame KRB-KRN} e5 36. Rd1 Ke6 (36... Rc7 $11) 37. Kf2 (37. Rd8 $1 $14) 37... Ne4+ 38. Ke3 f5 39. Rd8 $1 Nd6 {Strongly threatening ...Nc4+.} 40. Ra8 Rd5 41. b4 (41. Rf8 $11) 41... axb4 $17 42. cxb4 Rd4 43. b5 f4+ 44. gxf4 Nf5+ 45. Kf2 {next fxe5 is good for White. } Rxf4+ 46. Kg1 $1 g3 (46... Rb4 {is interesting.} 47. Re8+ Kd6 48. Bd3 Nd4 49. a5 Rb2) 47. hxg3 {The position is equal.} h2+ {[%mdl 64] [#] Decoy} 48. Kxh2 Rf2+ {[%mdl 64] Double Attack} 49. Kh3 Rxe2 $11 {KRN-KR} 50. b6 Rb2 51. a5 { Threatens to win with a6.} Nd6 52. Kg4 Rb3 53. Rb8 {a6 is the strong threat.} Ra3 54. b7 {Black must now prevent Re8+!} Nxb7 55. Rxb7 Rxa5 {Weighted Error Value: White=0.11/Black=0.10} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "7.5"] [White "Abdumalik, Zhansaya"] [Black "Abdusattorov, Nodirbek"] [Result "0-1"] [ECO "B01"] [WhiteElo "2472"] [BlackElo "2634"] [Annotator "TA"] [PlyCount "70"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 15,70,8,16,16,18,5,10,7,10,12,14,16,10,-25,-19,-38,-36,-66,-42,-136,-96, -248,-251,-238,-240,-243,-246,-264,-256,-253,-261,-246,-252,-260,-266,-494, -482,-479,-486,-464,-476,-540,-491,-832,-343,-398,-332,-325,-310,-333,-334, -483,-477,-675,-713,-908,-900]} 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 Bf5 6. Be2 e6 7. O-O c6 8. Ne5 Nbd7 9. Nc4 {B01: Scandinavian Defence.} Qc7 10. g3 Nb6 11. Bf4 {The position is equal.} Qd8 12. Ne3 Bg6 13. h4 h6 {[#]} 14. h5 $146 ({Predecessor:} 14. a3 Be7 15. Bf3 O-O {1/2-1/2 (15) Vajda,L (2557) -Czebe,A (2513) Budapest 2011}) 14... Bh7 15. Re1 Bd6 16. Ng2 O-O 17. Qd2 ({ White should play} 17. Be5 $15) 17... Bb4 {White must now prevent ...Ne4.} 18. Bf3 $2 {White does not recover from this.} (18. Bd3 $17) 18... Nc4 $1 $19 { [%csl Bb2,Bd2][%mdl 64] [#] Double Attack} 19. Qc1 Qxd4 20. Rd1 Qc5 21. Na4 Qa5 22. a3 {[#]} Be7 (22... Qxa4 23. axb4 Qxb4 24. b3 $17) 23. b3 Ne5 24. Be2 Neg4 25. Ne3 $2 (25. f3 Bc5+ 26. Nxc5 Qxc5+ {[%mdl 64] Double Attack} 27. Be3 Nxe3 28. Qxe3 Qxc2 29. Rd2) 25... Qxh5 {( -> ...Qh2+)} 26. Nxg4 Nxg4 27. Bxg4 Qxg4 28. Rd7 Bf6 29. Rb1 (29. Qd1 $142 Bf5 30. Qxg4 Bxg4 31. Rad1) 29... Qf3 (29... e5 $142 30. Rxb7 Be4) 30. Qe3 Qxe3 31. Bxe3 b6 ({Much less strong is} 31... Bxc2 32. Rc1 $19) 32. Rc1 Rfd8 33. Rc7 (33. Rxd8+ $142 Rxd8 34. Kf1) 33... Be4 {Black is clearly winning.} 34. c4 (34. f4 $142) 34... Rd3 35. Re1 Bf3 { Weighted Error Value: White=0.66/Black=0.29} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "7.4"] [White "Lei, Tingjie"] [Black "Yip, Carissa"] [Result "0-1"] [ECO "A40"] [WhiteElo "2505"] [BlackElo "2430"] [Annotator "TA"] [PlyCount "110"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,109,14,39,32,46,42,56,50,68,68,61,63,63,56,73,22,9,0,23,0,0,0,0,0,0,0, 0,-14,0,-69,-25,-56,-15,-16,15,19,12,0,17,29,25,-220,-191,-295,-311,-272,-214, -410,-410,-387,-389,-384,-377,-762,-734,-746,-637,-635,-647,-631,-631,-590, -475,-422,-342,-452,-364,-586,-516,-511,-470,-573,0,-477,-452,-455,-464,-456, -440,-665,-663,-654,-647,-614,-601,-880,-873,-1035,-1021,-29995,0,-224,0, -29995,-29996,-29996,-29997,-29997,-29998,-29998,-29999,-29999]} 1. d4 g6 2. c4 Bg7 3. e4 e6 4. Nc3 Ne7 5. Nf3 d5 6. e5 {A40: Unusual replies to 1 d4.} c5 $1 { [%mdl 4] is recently more successful than 6...Nbc6.} 7. dxc5 Nd7 {[#]} 8. cxd5 $146 {White is slightly better.} ({Predecessor:} 8. Bg5 Nxe5 9. cxd5 exd5 10. Bb5+ N5c6 11. O-O O-O 12. Re1 h6 13. Bf4 Bg4 14. Bd6 {1/2-1/2 (53) Gupta,A (2611)-Anurag,M (2490) Majitar 2019}) 8... exd5 9. Bb5 O-O 10. O-O ({Wrong is} 10. Nxd5 $2 Nxd5 11. Bc4 Nb4 $19) 10... Nxc5 11. Bg5 {Hoping for Nxd5!} Be6 12. Rc1 (12. Qd4 $16 h6 {[#]} 13. Bxh6 $1 (13. Qxc5 hxg5 14. Nxg5 Bxe5 $14) 13... Bxh6 14. Qxc5) 12... a6 $11 13. Be2 Rc8 14. Bxe7 Qxe7 15. Nxd5 Qd8 16. Nc3 Qb6 17. Nd5 Qd8 18. Nc3 Qb6 19. b3 ({Better is} 19. Nd5 $11 Bxd5 20. Qxd5) 19... Rfd8 {[%mdl 1024] Black has compensation.} 20. Qc2 Bf5 21. Qb2 Qa7 22. Rfd1 b5 23. b4 Nd3 24. Bxd3 Bxd3 25. Rd2 $2 (25. Qd2 $11 {and White has nothing to worry.}) 25... Bh6 $19 {[%mdl 64] Skewer} 26. Re1 (26. h3 {might work better.}) 26... Bxd2 27. Qxd2 {[#]} Be4 $1 {[%mdl 512]} 28. Qf4 (28. Qg5 Ba8 29. Qh4) 28... Bxf3 (28... Rxc3 $2 29. Qxe4 Rc4 30. Qe2 $19) 29. Qxf3 Qd4 30. Ne4 Qxe5 31. h4 $2 (31. Kf1 Qxh2 32. g3) 31... f5 32. Qb3+ Kg7 33. f4 Qd4+ 34. Nf2 Re8 35. Rd1 Qa7 {Strongly threatening ...Re2.} 36. Qb2+ Kg8 37. Kh1 Rcd8 38. Rc1 ( 38. Rxd8 Rxd8 39. h5) 38... Qd4 39. Qb3+ Qd5 40. Qb2 Qd4 41. Qb3+ Kh8 42. Nh3 Re3 43. Qc2 Qd2 44. Qc7 (44. Qxd2 $142 Rxd2 45. Ng5) 44... Re1+ 45. Rxe1 Qxe1+ {[%mdl 4160] Endgame Double Attack. KQR-KQN} 46. Kh2 Rd1 {( -> ...Qh1+)} 47. Qc8+ Kg7 48. Qc7+ Kh6 49. Qc8 Kg7 $2 (49... Qh1+ {mates} 50. Kg3 Rd3+ 51. Kf2 Rd2+ {[%mdl 64] Double Attack} 52. Kf3 Qxg2+ 53. Ke3 Qe2#) 50. Qc7+ $1 Kh6 $2 ( 50... Kf8 $19 51. h5 Qh1+ 52. Kg3 Rd3+ 53. Kh4 Qe1+ 54. Kg5 Qd1 55. Qb8+ Kf7 56. Qb7+ Rd7) 51. Qc8 $1 Qh1+ {Black mates.} 52. Kg3 Rd3+ 53. Kf2 Rd2+ { [%mdl 64] Double Attack} 54. Ke3 Qe1+ {[%mdl 64] Double Attack} 55. Kf3 Rd3# { Weighted Error Value: White=0.66/Black=0.48} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "7.3"] [White "Bjerre, Jonas Buhl"] [Black "Nihal Sarin"] [Result "1/2-1/2"] [ECO "B01"] [WhiteElo "2542"] [BlackElo "2620"] [Annotator "TA"] [PlyCount "147"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,147,46,52,43,45,41,46,44,66,39,47,47,44,27,35,37,36,29,30,25,38,33,29, 29,31,24,35,8,35,29,31,19,39,27,34,30,29,34,41,27,40,41,38,25,45,21,47,47,89, 83,104,101,83,83,84,89,86,85,85,5,6,6,23,16,24,2,0,0,0,0,0,0,-1,-44,-45,-52, -42,-63,-55,-85,-40,-66,-39,-47,-39,-39,0,-39,-31,-39,-39,-39,-39,-39,-39,-67, -42,-46,-14,-17,0,-46,0,-50,0,0,0,-46,-46,-46,-46,-50,-50,-66,-50,-55,-50,-55, -50,-50,-50,-58,-50,-57,-46,-46,0,-57,-57,-58,-58,-58,-58,-58,-58,-65,-58,-65, 0,-65]} 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. d4 Nf6 5. Nf3 c6 6. g3 {B01: Scandinavian Defence.} Bg4 7. Bg2 e6 8. O-O {White is slightly better.} Be7 9. h3 Bxf3 10. Bxf3 O-O 11. Ne4 Nxe4 12. Bxe4 Nd7 13. c3 Nf6 14. Bg2 {[#]} Rfe8 $146 ({Predecessor:} 14... Rad8 15. Qb3 Qc7 16. Bf4 Qc8 17. Rad1 Nd5 18. Bc1 b5 19. Rfe1 Qd7 20. Qc2 a5 21. Be4 Nf6 22. Bf3 Nd5 23. Be4 Nf6 24. Bf3 Nd5 25. Be4 {1/2-1/2 (25) Banzea,A (2313)-Nevednichy,V (2529) Sovata 2018}) 15. Qb3 Qd7 16. Rd1 h6 17. c4 Rac8 18. Be3 a6 19. Qa4 Bd6 20. Rd2 Qe7 21. Rad1 Rcd8 22. Qb3 Rd7 23. a3 Rdd8 24. Qc3 Rc8 25. b4 Red8 26. Qb3 Rd7 27. Rb1 Bb8 28. a4 b5 29. Rc2 { [#] Hoping for cxb5.} Rdd8 30. Rbc1 {And now cxb5 would win.} Qd7 31. cxb5 cxb5 32. Bc6 Qe7 33. axb5 axb5 {[#]} 34. Bxb5 (34. Rc5 $1 $16) 34... Rxc2 $11 35. Rxc2 Nd5 36. Bd2 Bd6 {[%CAl Rd6b4]} 37. Bc6 (37. Rc4 {keeps more tension.} Rb8 38. Bc6 Nxb4 39. Be4 Qf8 40. Kg2) 37... Nxb4 38. Bxb4 Bxb4 39. Qc4 Qd6 40. Rb2 Rc8 41. d5 exd5 42. Qxb4 Qxc6 $15 {[%mdl 4096] Endgame KQR-KQR} 43. Rb1 Qe6 44. Qg4 Qe8 45. Rd1 Rd8 46. Qd4 Qe6 47. Kg2 h5 48. h4 (48. Qh4 $5 {[%CAl Rh4d8]} Qd6 49. Qxh5 $11) 48... Qf5 49. Rd2 f6 50. Rd3 Rd7 51. Rd2 Kf7 52. Rd3 Kg6 53. Rd2 Qe5 54. Qd3+ Qf5 55. Qd4 Kf7 56. Re2 Qg4 57. Qe3 {[%csl Ge2][%CAl Re3e8]} Kg6 58. Qd3+ Qf5 59. Qd4 Rb7 60. Rd2 Rb5 61. Kh2 Qe4 62. Qxe4+ dxe4 {KR-KR} 63. Kg2 Kf5 64. Rd7 g6 65. Re7 Re5 66. Ra7 Re6 67. Ra5+ Re5 68. Ra7 Rc5 69. Re7 Rc2 70. Kf1 Ra2 71. Re8 Ra6 72. Kg2 Re6 73. Ra8 Re5 74. Ra7 {Weighted Error Value: White=0.12/Black=0.10} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "7.2"] [White "Praggnanandhaa R"] [Black "Zhu, Jiner"] [Result "1-0"] [ECO "E51"] [WhiteElo "2608"] [BlackElo "2462"] [Annotator "TA"] [PlyCount "77"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 13,77,-12,-7,-7,22,12,6,0,18,20,51,35,50,15,16,0,0,0,0,0,0,0,0,0,0,-28, -33,-66,-59,-64,-68,-68,-60,-66,-64,-105,-106,-107,-95,-171,-110,-104,-109, -108,-112,-166,-4,-43,0,0,41,33,107,104,97,71,547,534,656,252,778,688,724,702, 1635,1514]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 d5 5. Nf3 O-O 6. Bd2 b6 7. cxd5 exd5 8. Rc1 {E51: Nimzo-Indian: Rubinstein: 4...0-0 5 Nf3 d5.} a6 9. Bd3 Bb7 10. O-O {The position is equal.} Nbd7 11. Ne5 Bd6 12. f4 Ne4 {[#]} 13. Bxe4 $1 $146 {[%mdl 8] A relevant novelty.} ({Predecessor:} 13. Be1 Ndf6 14. Bh4 Qe8 15. Qf3 c5 16. Bxf6 Nxf6 17. g4 Rd8 18. Rcd1 g6 19. g5 {1/2-1/2 (32) Giri,A (2764)-Radjabov,T (2765) chess24.com INT 2020}) 13... dxe4 14. Nxd7 Qxd7 15. f5 Rad8 16. Qg4 Rfe8 17. Be1 f6 18. Bg3 Bf8 19. Ne2 c5 20. b4 {[%CAl Rb4c5]} Rc8 ( {But not} 20... cxd4 $2 21. Rc7 $18) 21. bxc5 bxc5 22. h4 Qf7 23. h5 h6 24. Rfd1 Bd5 ({Much weaker is} 24... Qxa2 $6 25. d5 $11) 25. Bf4 {[#]} Kh8 $1 26. Nc3 (26. dxc5 $17 {was necessary.} Rxc5 27. Rxc5 Bxc5 28. Qg6 Bxa2 29. Ra1) 26... cxd4 $19 27. Rxd4 Bxa2 28. Nxa2 Qxa2 29. Rcd1 {[#]} (29. Qd1 $17) 29... Qf7 $2 (29... a5 $1 $19 {aiming for ...a4.} 30. R1d2 Qb3) 30. Ra1 Rc6 31. Qg6 $36 {[%mdl 2048] White has some pressure.} Qxg6 32. hxg6 Bc5 ({Black should play} 32... Rc5 $14) 33. Rda4 $16 Ra8 34. Rxe4 Kg8 $2 {[%mdl 8192] Loses the game.} (34... Bb6 $16 {is more resistant.}) 35. Rc1 $18 Rac8 {and if ...Bxe3+! works, Black does fine.} 36. Kh2 a5 $2 (36... Ba3 37. Rxc6 Rxc6 38. Re8+ Bf8) 37. Rec4 {White is clearly winning.} h5 38. Kh3 Kf8 {[#]} 39. Rxc5 $1 {[%mdl 576] Remove Defender. Weighted Error Value: White=0.11/Black=0.49} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "7.1"] [White "Mendonca, Leon Luke"] [Black "Keymer, Vincent"] [Result "0-1"] [ECO "D41"] [WhiteElo "2549"] [BlackElo "2591"] [Annotator "TA"] [PlyCount "58"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 10,58,58,24,5,0,0,1,10,-18,0,0,0,-16,0,0,7,7,-4,-13,0,-72,-41,-60,-37, -86,-89,-85,-84,-96,-89,-99,-68,-83,-86,-122,-111,-111,-56,-85,-85,-89,-89,-94, -106,-574,-567,-560,-560,-560,-555]} 1. d4 Nf6 2. Nf3 e6 3. c4 d5 4. Nc3 c5 5. cxd5 Nxd5 6. e3 cxd4 {D41: Queen's Gambit Declined: Semi-Tarrasch with 5 cxd5.} 7. exd4 Nxc3 8. bxc3 Qc7 {The position is equal.} 9. Rb1 Nd7 10. c4 b6 11. Bd3 Bb7 12. O-O {[#]} Be7 $146 ({Predecessor:} 12... Bd6 13. Rb5 h6 14. Re1 a6 15. Rh5 Nf6 16. Rh4 Kf8 17. Ne5 Rd8 18. Qe2 Kg8 {1-0 (44) Salem,A (2682)-Barp,A (2374) Chess.com INT 2020}) 13. Re1 O-O 14. h4 Rfd8 15. d5 (15. Bb2 $11 { remains equal.}) 15... Nf8 $17 16. Qe2 Bf6 17. Bg5 Bxg5 18. Nxg5 {[%CAl Rd5e6]} exd5 19. cxd5 Bxd5 20. Rbc1 Qf4 21. g3 Qf6 22. Bb1 h6 23. Ne4 Bxe4 (23... Qe6 $17 24. Nc3 Qxe2 25. Nxe2 Ne6) 24. Qxe4 {[#]} Rd2 $1 25. Qe3 (25. Re2 Rxe2) 25... Rad8 26. Re2 Qb2 27. Rce1 {[%mdl 8192] [#]} (27. Ree1 $17 {was the crucial defense.}) 27... Rxe2 $1 $19 {Black is clearly winning.} 28. Qxe2 Qxe2 29. Rxe2 Rd1+ {[%mdl 64] Double Attack. Weighted Error Value: White=0.57/ Black=0.06} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "6.10"] [White "Zhu, Jiner"] [Black "Mendonca, Leon Luke"] [Result "0-1"] [ECO "B90"] [WhiteElo "2462"] [BlackElo "2549"] [Annotator "TA"] [PlyCount "108"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 17,108,13,17,0,0,3,14,0,8,0,6,0,10,0,68,67,76,67,72,64,136,142,139,121, 112,17,15,0,0,0,0,-122,-130,-144,-135,-146,-145,-202,-139,-139,-150,-159,-142, -222,-183,-535,-520,-486,-473,-543,-543,-688,-688,-688,-650,-675,-584,-669, -654,-1811,-1783,-2654,-2067,-3015,-2704,-3545,-1008,-692,0,-2612,-2331,-1972, -1576,-1518,-1464,-29972,-29974,-29973,-29974,-29978,-29978,-29978,-29979, -29979,-29979,-29979,-29978,-29978,-29979,-29979,-29980,-29980,-29982]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nf3 Be7 8. Bc4 O-O 9. O-O Be6 10. Qe2 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.} (10. Bb3 {looks sharper.} Nc6 11. Qe2 Rc8 12. Rfd1 Qc7 13. Rac1) 10... Bxc4 {was the old line (10...b5).} 11. Qxc4 b5 12. Qe2 {The position is equal.} Nbd7 13. a3 {[#]} Rc8 $146 ({Predecessor:} 13... Nb6 14. Bxb6 Qxb6 15. Rad1 Rfd8 16. Nd5 Nxd5 17. Rxd5 Rac8 18. Rfd1 Qc6 19. c3 Qc4 20. Qxc4 bxc4 21. Ra5 Rc6 22. h3 Rb8 23. Rb1 h6 24. Nd2 Bg5 25. Nf3 Be7 {1/2-1/2 (24) Regorda,M (1882)-Bartoli,F (1572) Bratto 2006}) 14. Bg5 Qb6 15. Rfd1 Rc4 (15... Qb7 $11) 16. Nd2 $14 {[#] Strongly threatening Bxf6.} Rc7 17. Nf1 Rfc8 18. Ne3 Rxc3 ( 18... Qb7 $14) 19. bxc3 $16 Rxc3 20. Bxf6 Nxf6 21. Nd5 (21. Rd3 $16 Rc8 22. a4) 21... Nxd5 $11 22. Rxd5 Qc6 23. Ra2 Rc4 24. Qd1 (24. Qd3 $11 {remains equal.}) 24... Rxe4 $17 {Hoping for ...Qxd5!} 25. Rd3 g6 26. c3 Rc4 27. Qd2 (27. Rad2 $17) 27... Kg7 $40 {[%mdl 128] Black wants a kill.} 28. Ra1 h5 29. Rd1 Qc5 30. Rf3 (30. Ra1 $17) 30... Ra4 ({Don't do} 30... Qxa3 31. Qd5 $17) 31. h3 $2 (31. Rd3 {is a better chance.}) 31... e4 $19 32. Rg3 Bh4 33. Re3 Bg5 {[%mdl 64] [#] Skewer} 34. Qxd6 Qxd6 35. Rxd6 Bxe3 36. fxe3 Rxa3 {[%mdl 4096] Endgame KR-KR} 37. Kf2 Rxc3 38. Rxa6 h4 39. Rb6 Rc2+ 40. Kg1 Rb2 41. Kf1 Kf8 (41... f5 $142 42. Rb7+ Kh6) 42. Rb7 Kg7 (42... b4 $142 43. Rb5 Kg7) 43. Rb6 $1 b4 {[%CAl Bb5b4,Bb4b3,Bb3b2][%mdl 32]} 44. Kg1 b3 45. Kf1 Rb1+ 46. Kf2 b2 {Black mates.} 47. Rb7 g5 48. Rb6 f5 49. Rb5 Kf6 50. Rb6+ Ke7 51. Rb7+ Ke6 52. Rb6+ Kd7 53. Rb7+ Kc6 54. Rb8 f4 {Weighted Error Value: White=0.81/Black=0.49} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "6.9"] [White "Nihal Sarin"] [Black "Praggnanandhaa R"] [Result "0-1"] [ECO "B50"] [WhiteElo "2620"] [BlackElo "2608"] [Annotator "TA"] [PlyCount "92"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,92,10,17,15,2,-13,-21,-27,-31,-29,-29,-32,-31,-33,-26,-40,-14,-12,0,0, 0,0,3,13,15,14,15,12,0,0,0,0,0,0,0,0,0,-4,0,0,0,0,0,0,-16,-53,0,0,-41,-57,-56, -63,-57,-293,-339,-275,-339,-336,-339,-337,-335,-335,-331,-297,-54,-423,-468, -453,-427,-618,-443,-437,-383,-407,-381,-5481,-2236,-1985,-1782,-29980,-29981, -29981,-29982,-29982,-29982]} 1. e4 c5 2. Nf3 d6 3. Nc3 Nf6 4. e5 dxe5 5. Nxe5 a6 6. g3 {B50: Sicilian: 2...d6, Miscellaneous.} Qd6 7. Nc4 Qc6 8. Rg1 { The position is equal.} Bg4 9. Be2 h5 {[#]} 10. Ne3 $146 ({Predecessor:} 10. d3 g6 11. Bf4 Bg7 12. Bxg4 hxg4 13. Qe2 Nbd7 14. O-O-O Kf8 15. Rh1 b5 16. Nd2 { 1-0 (92) Guseinov,G (2643)-Zhigalko,A (2577) Zuerich 2017}) 10... Nbd7 11. f3 Bh3 12. f4 e5 13. Bf3 e4 14. Nxe4 {[%mdl 64] [#] Remove Defender} Nxe4 15. d3 f5 16. dxe4 fxe4 17. Bxh5+ g6 18. Bg4 O-O-O 19. Bd2 Bg7 20. Bxh3 Rxh3 21. Qg4 $1 {[%CAl Rg4h3]} Rxh2 22. O-O-O Bd4 23. c3 Bxe3 24. Bxe3 Qa4 $40 {[%csl Gh2] [%CAl Ra4c2][%mdl 128] Black is up to no good.} (24... Qb5 $5 25. Rd2 $8 Rxd2 26. Bxd2 Qd3 $11) 25. Rd2 Rxd2 26. Bxd2 Qxa2 {White must now prevent ...Qa1+.} 27. Re1 Qd5 ({Black should try} 27... Qa1+ $1 $15 28. Kc2 Qa4+ 29. Kb1 Qc6) 28. Be3 $11 Qf5 29. Qe2 Nb6 30. g4 Qd5 {Hoping for ...Qa2.} 31. Rd1 $2 {Black converts the advantage convincingly.} ({White should play} 31. Kb1 $15) 31... Qxd1+ $19 32. Qxd1 Rxd1+ 33. Kxd1 {[%mdl 4096] Endgame [#] KB-KN} Nc4 $1 { [%CAl Rc4e3]} 34. Bc1 Kd7 35. b3 Nd6 36. Ke2 b5 $2 ({Better is} 36... c4 $19 37. b4 Kc6) 37. Ke3 $2 {[%mdl 8192]} (37. b4 $1 $15) 37... Ke6 38. b4 Kd5 39. Bd2 (39. Ke2 $142 Ne8 40. Kf2) 39... Nc4+ 40. Ke2 a5 41. bxa5 Nxa5 42. Be3 $2 ( 42. Kf2 Nc4 43. Be1) 42... b4 (42... Nc4 $142 43. Bg1 b4 44. cxb4 cxb4) 43. cxb4 cxb4 44. Bc1 Nc4 {Black mates.} 45. f5 gxf5 46. gxf5 Ke5 {Weighted Error Value: White=0.63/Black=0.27} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "6.8"] [White "Yip, Carissa"] [Black "Bjerre, Jonas Buhl"] [Result "0-1"] [ECO "B94"] [WhiteElo "2430"] [BlackElo "2542"] [Annotator "TA"] [PlyCount "66"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 13,66,0,17,11,13,-15,-12,-6,-8,-30,-24,-42,-7,-142,-70,-114,-111,-138, -114,-113,-120,-266,-56,-165,-85,-85,-85,-86,-90,-106,-49,-44,80,-34,4,4,4,4,4, 4,4,-91,-67,-144,-144,-130,-141,-125,-118,-636,-631,-6431,-5735,-2115,-1162]} 1. Nf3 c5 2. e4 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 Nbd7 7. f4 Qc7 8. Qe2 {B94: Sicilian Najdorf: 6 Bg5 Nbd7.} e5 {8...e6 injects fresh life into this line.} 9. Nf3 h6 10. Bxf6 {The position is equal.} Nxf6 {[#]} 11. fxe5 $146 ({Predecessor:} 11. g3 Be7 12. O-O-O O-O 13. Kb1 b5 14. Bg2 b4 15. Nd5 Nxd5 16. exd5 exf4 17. Nd4 {0-1 (34) Savchenko,B (2604)-Korobov,A (2698) Loo 2013}) 11... dxe5 {Threatening ...Ba3!} 12. O-O-O Be6 13. h3 (13. Nd5 $11 Bxd5 14. exd5) 13... Bd6 (13... Nh5 $1 $17 {[%CAl Rh5g3] Threatens to win with ... Ng3.} 14. Qe1 Rc8) 14. g4 O-O-O 15. Bg2 Bc4 16. Qf2 Bb4 {And now ...Bxc3 would win.} 17. Na4 (17. Qa7 $17) 17... Kb8 $2 (17... Nxe4 18. Nb6+ Kb8 19. Qe3 $17) (17... Bxa2 $19 {Strongly threatening ...Qa5.} 18. Qb6 Qxb6 19. Nxb6+ Kc7 20. Nd5+ Nxd5 21. exd5 Bxd5) 18. a3 (18. Qb6 $15 Bb5 19. Qxc7+ Kxc7 20. a3) 18... Be7 ({Weaker is} 18... Nxe4 19. Qe3 $11) (18... Ba5 $19 {aiming for ...Bb5.} 19. Qc5 Nxe4 20. Qxc7+ Bxc7) 19. Qb6 $17 Nxe4 {...Bb5 is the strong threat.} 20. Qxc7+ Kxc7 21. Nxe5 Bg5+ ({Black should try} 21... Nf2 $1 $17 22. Rxd8 (22. Nxc4 $2 Bg5+ 23. Kb1 Rxd1+ 24. Rxd1 Nxd1 $19) 22... Rxd8) 22. Kb1 $15 Bd5 {[#]} (22... Nd2+ $15 {stays ahead.} 23. Ka1 Bf6 24. Nxc4 Nxc4) 23. c4 ({White should play} 23. Rxd5 $1 $16 Rxd5 24. Nxf7) 23... Nc3+ 24. Nxc3 Bxg2 25. Nxf7 Rxd1+ 26. Rxd1 Rf8 27. Ne5 {[#]} (27. Nxg5 $11 {remains equal.} hxg5 28. Rd3) 27... Rf1 $1 $17 28. Nd5+ ({Better is} 28. Rxf1 $15 Bxf1 29. c5) 28... Kd6 29. Rxf1 Bxf1 30. Nf7+ Kc5 31. Kc2 $2 {[%mdl 8192]} (31. Nxg5 $17 hxg5 32. Kc2) 31... Bxc4 $19 {Black is clearly winning.} 32. Nxg5 Bxd5 33. b4+ Kd4 {Weighted Error Value: White=1.00/Black=0.36} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "6.7"] [White "Abdusattorov, Nodirbek"] [Black "Lei, Tingjie"] [Result "1-0"] [ECO "D38"] [WhiteElo "2634"] [BlackElo "2505"] [Annotator "TA"] [PlyCount "71"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,71,28,23,1,30,26,19,4,13,0,0,-13,44,41,51,46,78,77,102,99,135,96,103, 100,111,84,79,68,68,76,86,79,91,92,165,153,198,166,170,137,174,166,165,145,189, 170,176,131,136,65,54,0,116,120,160,108,782,750,5700,5622,29992,29989,29989, 29990]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. cxd5 exd5 6. Bf4 {D38: Queen's Gambit Declined: Ragozin Defence (4 Nf3 Bb4).} c6 7. e3 Bf5 8. Qb3 { The position is equal.} Qb6 9. Nh4 Be6 10. Bd3 Ne4 (10... Nh5 $11) 11. Nf3 Nd7 {[%CAl Bb8d7,Bd7f6,Bf6e4][%mdl 32]} 12. Qc2 {[#]} Qa5 $146 {[%CAl Re4c3]} ({ Predecessor:} 12... Ndf6 13. O-O Bd6 14. Be5 Nxc3 15. Bxd6 Nce4 16. Ba3 Qd8 17. Ne5 Nd6 18. f4 O-O {1-0 (66) Harika,D (2516)-Berry,N (2355) Douglas 2015}) 13. O-O Bxc3 14. bxc3 Ndf6 15. Ng5 Nxg5 16. Bxg5 Ne4 17. Bh4 (17. Bxe4 dxe4 18. Bf4 Qd5 $14) 17... g5 {[#]} 18. f3 $1 gxh4 19. fxe4 h3 20. exd5 hxg2 21. Rfb1 Qxd5 (21... cxd5 $16 22. Rxb7 Rc8) 22. Rxb7 $18 Rg8 23. Be4 {[%mdl 64] Double Attack } Qd6 24. c4 (24. Bxg2 $6 Bh3 $16) 24... Bd7 25. Qf2 ({But not} 25. Bxg2 $6 Bh3 $16) 25... Qe6 26. Qf3 {And now Rxd7! would win.} ({Don't take} 26. Bxh7 $6 Rh8 $14) 26... Qxc4 27. d5 {aiming for Rxd7!} Rd8 28. dxc6 {Threatens to win with Bd5!} Be6 29. Qf6 Qc5 $14 30. Qf3 (30. Bxg2 {[#]} Rxg2+ $1 {[%mdl 512]} 31. Kxg2 Rd2+ 32. Qf2 Bh3+ $1 {[%mdl 512]} 33. Kg1 Qg5+ 34. Qg3 Rg2+ 35. Kh1 Rxg3 36. Rb8+ Ke7 37. Rb7+ Kf6 38. Rxf7+ Kxf7 39. Re1 Rxe3 40. Rf1+ Bxf1 41. c7 Qg2# ) ({White should try} 30. c7 $14 Qxe3+ {[%mdl 64] Double Attack} 31. Qf2 Qxf2+ 32. Kxf2) 30... Qc3 (30... Qc4 $11 {remains equal.}) 31. Rab1 $16 h5 32. Rb8 $40 {[%mdl 128] White goes for the king.} (32. h3 $142) 32... Bg4 $2 {[%mdl 8192] Black cannot hold the game after this.} (32... Ke7 $16 33. Rxd8 Rxd8) 33. Qf4 $18 {Rxd8+ would kill now.} Qd2 34. Rxd8+ Kxd8 35. Qf6+ Kc8 36. Bf5+ { Weighted Error Value: White=0.18/Black=0.48} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "6.6"] [White "Murzin, Volodar"] [Black "Abdumalik, Zhansaya"] [Result "1-0"] [ECO "C77"] [WhiteElo "2502"] [BlackElo "2472"] [Annotator "TA"] [PlyCount "137"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 14,137,2,-5,2,2,0,-25,0,0,0,0,0,-8,0,-27,0,-23,0,-24,-16,-17,0,0,31,15, 37,6,17,-23,0,-124,0,-16,0,0,46,33,102,90,97,85,90,71,70,76,104,75,127,120,126, 111,192,66,108,66,81,63,65,63,69,60,75,85,187,170,191,189,166,192,171,66,147, 31,111,112,166,168,186,179,310,292,337,103,505,506,517,497,736,710,747,738,732, 696,737,661,821,441,423,331,415,402,363,350,588,369,507,500,474,452,846,725, 932,806,1048,992,29977,29978,29996,29997,29997,29998,29998,29996,29996,29993]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Bc5 5. O-O d6 6. Nc3 a6 7. Ba4 b5 8. Bb3 Na5 {8...h6 is a critical line. C77: Ruy Lopez: 3...a6 4 Ba4 Nf6, unusual lines.} 9. Bg5 h6 10. Be3 (10. Bxf6 {looks sharper.} Qxf6 11. Nd5 Qd8 12. c3 c6 13. d4) 10... Nxb3 {Black has an edge.} (10... Bxe3 {seems wilder.} 11. fxe3 c6 12. h3 O-O 13. Qe1 Bd7) 11. axb3 Bxe3 12. fxe3 {[#]} c6 $146 ({Predecessor:} 12... Bg4 13. Qe1 Bxf3 14. Rxf3 O-O 15. Qg3 b4 16. Nd5 Nxd5 17. exd5 Qd7 18. Qh4 c6 {0-1 (32) Maltsevskaya,A (2327)-Shirov,A (2662) Chess.com INT 2021}) 13. Qe1 O-O 14. Nh4 g6 15. h3 Kg7 16. Nf3 Ra7 17. b4 Nh7 18. Qg3 Nf6 19. d4 Re7 20. Qh4 {Threatens to win with Nxe5.} (20. Rad1 $5 {[%CAl Rd4e5]} exd4 21. Rxd4 $14 (21. Nxd4 Nxe4 22. Qf3 Qe8 $11)) 20... Ree8 21. Rae1 Qe7 22. Qf2 {[#]} (22. Rd1 $11 {remains equal.}) 22... Nh7 (22... a5 $1 $17 {[%CAl Ra5b4]} 23. Nd2 (23. bxa5 b4 $17) 23... axb4) 23. Qd2 Qc7 24. Nd1 f5 25. exf5 {Hoping for dxe5.} Rxf5 (25... e4 $14 26. fxg6 exf3 27. gxh7 fxg2 28. Rxf8 (28. Qxg2+ Kxh7 29. Rxf8 Rxf8 $14) 28... Rxf8) 26. dxe5 $16 dxe5 27. Nf2 e4 28. Nd4 Rf6 29. Qc3 h5 30. Nh1 Ref8 (30... Bd7 $142) 31. Rxf6 Rxf6 32. Rf1 Bd7 (32... Qe5 $16) 33. Qc5 (33. Ra1 $18) 33... Rxf1+ $1 $14 34. Kxf1 {aiming for Qe7+.} Kf7 35. Ne2 Nf6 36. Nf4 Bf5 37. Ng3 Qd7 38. Ke1 h4 (38... Qe7 $16) 39. Nxf5 $18 gxf5 40. Qe5 Qe7 41. Qxf5 Qxb4+ 42. Kd1 (42. c3 $18 Qd6 43. Qg6+ Ke7 44. Qg5) 42... Qd6+ ({ Black should try} 42... Qxb2 $14 43. Qe6+ Kg7) 43. Ke2 (43. Kc1 $16) 43... Ke7 (43... a5 $1 $14) 44. Ng6+ Kd8 (44... Kf7 $16 45. Nxh4 Qd5) 45. Nxh4 a5 {[#]} 46. Ng6 $1 Kc7 (46... a4 {was worth a try.} 47. Nf4 Nd5) 47. Nf4 Kb6 48. Qe6 $2 (48. g4 $18) 48... Qd8 $2 {[%mdl 8192] Black cannot hold the game after this.} (48... Qxe6 $16 49. Nxe6 a4) 49. g4 a4 50. g5 Ng8 (50... Ne8 $142 51. Qxe4 Ng7) 51. h4 b4 52. Qc4 Qf8 53. Qd4+ Kb5 54. Qxe4 a3 55. Ne6 {White threatens Nd4+ and mate.} Qd6 56. Nd4+ Kb6 57. bxa3 bxa3 58. Nb3 c5 $2 (58... Ne7 {was necessary.} 59. Qf4 Kc7) 59. Qa8 Qh2+ 60. Kd3 Qd6+ 61. Kc4 Qe6+ (61... Ne7 $142 62. Qa5+ {[%mdl 64] Double Attack} Kc6 63. Qb5+ (63. Nxc5 Qd5+ 64. Kc3 Qe5+ 65. Kc4 Qd5+ 66. Kc3 Qe5+ 67. Kd3 Qf5+ 68. Kd4 Qd5+ 69. Kc3 $11) 63... Kc7 64. Qa5+ Kc6 65. Qb5+ (65. Nxc5 Qd5+ 66. Kc3 Qe5+ 67. Kc4 Qd5+ 68. Kc3 Qe5+ 69. Kd3 Qf5+ 70. Kd4 Qd5+ 71. Kc3 $11) 65... Kc7 66. Qxc5+ Kd7 67. Qb5+ Kd8) 62. Qd5 Qg4+ 63. e4 {Threatening mate with Qd8+.} Qe2+ 64. Qd3 Qh2 65. Nxc5 {White mates.} Ne7 66. Qb3+ Kc7 67. Qb7+ Kd6 68. Qb8+ Kc6 69. Qxh2 {Weighted Error Value: White=0.35/Black=0.50} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "6.5"] [White "Khademalsharieh, Sarasadat"] [Black "Shuvalova, Polina"] [Result "1-0"] [ECO "E18"] [WhiteElo "2494"] [BlackElo "2489"] [Annotator "TA"] [PlyCount "35"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 19,35,42,29,17,56,53,79,66,129,126,123,123,193,195,868,866,29979,6859]} 1. Nf3 Nf6 2. c4 e6 3. Nc3 b6 4. g3 Bb7 5. Bg2 Bb4 6. O-O O-O 7. Qc2 d5 8. cxd5 exd5 9. a3 Be7 10. d4 Nbd7 11. Rd1 {E18: Queen's Indian: Old Main Line (4 g3 Bb7 5 Bg2 Be7 6 0-0 0-0 7 Nc3).} a6 12. Ne5 {[#]} h6 $146 ({Predecessor:} 12... Bd6 13. Bg5 Be7 14. Rac1 h6 15. Bxf6 Nxf6 16. Na4 Bd6 17. Nc4 Ne8 18. Ne3 c6 { 1/2-1/2 (52) Prudnikova,S (2181)-Eric,J (2278) Vrnjacka Banja 2020}) 13. Bf4 { White is better.} Rc8 (13... c6 $14) 14. Qf5 $16 c6 15. e4 dxe4 (15... b5 $16 { keeps fighting.}) 16. Nxe4 $18 Nxe5 $2 {[#]} (16... Nxe4 17. Nxd7 (17. Bxe4 Nf6 $18) 17... Nd6 18. Bxd6 Bxd6 19. Nxf8 Qxf8) 17. Nxf6+ ({Weaker is} 17. dxe5 Nd5 $18) 17... gxf6 18. dxe5 {White took control after the opening. Weighted Error Value: White=0.02/Black=1.12} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "6.4"] [White "Liang, Awonder"] [Black "Mammadzada, Gunay"] [Result "1-0"] [ECO "B23"] [WhiteElo "2592"] [BlackElo "2443"] [Annotator "TA"] [PlyCount "67"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,66,20,27,22,18,21,31,0,0,-9,0,0,40,47,48,45,47,20,65,31,89,83,144,139, 142,58,62,68,60,46,59,56,84,41,42,42,39,0,0,-45,-23,-80,-31,-36,-34,-39,-18, -50,-49,-100,-52,-29,-14,-143,359,0,345,-194,29999]} 1. e4 c5 2. Nc3 a6 3. Nge2 d6 4. a4 Nf6 5. g3 e6 6. Bg2 {B23: Closed Sicilian: Lines without g3.} Be7 7. O-O O-O 8. d3 {White is slightly better.} Nc6 9. h3 Qc7 10. g4 $5 {[%mdl 4] [#] A promising side line.} Nd4 $146 ({Predecessor:} 10... Rb8 11. Ng3 b5 12. Nce2 Bb7 13. g5 Nd7 14. f4 g6 15. Be3 Rfe8 16. h4 Bf8 {1-0 (47) Cavalcanti,F (2303) -Fiaes,M (1938) Brazil 2010}) 11. Nxd4 cxd4 12. Ne2 {[%CAl Bc3e2,Be2g3,Bg3f5] [%mdl 32]} e5 13. f4 Kh8 14. Ng3 exf4 (14... Ng8 $14) 15. Bxf4 $16 Nd7 ({ Black should play} 15... Ne8) 16. Nf5 Ne5 17. Kh1 (17. Nxd4 $16 Qb6 18. Be3) 17... Bxf5 $14 18. exf5 Rac8 19. Rf2 Bh4 20. Re2 f6 21. a5 Rfe8 22. Ra4 Qc5 23. b3 ({Much worse is} 23. Bxb7 Rb8 $15) 23... d5 24. Kh2 h6 25. Qf1 (25. Kh1 $11 {remains equal.}) 25... Bg5 {Hoping for ...Nxg4+!} 26. Bg3 Nc6 27. h4 Be3 28. Qf3 Rcd8 29. g5 (29. Kh3 $15) 29... hxg5 30. hxg5 fxg5 {Threatening ...Kg8.} 31. f6 (31. Bc7 $1 $11) 31... Rf8 $2 {[%mdl 8192]} (31... Re6 $17 {stays on course.} 32. Qh5+ Kg8 33. Rxe3 (33. f7+ $2 Kf8 $19) 33... dxe3 34. Qxg5 Rxf6) 32. Qh5+ $18 Kg8 {[#]} 33. fxg7 {[%mdl 8192]} (33. Rxe3 $1 $18 {[%mdl 512] is the narrow road to win.} dxe3 34. fxg7) 33... Rf7 {[%mdl 8192]} (33... Kxg7 $19 34. Bh3 (34. Rxe3 $2 Rh8 $19) 34... Qe7) 34. Qh8# {Weighted Error Value: White=0.47/Black=0.60} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "6.3"] [White "Salimova, Nurgyul"] [Black "Saduakassova, Dinara"] [Result "1/2-1/2"] [ECO "E06"] [WhiteElo "2395"] [BlackElo "2500"] [Annotator "TA"] [PlyCount "90"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 21,90,11,10,8,1,23,20,-6,0,-6,-6,0,19,0,0,0,21,22,31,0,0,0,6,6,5,7,46, 45,46,33,33,28,28,29,29,30,31,27,29,4,4,4,3,0,0,0,0,0,8,8,8,8,8,8,8,0,8,0,8,8, 14,8,46,46,46,0,46,46,46,0,46]} 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. Nc3 dxc4 7. Ne5 Nc6 8. Bxc6 bxc6 9. Nxc6 Qe8 10. Nxe7+ Qxe7 11. Qa4 c5 12. dxc5 {E06: Closed Catalan: Early deviations.} Qxc5 13. Be3 Qc7 14. O-O-O Bb7 15. f3 Nd5 16. Bd4 Rfd8 17. Qa3 a5 18. Nxd5 {[#]} Rxd5 $146 ({Predecessor: } 18... exd5 19. Qc3 f6 20. g4 a4 21. a3 Re8 22. e3 Bc6 23. g5 f5 24. h4 f4 { 0-1 (40) Janik,I (2467)-Raja,R (2369) New Delhi 2019}) 19. e4 Rdd8 20. Qc3 f6 21. Be3 Ba6 22. Rxd8+ Rxd8 23. Rd1 Kf7 (23... Rxd1+ {is more complex.} 24. Kxd1 Kf7 25. Bd2 a4 26. Kc2 e5) 24. Rxd8 Qxd8 25. Qd4 Qxd4 26. Bxd4 $14 {[%mdl 4096] Endgame KB-KB} e5 27. Bb6 a4 28. Kd2 Bb7 29. Kc3 f5 30. Kb4 fxe4 31. fxe4 Bc6 32. Kxc4 Bxe4 33. b3 axb3 34. axb3 Ke6 35. b4 Bd5+ 36. Kc5 e4 37. Kd4 Bc6 38. Bc7 g6 39. Bf4 h5 40. Kc5 Ba8 41. b5 Kd7 42. Kb6 Bd5 43. Kc5 Ba8 44. Kd4 Ke6 45. Kc5 Kd7 {Weighted Error Value: White=0.07/Black=0.05} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "6.2"] [White "Badelka, Olga"] [Black "Yoo, Christopher Woojin"] [Result "0-1"] [ECO "E06"] [WhiteElo "2418"] [BlackElo "2457"] [Annotator "TA"] [PlyCount "116"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 14,116,5,0,32,34,28,23,60,-9,-2,-62,-69,-38,-50,-111,-92,-104,-89,-83, -107,-97,-78,-85,-73,-83,0,0,0,-10,0,-6,0,-5,-6,-49,-49,-49,-49,-49,-49,-59, -31,-62,-58,-69,-33,-29,-29,-29,-27,-29,-29,-43,-35,-39,-29,-29,-33,-40,-35, -36,-35,-39,-39,-39,-35,-41,-20,-20,-20,-37,-37,-82,-49,-50,-29,-72,-68,-83, -81,-131,-139,-209,-211,-1070,-921,-1175,-971,-1327,-1004,-29968,-29967,-29973, -29973,-29973,-29973,-5587,-5097,-2164,-1825,-2192,-1719,-29969,-11981]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. Qc2 c5 7. dxc5 Qa5+ 8. Nc3 Nc6 { [#] White must now prevent ...d4. E06: Closed Catalan: Early deviations.} 9. cxd5 exd5 {...d4 is the strong threat.} 10. O-O Qxc5 {[#] White has an edge.} 11. Qd3 $146 ({White should play} 11. Be3 $14 Qa5 12. Rac1) ({Predecessor:} 11. Qa4 Rd8 {1/2-1/2 (11) Ivanov,M (2461)-Brumen,D (2430) Schwarzach 2000}) 11... d4 $11 12. Na4 (12. Ne4 $11 Nxe4 13. Qxe4) 12... Qa5 $15 13. b3 Bf5 $36 { [%mdl 2048] Black has some pressure.} 14. Qd1 ({White should try} 14. Qd2 $15) 14... Rfd8 15. Bd2 Qb5 16. Ne1 Nd5 17. Nd3 Bxd3 (17... Rac8 {looks sharper.} 18. Rc1 b6 19. Rc4 Bf6 20. Qa1 Nce7) 18. exd3 Qxd3 19. Re1 Bb4 (19... Qa6 $17) 20. Bxb4 $11 Qxd1 (20... Ncxb4 {keeps more tension.} 21. a3 Qxd1 22. Rexd1 Nc6 23. Rac1 Rac8) 21. Raxd1 {And now Bd2 would win.} Ndxb4 22. Nc5 Rab8 23. a3 Nc2 24. Re2 (24. Nxb7 $5 Rxb7 25. Bxc6 $11) 24... Nxa3 25. Nxb7 {[%mdl 64] [#] Remove Defender} Rxb7 26. Bxc6 Rbb8 27. Rd3 Rd6 28. Ba4 Kf8 29. Red2 Nb5 30. b4 Rdb6 31. Bxb5 Rxb5 32. Rxd4 Rxb4 {[%mdl 4096] Endgame KRR-KRR} 33. Rd7 R4b7 34. R7d6 Ra8 35. Ra6 Rb6 36. Ra5 Ke7 37. h4 h6 38. Kg2 a6 39. Rdd5 Rab8 40. Rd2 R8b7 41. Rda2 Ra7 42. R2a4 Kd6 43. Rg4 f6 44. Rga4 Rc6 45. Kh3 Kc7 46. Ra2 Kb6 47. Kg4 Rc5 48. Rxc5 (48. R5a3 $17 {was necessary.}) 48... Kxc5 $17 {KR-KR} 49. Kf5 $2 (49. Kf3) 49... a5 $19 {[%CAl Ba6a5,Ba5a4,Ba4a3,Ba3a2][%mdl 32]} 50. Kg6 a4 51. f4 Kb4 52. f5 a3 53. g4 Kb3 54. Rh2 a2 55. Rh1 Kb2 56. Rh2+ Ka3 57. Rh1 Rb7 58. Ra1 Kb2 {Weighted Error Value: White=0.68/Black=0.16} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "6.1"] [White "Keymer, Vincent"] [Black "Gukesh D"] [Result "1-0"] [ECO "A17"] [WhiteElo "2591"] [BlackElo "2578"] [Annotator "TA"] [PlyCount "129"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,129,4,4,4,0,0,0,3,31,24,18,25,23,25,40,30,35,32,26,19,17,8,9,8,68,64, 67,41,62,31,47,37,44,46,42,54,55,37,39,35,39,25,31,34,35,18,39,37,63,54,58,57, 65,49,49,55,69,0,49,49,76,39,45,17,17,17,22,22,76,24,109,58,430,412,400,278, 241,208,464,462,562,520,726,704,694,844,825,834,835,832,821,814,787,691,758, 762,1019,983,902,891,1146,715,693,696,809,764,627,472,733,476,1946,1936,2044, 819,29975,29976,29992,29993,29993,29966,29997,29998]} 1. Nf3 Nf6 2. c4 e6 3. Nc3 d5 4. e3 b6 5. cxd5 exd5 6. g3 {A17: English Opening: 1...Nf6 with ...Bb4.} Bb7 7. Bg2 Nbd7 8. O-O {The position is equal.} g6 9. b3 Bg7 {[#]} 10. Bb2 $146 ({Predecessor:} 10. Ba3 c5 11. b4 O-O 12. bxc5 bxc5 13. Rc1 Re8 14. Re1 Ne4 15. Bb2 Rb8 16. d3 Nxc3 17. Bxc3 Bxc3 18. Rxc3 {1/2-1/2 (70) Dubov,D (2696)-Yu,Y (2760) Liaocheng 2018}) 10... O-O 11. Rc1 a6 12. Re1 Qe7 13. d3 Rfe8 14. Re2 Rad8 15. Rec2 c5 16. d4 c4 ({Better is} 16... Ne4 $11) 17. Nd2 $14 cxb3 18. Nxb3 Qd6 19. Nb1 Rc8 20. Ba3 Qb8 21. Nc3 {[%CAl Bb1c3,Bc3e2,Be2f4][%mdl 32]} Bf8 22. Bxf8 Kxf8 23. Ne2 Rxc2 24. Rxc2 Rc8 25. Nf4 Rxc2 26. Qxc2 Qd6 27. Nc1 Ke7 28. Nce2 Nf8 29. Nd3 Ne6 30. Qb3 Ne4 31. h4 Nd2 32. Qd1 Ne4 33. Qb3 Nd2 $1 {[%CAl Rd2b3]} 34. Qc2 Ne4 35. Qb2 (35. g4 {is more complex.} a5 36. f3 Nf6 37. g5 Nd7 38. f4) 35... a5 36. Nc3 Nxc3 $1 37. Qxc3 f6 38. Qb3 Qc6 (38... Ba6 $11) 39. h5 (39. g4 $16) 39... g5 (39... Kf8 $11 {remains equal.}) 40. Qb1 (40. Nb2 $16) 40... b5 $2 {[%mdl 8192] This costs Black the game.} (40... Kf8 $14) 41. Nc5 $18 Nf8 42. a3 Bc8 43. Qb3 Kd6 $2 (43... Nd7 44. Qb1 (44. Qxd5 Qxd5 45. Bxd5 Nxc5 $11) (44. Bxd5 Nxc5 45. dxc5 Qxc5 $18) 44... Nf8) 44. e4 Nd7 45. exd5 Nxc5 46. Qf3 (46. dxc6 $2 {loses.} Nxb3 47. d5 Nd4 $19) 46... Qd7 47. Qxf6+ { [%mdl 64] [#] Double Attack} Ne6 48. Qe5+ Ke7 49. dxe6 Qxe6 50. Qxg5+ Qf6 51. Qc5+ {[%mdl 64] [#] Double Attack} Kd8 52. Qxb5 Qxd4 53. Qxa5+ Ke8 54. Qb5+ Bd7 55. Qb8+ Kf7 56. Qb3+ Be6 57. Qf3+ Kg7 58. Kh2 Bg4 (58... h6 $142 59. Qb7+ Bf7) 59. Qe3 Qf6 (59... Qxe3 $142 60. fxe3 Bd7) 60. h6+ Kg6 61. a4 Qa1 62. Be4+ { White mates.} Kh5 63. Qc5+ Kxh6 64. Qf8+ Kh5 65. Qf7+ {[%mdl 64] Double Attack. Weighted Error Value: White=0.15/Black=0.36} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "5.10"] [White "Yoo, Christopher Woojin"] [Black "Gukesh D"] [Result "1-0"] [ECO "A90"] [WhiteElo "2457"] [BlackElo "2578"] [Annotator "TA"] [PlyCount "75"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 12,75,61,57,57,61,62,31,35,-5,5,-14,5,0,13,-12,8,16,62,42,89,0,0,0,21, 23,20,0,0,0,19,0,10,-206,-193,-179,-4,-18,-25,-10,-14,-13,508,79,74,74,75,75, 82,86,76,88,97,-8,227,3,212,37,441,406,647,550,837,682,5922,5922]} 1. d4 f5 2. Nf3 Nf6 3. c4 e6 4. g3 Bb4+ 5. Bd2 Qe7 6. Bg2 O-O 7. O-O Bxd2 {A90: Dutch Defence: Miscellaneous and Modern Stonewall (with ...Bd6).} 8. Nbxd2 d6 9. b4 e5 {White is slightly better.} 10. dxe5 (10. e4 $5) 10... dxe5 11. Qb3 c5 12. bxc5 Nc6 13. e3 {[#]} Nd7 $146 ({Predecessor:} 13... Qxc5 14. Qc3 Nd5 15. Qc1 Nb6 16. Rb1 e4 17. Rb5 Qe7 18. Nd4 Bd7 19. Rb2 Ne5 {1/2-1/2 (42) Papp,T (2286) -Radnetter,G (2285) Oberwart 2012}) 14. Qa3 g5 15. Nb3 g4 16. Nfd2 ({White should play} 16. Nh4 $1 $16) 16... e4 $11 17. Rfd1 Nde5 18. Nd4 Be6 19. Qc3 Qf6 20. Rac1 Nd3 21. Rb1 Rfd8 {[%CAl Rc6d4]} (21... Rad8 {feels hotter.} 22. Rxb7 Nxc5 23. Rc7 Nxd4 24. exd4 Qxd4 25. Qxd4 Rxd4 26. Rxc5 Rfd8) 22. Bxe4 $2 (22. N2b3 $11) 22... Nxd4 $19 (22... fxe4 23. Nxe4 Qg6 24. Nxe6 $18 (24. Qxd3 Nxd4 25. exd4 Bf5 $11) (24. Rxd3 Qxe4 25. Nxe6 Qxe6 $11) (24. Rxb7 $2 Nxd4 25. exd4 Qxe4 $19 {[%mdl 64] Double Attack})) 23. exd4 {[#]} Nxf2 $1 {[%mdl 512]} 24. Bxb7 (24. Kxf2 fxe4+) 24... Nxd1 25. Rxd1 Rab8 26. c6 {[%CAl Rc6c7]} Rxd4 $2 { [%mdl 8192] [#]} (26... Qxd4+ $11 27. Qxd4 Rxd4) 27. Re1 $2 (27. Nf1 $1 $18 { [%mdl 512] and the rest is easy.}) 27... Kf7 $16 {[#]} 28. Rxe6 Kxe6 {[#]} 29. c7 $1 Rf8 {Hoping for ...Kd7.} (29... Re8 30. c8=Q+) 30. c8=Q+ Rxc8 31. Bxc8+ Kf7 {[#] White must now prevent ...Rd8!} 32. Bxf5 Qe5 $2 {[#]} (32... Rd8 $11 { and Black is okay.} 33. Qa5 Qd4+ {[%mdl 64] Double Attack} 34. Kf1 Qxd2 35. Qxa7+ Kf6 36. Bxg4 Qc1+ 37. Kf2 Qd2+ 38. Kf1 Qc1+ 39. Kf2 Qd2+ 40. Kf1) 33. Be4 $1 h5 $2 (33... Rxe4 $11 {and Black stays safe.} 34. Nxe4 Qxe4) 34. Kf2 $2 (34. Qe3 $18 {And now Bd5+ would win.} Kg7 35. Kf2) 34... Qc5 {[%mdl 8192]} (34... Rxe4 $14 35. Nxe4 Qxe4) 35. Ke2 $18 Ke7 (35... Rd6 $142 36. Kd1 h4) 36. Qe3 { White is clearly winning.} Kd8 37. Bd5 Qb6 38. Nb3 {Weighted Error Value: White=0.74/Black=0.99} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "5.9"] [White "Saduakassova, Dinara"] [Black "Badelka, Olga"] [Result "1-0"] [ECO "D02"] [WhiteElo "2500"] [BlackElo "2418"] [Annotator "TA"] [PlyCount "97"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 11,97,0,5,-11,-11,-2,-8,-2,-6,-39,-20,-18,0,-11,7,0,33,14,12,11,25,22, 15,0,2,8,12,0,0,0,0,0,0,-36,-2,-2,-2,-37,0,0,0,0,0,0,0,0,63,88,81,33,39,33,47, 0,2,8,71,43,62,0,0,0,157,157,397,392,474,420,405,263,263,256,242,220,5314,531, 533,493,479,428,5185,418,421,259,664,704,29993,29994]} 1. d4 Nf6 2. Nf3 e6 3. Bf4 d5 4. e3 c5 5. c3 Nc6 6. Nbd2 Nh5 7. Be5 {D02:1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4.} f6 8. Bg3 g6 9. Bd3 {The position is equal.} Be7 10. Qc2 {[#]} Bd7 $146 ({Predecessor:} 10... Kf7 11. Rd1 cxd4 12. exd4 Bd7 13. Nb3 Qb6 14. O-O Rac8 15. Qd2 Nxg3 16. fxg3 Kg7 {0-1 (44) Carlstedt,J (2425)-Vitiugov,N (2734) Helsingor 2018}) 11. dxc5 Bxc5 12. e4 Nxg3 13. hxg3 Qb6 14. Nb3 {And now exd5 would win.} dxe4 15. Bxe4 O-O-O $1 16. Nxc5 Qxc5 17. O-O-O f5 18. Bxc6 Bxc6 19. Ng5 {[#] Strongly threatening Rxd8+.} Qe7 20. f4 Rxd1+ 21. Qxd1 e5 22. Qe1 e4 23. Qe3 Kb8 24. Nf3 Qf7 25. Qd4 Rc8 26. Ne5 Qxa2 27. Nxc6+ (27. Rxh7 $2 Qa1+ 28. Kc2 Ba4+ 29. b3 Qa2+ 30. Kd1 Qxb3+ 31. Ke1 Bb5 $19) 27... bxc6 28. Rxh7 $11 {[%mdl 4096] Endgame Intending Qb4+ and mate. KQR-KQR} c5 (28... Ka8 $11) 29. Qd6+ $14 Ka8 30. Qd7 {[%CAl Rd7c8]} Qa6 31. Qd5+ Kb8 32. Rg7 $40 {[%mdl 128] White is up to no good.} Qf1+ 33. Kc2 { [%csl Gg7][%CAl Rd5b7]} Qa6 (33... Qe2+ $11 {keeps the balance.} 34. Kc1 Qf1+ 35. Qd1 Qxd1+ 36. Kxd1 Rd8+ 37. Ke2 Rd6) 34. g4 $16 e3 35. Qe5+ (35. Qd7 $14) 35... Ka8 $11 36. Qxe3 {Threatens to win with Qd3.} (36. gxf5 $2 Qe2+ 37. Kc1 Qe1+ 38. Kc2 Qe2+ 39. Kc1 Qd2+ 40. Kb1 Qd1+ 41. Ka2 Qa4+ 42. Kb1 Rd8 $19) 36... fxg4 $2 (36... Qa4+ $11 37. Kb1 Qd1+ {[%mdl 64] Double Attack} 38. Qc1 Qd3+ 39. Qc2 Qf1+ {[%mdl 64] Double Attack} 40. Qc1 Qd3+ 41. Qc2 Qf1+ {[%mdl 64] Double Attack} 42. Qc1 Qd3+) 37. Qe4+ $16 Kb8 $2 {Loses the game.} (37... Qc6 $16 38. Qxc6+ (38. Qxg6 Qa4+ 39. Kc1 Rd8 $11) 38... Rxc6) 38. Rxg6 $18 {[%mdl 64] [#] Double Attack} Qf1 39. Rg7 {[%csl Gg7][%CAl Re4b7]} Qb5 40. f5 Re8 41. Re7 ({ Don't go for} 41. Qxg4 $2 Re2+ 42. Qxe2 Qxe2+ 43. Kb1 Qe4+ 44. Ka2 Qxf5 $19) 41... Rxe7 42. Qxe7 {f6 is the strong threat. KQ-KQ} Qf1 $2 (42... Qa4+ 43. Kd3 Qd1+ 44. Kc4 Qf1+ 45. Kxc5 Qxf5+ 46. Kc6 Qc8+ 47. Kd5 g3 48. Qd6+ Kb7 49. Qe7+ (49. Qxg3 Qc6+ 50. Kd4 Qb6+ 51. Kd3 Qxb2 $16) 49... Kb8 50. Qe5+ Kb7) 43. Qd6+ (43. f6 $142 Qxg2+ 44. Kb3 Qd5+ 45. Ka3) 43... Kb7 44. Qd5+ Kb6 45. Qe6+ Kb7 ( 45... Kc7 $142 46. Qf7+ Kd6 47. Qf6+ (47. Qxa7 Qxg2+ 48. Kd3 Qf3+ 49. Kd2 Qxf5 $11) 47... Kd7 48. Qg7+ Ke8 49. Qxg4 Kf8) 46. Qe4+ (46. f6 $142 Qxg2+ 47. Kb3) 46... Kb6 47. Kb3 Qd1+ $2 (47... g3 48. Qe6+ Kc7) 48. Ka2 Qa4+ 49. Qxa4 { Weighted Error Value: White=0.42/Black=0.59} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "5.8"] [White "Mammadzada, Gunay"] [Black "Salimova, Nurgyul"] [Result "1-0"] [ECO "B15"] [WhiteElo "2443"] [BlackElo "2395"] [Annotator "TA"] [PlyCount "163"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 12,162,21,24,62,22,26,34,21,24,31,0,57,54,50,54,57,32,54,37,43,39,97,97, 87,86,92,83,101,66,75,68,111,60,67,43,87,81,113,73,81,58,87,78,131,107,689,225, 218,223,247,232,212,110,111,79,80,0,0,-327,-325,-258,-242,-310,-310,-310,-310, -310,-310,-310,-310,-310,-310,-310,-300,-292,-288,-294,-341,-339,-318,-366, -371,-365,-353,-408,-306,-513,-313,-398,-298,-415,-389,-356,-334,-304,-286, -404,-394,-368,-262,-268,-252,-278,-250,-559,-77,-85,-86,-87,-76,-76,-64,-135, -87,-91,-93,-457,-431,-414,0,-95,-90,-379,-379,-433,-422,-572,-588,-29975, -29977,-29978,-199,-147,0,-29968,-29965,-29964,-29961,-29970,-29974,-29993, -29983,-29983,-29982,-29981,-29979,-29979,-29980,-29984,29998,29999,29999]} 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ exf6 6. c3 Bd6 7. Bd3 Na6 { B15: Caro-Kann: 3 Nc3:3...g6 and 3...dxe4 4 Nxe4 Nf6 5 Nxf6+ exf6.} 8. Qf3 Nc7 9. Ne2 O-O {White is slightly better.} 10. O-O Re8 {[#]} 11. Ng3 $146 ({ Predecessor:} 11. Re1 Nd5 12. Bd2 Bd7 13. c4 Nc7 14. Ng3 g6 15. Rxe8+ Bxe8 16. Re1 Bd7 17. Ne4 {1-0 (49) Morcillo Holgado,M (1951)-Buchmann,H (1962) ICCF email 2011}) 11... Bxg3 (11... g6 $11) 12. Qxg3 $14 Nd5 13. Bh6 {[%csl Gh6] [%CAl Rg3g7]} g6 14. Bd2 Be6 15. b3 Kg7 16. Rfe1 $36 {[%mdl 2048] White has some pressure.} Qd7 (16... h5 $14) 17. c4 $16 Ne7 18. Qh4 {White wants to mate with Bh6+.} h5 19. Bc3 $1 Ng8 20. h3 Bf5 21. Bf1 a5 {[%CAl Ba7a5,Ba5a4][%mdl 32]} 22. f3 (22. Rxe8 $16 Rxe8 23. f3 (23. Bxa5 Re4 $16)) 22... a4 $14 23. g4 hxg4 24. hxg4 g5 25. Qh2 Bg6 {Black wants to play ...axb3.} 26. Qd2 axb3 27. axb3 Qd6 (27... Rxa1 $142 28. Rxa1 Qc7) 28. Kg2 $16 Ne7 $2 {[%mdl 8192]} (28... Rad8 $16) 29. Rxa8 $2 (29. Bb4 Qf4 30. Qxf4 gxf4 31. Rxa8 Rxa8 32. Rxe7) 29... Rxa8 $18 30. Bb4 Ra2 31. Qxa2 ({Don't play} 31. Bxd6 $6 Rxd2+ 32. Kg3 Ng8 $16) 31... Qxb4 32. Re3 (32. Qe2 $18 Kf8 33. Kh1) 32... Bh7 $16 33. Qa4 Qd6 34. Qa7 (34. Qa5 $16) 34... Ng6 $11 35. Qc5 $2 {[%mdl 8192]} ({Don't go for} 35. Qxb7 $2 Qf4 $19) (35. Qa2 $11 {and White has nothing to worry.}) 35... Nh4+ $1 $19 36. Kf2 Qh2+ 37. Ke1 Qg1 $1 {[%CAl Rg1e3]} 38. Ke2 {[#]} Ng6 $1 {[%CAl Rg6f4] Strongly threatening ...Nf4+.} 39. Re4 ({But not} 39. Re8 $2 Nf4+ 40. Kd2 Qxf1 $19) 39... Nf4+ {[%mdl 64] Discovered Attack} 40. Rxf4 gxf4 41. Qe7 Qxd4 42. Ke1 Qc3+ 43. Kf2 Qxb3 44. g5 Qb2+ 45. Kg1 Qd4+ 46. Kg2 fxg5 47. Qxg5+ Bg6 48. Qe7 Qd2+ 49. Kh1 $2 (49. Be2) 49... Qb2 50. c5 Qc3 51. Bg2 Qc1+ 52. Kh2 Qb2 53. Qd6 Qf6 {White must now prevent ...Qxd6.} 54. Qc7 (54. Qd2 {is the only way for White.}) 54... Qh4+ 55. Kg1 Qe1+ 56. Kh2 Qb4 57. Qe5+ Kh7 58. Qe7 $2 (58. Bf1) 58... b6 $2 (58... b5 $19 59. Qd6 Qc3 60. Qxc6 b4) 59. Qh4+ $17 Kg7 { Hoping for ...b5.} 60. cxb6 Qxb6 {...Qd4 is the strong threat.} 61. Qxf4 Qc5 62. Qc7 (62. Kg3 $15) 62... Qh5+ 63. Kg1 c5 64. f4 $2 {[%mdl 8192]} (64. Qd6 $17 {is tougher.}) 64... Qd1+ $19 65. Kh2 Qh5+ $2 (65... Qd4 $19 {has better winning chances. Threatens to win with ...c4.} 66. Bf1 Be4 67. Qe5+ f6 68. Qe7+ Kg6 69. Qe8+ Kf5 70. Qh5+ Kxf4 71. Qh4+ Ke5 72. Qg3+ Kd5 73. Qg8+ Kd6 74. Qb8+ Ke6 75. Qg8+ Ke5 76. Qg3+ Kd5 77. Qg8+ Ke5 78. Qg3+) 66. Kg1 $1 $17 Qf5 67. Kh2 $2 {[%mdl 8192]} (67. Qe5+ $17 Qxe5 68. fxe5) 67... Qc2 $19 68. Qe5+ Kh7 69. Kg3 {[#]} c4 $1 70. Bh3 Qd3+ 71. Kh4 Qd8+ $2 (71... c3 {mates} 72. f5 Qd8+ 73. Kg3 Qg5+ 74. Bg4 Bh5 75. Qxc3 Qxg4+ 76. Kf2 Qxf5+ 77. Ke1 Qb1+ 78. Kd2 Qa2+ 79. Ke3 Qe6+ 80. Kf4 Qg4+ 81. Ke3 Qg3+ 82. Kd4 Qg4+ 83. Kc5 Qc8+ 84. Kd4 Qxc3+ 85. Kxc3 f5 86. Kd4 f4 87. Ke4 f3 88. Ke3 Kg6 89. Kf2 Kg5 90. Kg3 Bg4 91. Kf2 Kf4 92. Ke1 Ke3 93. Kd1 f2+ 94. Kc1 f1=Q+ 95. Kb2 Kd2 96. Kb3 Qb5+ 97. Ka3 Kc3 98. Ka2 Qb2#) 72. Kg3 Qd3+ $2 {[%mdl 8192]} (72... f6 $17 73. Qc3 Qd3+ 74. Qxd3 Bxd3) 73. Kh4 Qe4 74. Qc7 c3 75. Kg5 c2 76. Bg4 Qe3 77. Bf5 Qg3+ 78. Kf6 Qh4+ 79. Ke5 Qe1+ 80. Kf6 c1=Q $4 {[%mdl 8192]} 81. Qxf7+ $1 {[%mdl 64] Double Attack} Kh8 82. Qg7# {Weighted Error Value: White=0.54/Black=0.42} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "5.7"] [White "Shuvalova, Polina"] [Black "Liang, Awonder"] [Result "0-1"] [ECO "B01"] [WhiteElo "2489"] [BlackElo "2592"] [Annotator "TA"] [PlyCount "44"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,44,51,52,43,47,43,58,41,54,35,37,13,22,11,74,61,58,18,63,36,36,20,52, 0,28,-50,-39,-47,0,0,0,-4,0,-63,-56,-820,-824]} 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd8 4. d4 Nf6 5. Nf3 g6 6. Bc4 {B01: Scandinavian Defence.} Bg7 7. O-O O-O 8. Re1 {White is slightly better.} a6 {[#]} 9. Bf4 $146 ({Predecessor:} 9. a4 Nc6 10. h3 b6 11. Bf4 Bb7 12. Qd2 e6 13. Rad1 Ne7 14. Ne5 Ned5 15. Bg5 {1-0 (21) Carlsen,M (2862)-Maghsoodloo,P (2676) Chess.com INT 2020}) 9... b5 10. Be2 Bb7 11. Ne5 Nd5 (11... Qc8 $1 $11) 12. Nxd5 $16 Bxd5 13. a4 {[%CAl Ba2a4,Ba4a5] [%mdl 32]} b4 14. a5 Nc6 15. Qd2 Qe8 16. Bf3 (16. Bf1 $14) 16... Rd8 17. Bxd5 ( 17. Bd1 $11) 17... Rxd5 $15 18. c3 Nxa5 {[#] ...Nb3 is the strong threat.} 19. Qe2 ({Avoid the trap} 19. cxb4 $2 Nb3 $19) 19... bxc3 20. bxc3 Bxe5 21. dxe5 ({ Better is} 21. Bxe5 $11 Qc6 22. Bf4) 21... Qc6 $1 22. Ra4 $2 {[%mdl 8192] [#]} Qxa4 {Weighted Error Value: White=0.64/Black=0.15} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "5.6"] [White "Abdumalik, Zhansaya"] [Black "Khademalsharieh, Sarasadat"] [Result "1/2-1/2"] [ECO "C54"] [WhiteElo "2472"] [BlackElo "2494"] [Annotator "TA"] [PlyCount "98"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 17,98,9,15,18,12,17,55,14,25,-8,-6,0,-13,-16,-12,-17,-18,-50,-35,-54, -37,-54,-12,-18,-14,-31,-2,-2,16,0,0,-10,0,-20,0,0,0,0,0,0,14,30,25,13,19,0,0, 0,0,-57,-73,-72,-72,-57,-52,-79,-55,-31,-33,-36,-8,-6,-8,-10,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 Nf6 5. O-O d6 6. c3 a6 7. Re1 Ba7 8. b4 Ng4 9. Rf1 Nf6 10. Nbd2 {C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3.} h6 11. a4 g5 {[#]} 12. Qb3 $146 {White is slightly better.} ({Predecessor:} 12. Nb3 g4 13. Ne1 h5 14. b5 Ne7 15. Be3 h4 16. Nc2 Ng6 17. Bxa7 Rxa7 18. Ne3 Nh5 19. Nxg4 Qg5 20. h3 {0-1 (27) Xiong,J (2709) -Andreikin,D (2725) Chess.com INT 2021}) 12... O-O 13. Ra2 Ne7 14. d4 Ng6 15. dxe5 dxe5 16. b5 {Threatening Ba3.} Bc5 17. Qc2 axb5 18. axb5 Rxa2 19. Qxa2 Qe7 20. Nb3 Bd6 ({Much weaker is} 20... Nxe4 $6 21. Qc2 $16) 21. Re1 Kg7 22. Nfd2 Nf4 23. Nf1 Be6 24. Qa4 Nd7 {[#] aiming for ...Nb6.} 25. Bxe6 fxe6 26. Be3 Nc5 27. Nxc5 Bxc5 28. Qc4 Bb6 29. Bxb6 cxb6 30. Rd1 Qc5 31. Qxc5 Ne2+ 32. Kh1 bxc5 $11 {[%mdl 4096] Endgame KRN-KRN} 33. f3 (33. Rd7+ $11 Kg6 34. f3) 33... Nxc3 $15 34. Rc1 Nxb5 {[#] Strongly threatening ...Rc8.} 35. Rxc5 Nd4 36. Ne3 b5 ( 36... h5 {is interesting.} 37. Rc7+ Kh6 38. Rxb7 g4 39. Kg1 Rf4) 37. Ng4 b4 { [%CAl Bb5b4,Bb4b3][%mdl 32] Threatens to win with ...Rf7.} 38. Nxe5 b3 (38... Rb8 {is more complex.} 39. Rc7+ Kh8 40. Nd7 Nb5 41. Rc1 Rd8) 39. Rc7+ {The position is equal.} Kg8 40. Rb7 Rc8 {[%CAl Rc8c1]} (40... Ra8 {keeps more tension.} 41. h4 Ra5 42. Nc4 Ra1+ 43. Kh2 gxh4 44. Kh3 Rh1+) 41. h4 gxh4 42. Kh2 Rc5 43. Nd7 Rb5 (43... Rc4 {looks sharper.} 44. Nf6+ Kf8 45. Rd7 b2 46. Nh7+ Kg8) 44. Nf6+ Kf8 45. Rd7 b2 46. Nh7+ Ke8 47. Nf6+ Kf8 48. Nh7+ Ke8 49. Nf6+ Kf8 {Weighted Error Value: White=0.07/Black=0.07} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "5.5"] [White "Lei, Tingjie"] [Black "Murzin, Volodar"] [Result "1-0"] [ECO "B12"] [WhiteElo "2505"] [BlackElo "2502"] [Annotator "TA"] [PlyCount "73"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 10,73,6,18,23,23,23,16,32,25,29,11,21,23,58,9,6,22,56,47,81,58,99,79,96, 53,143,35,47,42,26,8,18,20,20,26,41,8,22,25,41,32,33,12,305,310,531,468,656, 609,645,636,635,635,571,493,472,476,689,678,696,691,963,912,1094,1056]} 1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nd2 e6 5. Nb3 Nd7 6. Nf3 Ne7 {B12: Caro-Kann: Advance Variation.} 7. Be2 h6 8. O-O g5 {The position is equal.} 9. a4 $1 {[%CAl Ba2a4, Ba4a5][%mdl 4] is currently scoring better than 9.Ne1.} Bg7 10. a5 Qc7 11. Bd2 Ng6 12. c4 dxc4 13. Bxc4 Rd8 {[#]} 14. Qe2 $146 ({Predecessor:} 14. Rc1 O-O 15. Qe2 b6 16. Ne1 Qb8 17. Ba6 Ne7 18. Bb4 c5 19. Ba3 Nd5 20. dxc5 bxc5 21. Nxc5 Nxe5 {0-1 (31) Feygin,M (2468)-Chabanon,J (2486) Belgium 2017}) 14... O-O 15. Rfc1 Rfe8 16. Ne1 {Threatens to win with g4.} Ne7 17. Bb4 c5 {[#]} ({Black should play} 17... Nf8 $14) 18. Nxc5 (18. Bb5 $1 $16) 18... Nc6 $14 {[%mdl 64] Double Attack} 19. Nxd7 {Strongly threatening Nf6+.} Qxd7 20. Bd6 Nxd4 21. Qe3 $36 {[%mdl 2048] White has good play.} Nb5 22. Bc5 a6 23. Nf3 Rc8 (23... g4 $5 {[%CAl Rg4f3]} 24. Nh4 Bh7 $11) 24. b4 Nc7 25. Rd1 Nd5 26. Qb3 Qc6 $2 {[%mdl 8192] A mistake that costs the game.} (26... Qc7 $11) 27. Nd4 $18 ({Inferior is } 27. Bxd5 exd5 28. Nd4 (28. Rxd5 $2 Be6 $19 {[%mdl 64] Skewer}) (28. Qxd5 Qxd5 29. Rxd5 Be6 $11) 28... Qd7 $11) 27... Qc7 (27... Bc2 28. Qxc2 (28. Nxc6 Bxb3 29. Bxb3 bxc6 $11) 28... Nxb4) 28. Nxf5 {White is clearly winning.} Bxe5 (28... Nxb4 $142 29. Nxg7 Kxg7 30. Bxb4 Qxc4) 29. Nxh6+ Kg7 30. Ng4 Bxa1 31. Rxa1 Qf4 32. Bxd5 exd5 33. Ne3 ({Less strong is} 33. Qh3 Re6 $18) 33... Red8 (33... Rcd8 $142 34. Rd1 (34. Nxd5 Qe5 $17 {[%mdl 64] Double Attack}) 34... Qe4) 34. Rd1 d4 35. Nd5 Qg4 {aiming for ...Rxd5.} 36. Bxd4+ Kh6 {[#]} 37. Ne3 $1 {Weighted Error Value: White=0.21/Black=0.53} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "5.4"] [White "Bjerre, Jonas Buhl"] [Black "Abdusattorov, Nodirbek"] [Result "1/2-1/2"] [ECO "B12"] [WhiteElo "2542"] [BlackElo "2634"] [Annotator "TA"] [PlyCount "123"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 10,123,22,14,6,14,10,4,32,-16,0,-14,0,0,0,-79,-55,-60,-50,-47,-43,-65, -65,-68,-56,-56,-56,-53,-54,-93,-93,-76,-70,-104,-104,-96,-109,-106,-91,-127, -84,-84,-96,-108,-86,-106,-28,-32,0,-33,-16,-52,0,-20,-20,-83,-20,-20,-20,-20, -20,-20,-20,-21,0,0,0,0,8,8,12,0,0,0,8,12,12,0,12,12,12,12,12,12,12,12,12,12, 20,27,290,290,290,0,0,0,244,0,0,0,0,0,0,0,0,0,0,-2,-2,-2,0,0,0,0,0,0]} 1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nd2 e6 5. Nb3 Nd7 6. Nf3 c5 {B12: Caro-Kann: Advance Variation.} 7. dxc5 a6 8. Be3 Ne7 {[#]} 9. c4 $146 ({Predecessor:} 9. Be2 Be4 10. Ng5 Nxe5 11. Nxe4 dxe4 12. c3 Nf5 13. Bd4 Nc6 14. O-O Be7 15. Bc4 {1/2-1/2 (41) Anand,V (2776)-Caruana,F (2784) Karlsruhe/Baden-Baden 2018}) 9... Bg4 10. Be2 dxc4 11. Bxc4 Nf5 12. Bd2 {[#]} (12. Be2 $11) 12... Nxe5 $1 13. Be2 Nd3+ 14. Bxd3 Qxd3 15. Qe2 Qd5 {...Nh4! is the strong threat.} 16. h3 Bxf3 17. Qxf3 Qxf3 18. gxf3 O-O-O 19. Rc1 Be7 20. Ke2 Rd5 21. Be3 Rhd8 22. Rc4 Bf6 23. Rc2 Kc7 24. Rhc1 Nd4+ 25. Nxd4 Bxd4 26. b4 Rh5 27. Rh1 Kc6 (27... a5 $17 28. a3 Bxe3 29. fxe3 Rg5) 28. a4 $11 e5 29. Rc4 Bxe3 30. Kxe3 $15 {[%mdl 4096] Endgame KRR-KRR} f5 (30... Rd4 $15 31. Rxd4 exd4+ 32. Kd3 (32. Kxd4 Rh4+ 33. Kc3 a5 $17) 32... a5 33. bxa5 Rxc5) 31. h4 g5 {Threatens to win with ...f4+.} 32. Rb1 $1 Rxh4 (32... gxh4 $17 33. b5+ axb5 34. axb5+ Kc7) 33. b5+ $1 $11 axb5 34. axb5+ Kc7 35. Rxh4 gxh4 {KR-KR} 36. Rg1 h3 37. Rg5 h2 (37... Rd4 {seems wilder.} 38. Rh5 Kc8 39. b6 f4+ 40. Ke2 Rd5) 38. Rh5 {[%mdl 64] [#] Double Attack} Rh8 (38... Rd5 {feels hotter.} 39. Rxh7+ Kd8 40. Rh8+ Kc7 41. Rh7+) 39. Rxh2 {With the idea Rh6.} h5 40. Rh4 Kd7 41. f4 e4 42. Kd4 Ke6 43. c6 b6 44. c7 Kd7 45. Ke5 Kxc7 46. Kxf5 {Hoping for Ke6.} Kd6 47. Kxe4 Ke6 48. f5+ Kf6 49. Kf4 Rh7 $2 {[%mdl 8192]} (49... Kf7 $1 $11) 50. Rh1 $18 h4 51. Kg4 ({Only move: } 51. Rc1 $18 {Black must now prevent Rc6+.} Rh8 52. Rc6+ {[%mdl 64] Double Attack} Ke7 53. f6+ (53. Rxb6 h3 $14) 53... Kd7 54. f7 (54. Rxb6 h3 $11)) 51... Rg7+ $11 52. Kf4 $2 (52. Kf3 $11) 52... Rh7 $18 53. Kg4 $2 (53. Rc1 $18 { Strongly threatening Rc6+.} Rh8 54. Rc6+ {[%mdl 64] Double Attack} Ke7 55. f6+ (55. Rxb6 h3 $14) 55... Kd7 56. f7 (56. Rxb6 h3 $11)) 53... Rg7+ $11 {The position is equal.} 54. Kf4 Rg5 55. Rxh4 {Intending Rh6+ and mate.} Rxf5+ { [%mdl 64] Double Attack} 56. Ke4 Rxb5 {aiming for ...Rb4+.} 57. f4 Rb4+ 58. Kd3 Kf5 59. Kc3 Rxf4 60. Rxf4+ Kxf4 61. Kb4 b5 62. Kxb5 {Weighted Error Value: White=0.21/Black=0.18} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "5.3"] [White "Praggnanandhaa R"] [Black "Yip, Carissa"] [Result "1-0"] [ECO "E73"] [WhiteElo "2608"] [BlackElo "2430"] [Annotator "TA"] [PlyCount "103"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 11,103,25,59,47,59,60,44,42,54,50,60,12,12,23,14,16,17,11,20,10,37,28, 47,47,45,48,55,60,56,46,61,62,54,52,72,45,52,52,66,65,63,56,100,38,75,75,76,76, 76,76,201,171,266,264,514,496,470,508,496,446,474,489,487,0,454,474,474,536, 536,536,536,536,523,523,487,497,575,575,575,575,575,575,575,575,686,681,1245, 1110,875,673,2139,2137,2023,1790]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. Be2 d6 6. h4 e5 7. d5 {E73: King's Indian: Averbakh Variation without 6...c5.} c6 8. h5 cxd5 {...d4 is the strong threat.} 9. cxd5 {White is slightly better.} Nbd7 10. Be3 Nc5 {[#]} 11. h6 $146 ({Predecessor:} 11. Bf3 Qa5 12. Bxc5 Qxc5 13. Nge2 Ng4 14. Bxg4 Bxg4 15. hxg6 fxg6 16. f3 Bxf3 17. gxf3 Rxf3 {0-1 (57) Zorrilla Jimenez,W (2034)-Soto Lora,J (2025) Santo Domingo 2015}) 11... Bh8 12. Bxc5 dxc5 13. Nf3 Ne8 14. Nd2 Bd7 15. a4 Qg5 16. g3 Rd8 17. Qb3 b6 18. O-O-O Nd6 19. Kb1 Qe7 20. Nc4 Rb8 21. Nxd6 Qxd6 22. Bb5 Bg4 23. Rd3 Bf6 24. Qc4 Rfd8 25. Bc6 Qf8 26. f3 Bc8 27. Rhd1 ({Better is} 27. Nb5 $16) 27... Be7 28. Nb5 $36 {[%mdl 2048] Black is under strong pressure. White stays focused until the end. } Ba6 29. Qc1 Bxb5 30. axb5 Rd6 (30... Bd6 $16) 31. Ra3 $18 Qd8 (31... Rc8 $142 32. Rxa7 Rdd8) 32. Rxa7 Bg5 $2 (32... Bf6 {was necessary.} 33. Rf1 Rc8) 33. f4 Bxh6 34. Qc3 Bg7 35. fxe5 Qg5 {[#]} 36. Qf3 $1 {[%CAl Rf3f7]} Qxe5 {[%csl Gg7] [%CAl Re5b2]} 37. Qxf7+ Kh8 {[%csl Gg7][%CAl Re5b2] [#]} 38. Qxg7+ $1 {[%mdl 512] White is clearly winning.} Qxg7 39. Rxg7 Kxg7 {[%mdl 4096] Endgame KRR-KRB } 40. e5 Rdd8 41. d6 Kf7 {...Ke6 would now be nice for Black.} 42. Bd5+ Kg7 43. Bc4 Re8 44. e6 Rbd8 45. Kc2 Kf6 {Now ...Ke5 and Black clings on.} 46. e7 Rd7 47. Rf1+ Kg5 48. Rf8 Rexe7 49. dxe7 Rxe7 50. Rb8 Re3 51. Rxb6 Rxg3 52. Rc6 { Weighted Error Value: White=0.03/Black=0.26} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "5.2"] [White "Mendonca, Leon Luke"] [Black "Nihal Sarin"] [Result "1/2-1/2"] [ECO "D32"] [WhiteElo "2549"] [BlackElo "2620"] [Annotator "TA"] [PlyCount "63"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 20,63,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,12,0,30,0,9,0,0,0,16,0,0, 0,0,0,23,0,0,0,0,0,0,0,0,0]} 1. Nf3 d5 2. e3 Nf6 3. c4 e6 4. Nc3 c5 5. cxd5 exd5 6. d4 Nc6 7. Be2 cxd4 8. Nxd4 Bd6 9. O-O O-O 10. Nf3 a6 11. b3 Be6 { D32: Tarrasch Defence: Sidelines and lines without g3.} 12. Bb2 Qe7 13. Rc1 Rad8 14. Na4 Ne4 15. Bxa6 Nb4 {[#]} 16. Be2 $146 ({Predecessor:} 16. Qd4 f6 17. Be2 Nxa2 18. Ra1 Nb4 19. Rfc1 {1-0 (43) Milovanovic,R (2440)-Jelen,I (2405) Pula 1990}) 16... Nxa2 17. Ra1 Nb4 18. Nc3 {[%CAl Ba4c3,Bc3b5,Bb5d4][%mdl 32]} Nc6 {[%CAl Bb4c6,Bc6b4,Bb4a2][%mdl 32]} 19. Nb5 Bc5 20. Nbd4 Nb4 21. Rc1 h6 22. Bb5 (22. Ne5 $5 {[%CAl Rd4e6]}) 22... Na2 23. Rc2 Nb4 24. Rc1 Rc8 25. Be2 Na2 26. Rc2 Nb4 27. Rc1 Rfd8 28. Ne1 Na2 {The position is equal.} 29. Rc2 Nb4 30. Rc1 Na2 31. Rc2 Nb4 32. Rc1 {An uneventful encounter. Weighted Error Value: White=0.04/Black=0.04} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "5.1"] [White "Zhu, Jiner"] [Black "Keymer, Vincent"] [Result "0-1"] [ECO "B90"] [WhiteElo "2462"] [BlackElo "2591"] [Annotator "TA"] [PlyCount "98"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 23,98,0,0,0,0,0,15,0,0,0,14,0,0,0,47,39,66,65,66,65,66,66,69,39,34,34, 37,45,70,0,0,-38,70,62,52,44,64,73,77,-14,-4,-17,-14,-6,0,0,0,-21,22,20,51,76, 483,462,429,329,252,99,360,0,0,0,0,0,8,0,171,0,0,0,10,0,0,0,0,-29990,-29991]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nf3 Be7 8. a4 h6 9. O-O O-O 10. Be3 Be6 11. a5 Nbd7 12. Nd2 Qc7 13. Bf3 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.} Rfc8 14. Qe2 Qc6 15. Rfd1 {The position is equal.} Bd8 {[#]} 16. Ra3 $146 ({Predecessor:} 16. Nf1 b5 17. axb6 Nxb6 18. Ng3 Nc4 19. Bc1 Rab8 20. b3 Nb6 21. Bd2 a5 22. Be1 {1/2-1/2 (100) Prasanna Raghuram,R (2455)-Paragua,M (2500) Rockville 2017}) 16... Nf8 17. Rc1 N8h7 18. h4 Ne8 19. Nd5 Bxd5 20. exd5 Qd7 21. g3 f5 22. c4 Nef6 23. Nf1 e4 24. Bg2 Ng4 25. b4 Nhf6 26. Bd4 (26. Bh3 $14) 26... Nxd5 $1 $11 {[%mdl 64] Pin} 27. Qd2 {[#]} Ne7 ({Black should try} 27... Bf6 $1 $15) 28. f3 $14 exf3 29. Rxf3 Nc6 30. Bb2 Bf6 31. Qd5+ (31. Bxf6 $16 {Strongly threatening Bc3.} Nxf6 32. Ne3) 31... Kh8 32. Bxf6 Nxf6 33. Qxf5 Qc7 {And now ...Nd4 would win.} 34. Rf2 Rf8 35. Qb1 Ne5 36. Ne3 Rae8 37. Rcf1 Nxc4 $2 {[%mdl 8192]} (37... Qd8 $16 {is tougher.}) 38. Nd5 $18 Qf7 39. Nxf6 gxf6 40. Qa1 $2 (40. Rxf6 $18 { and the rest is easy.} Qxf6 41. Rxf6 Rxf6 42. Bxb7) 40... Re5 $2 {[%mdl 8192]} (40... Qg7 $16) 41. Qd4 $2 (41. Rxf6 $18 Qxf6 42. Rxf6 Rxf6 43. Bxb7) 41... Ne3 $11 42. Rxf6 $40 {[%mdl 128] White attacks.} Qxf6 43. Rxf6 Rxf6 44. Bxb7 Nf5 $2 (44... Rf1+ $1 $11 {and Black has nothing to worry.} 45. Kh2 Rf2+ 46. Kh3 h5) 45. Qc3 $2 (45. Qa1 $18 Rg6 46. b5 (46. Bxa6 Rxg3+ 47. Kf2 Rg4 $16) 46... Rxg3+ 47. Kf2) 45... Rg6 46. Kf2 Rxg3 47. Qc8+ Rg8 48. Qc3 Ne3 {Threatens to win with ...Nd1+.} 49. Bxa6 $2 {[%mdl 8192] [#]} (49. Qd3 $11) 49... Nd1+ {[%mdl 64] Double Attack. Black used his chance. Weighted Error Value: White=0.65/ Black=0.53} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "4.10"] [White "Nihal Sarin"] [Black "Zhu, Jiner"] [Result "1-0"] [ECO "A13"] [WhiteElo "2620"] [BlackElo "2462"] [Annotator "TA"] [PlyCount "53"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 19,53,0,17,0,0,0,0,0,0,0,16,24,35,15,36,22,31,9,50,37,34,6,41,0,69,62, 167,183,805,797,766,750,1082,741,712,705]} 1. Nf3 Nf6 2. c4 e6 3. e3 d5 4. b3 c5 5. Bb2 Nc6 6. cxd5 exd5 7. Bb5 Bd7 8. O-O Bd6 9. d4 cxd4 10. Nxd4 O-O 11. Nf3 $5 {[%mdl 4] Exploring less charted territory. A13: English Opening: 1... e6.} a6 12. Be2 Be6 13. Nc3 {[%CAl Bb1c3,Bc3a4,Ba4c5,Bc5d3,Bd3f4,Bf4d5,Bd5e7, Be7c8][%mdl 32] The position is equal.} Rc8 14. Rc1 Bb8 15. Na4 Ne4 16. Nc5 { [#]} Qe7 $146 ({Predecessor:} 16... Bg4 17. Nd3 Re8 18. Nd4 Qd6 19. f4 Bxe2 20. Qxe2 f6 21. Qg4 Rcd8 22. Rf3 Nxd4 23. Bxd4 Qd7 24. Qh4 Qe7 25. Rh3 g6 26. Nf2 Rf8 27. Ng4 Qd7 {1-0 (26) Moiseev,M-Melnikov,D Volgograd 1996}) 17. Nd3 Rfd8 18. Nd4 Ba7 (18... Nxd4 {keeps more tension.} 19. Bxd4 Qh4 20. f4 Rxc1 21. Qxc1 Bf5) 19. Nxc6 bxc6 20. Nf4 Bf5 $1 21. Bg4 Bxg4 (21... Nxf2 $11 22. Rxf2 Qxe3) 22. Qxg4 $14 {[%csl Gb2][%CAl Rg4g7]} f6 {[#]} ({Black should try} 22... Qg5 $14 23. Qxg5 Nxg5) 23. Nxd5 $1 $18 {[%mdl 576] Pin} Qe8 (23... Qd7 24. Qxe4 cxd5) 24. Bxf6 {[%csl Gf6][%CAl Rg4g7][%mdl 64] Double Attack. White is clearly winning.} Rd7 {[#]} 25. Ne7+ $1 {[%mdl 64] Double Attack, Pin} Kf7 ( 25... Rxe7 26. Bxe7) 26. Nxc8 Nxf6 27. Qc4+ {[%mdl 64] Double Attack. Weighted Error Value: White=0.16/Black=0.25} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "4.9"] [White "Yip, Carissa"] [Black "Mendonca, Leon Luke"] [Result "0-1"] [ECO "E05"] [WhiteElo "2430"] [BlackElo "2549"] [Annotator "TA"] [PlyCount "98"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 15,98,13,13,0,0,9,20,16,20,13,29,0,16,10,19,18,14,3,13,0,11,0,16,0,0,0, 0,0,8,0,10,0,11,-57,-56,-187,-188,-191,-198,-371,-365,-341,-166,-170,-193,-304, 0,0,0,0,0,-197,-206,-231,-228,-199,-199,-201,-21,-25,-25,-39,-31,-263,0,-77, -87,-760,-706,-627,-140,-141,-141,-1335,-1313,-1143,-603,-714,-229,-187,-18, -18,-18,-29991,-29992]} 1. Nf3 Nf6 2. g3 d5 3. Bg2 e6 4. O-O Be7 5. c4 O-O 6. d4 dxc4 7. Qc2 a6 8. a4 Bd7 9. Rd1 {E05: Open Catalan: 5 Nf3 Be7.} Bc6 10. Bg5 Nbd7 11. Qxc4 {The position is equal.} h6 12. Bxf6 Nxf6 13. Nc3 a5 14. Ne5 Bxg2 15. Kxg2 c6 16. e4 Qb6 17. Qe2 Rfd8 {[#]} 18. Nc4 $146 ({Predecessor:} 18. Nf3 Bb4 19. Rac1 Qa6 20. Qc2 Rac8 21. e5 Nd5 22. Ne4 Be7 23. b3 Nb4 24. Qc4 Qxc4 25. bxc4 {1/2-1/2 (68) Melkumyan,H (2632)-Hansen,E (2573) London 2015}) 18... Qc7 19. e5 Nd5 20. Ne4 Nb6 21. Ne3 Rd7 22. Qg4 Kh8 23. Qh5 Bf8 24. f4 ({ White should try} 24. Nc5 $11) 24... Rad8 $15 25. Ng5 ({Better is} 25. f5 $1 $15) 25... Kg8 $1 $19 26. Nf3 c5 $1 27. Rac1 $2 (27. f5 {was worth a try.}) 27... Qc6 $1 28. f5 exf5 (28... Nxa4 29. d5 $15) (28... Rxd4 $142 29. Rxd4 Rxd4 ) 29. Nxf5 Qe6 30. Qg4 (30. Nd6 $142 g6 31. Qh3 Rxd6 32. exd6 Qe2+ {[%mdl 64] Double Attack} 33. Kg1 Qxf3 34. dxc5) 30... cxd4 $2 (30... Nxa4 31. Rd2 $17) ( 30... Nd5 $19 {Strongly threatening ...Qxf5!} 31. N3h4 g6) 31. N3xd4 $11 ({ Don't play} 31. Rxd4 Nd5 $17) 31... Qxe5 32. Nxh6+ $1 Kh7 33. Nhf5 (33. Nxf7 $1 $11 {and White has nothing to worry.} Rxf7 34. Qh4+ {[%mdl 64] Double Attack} Kg8 35. Qxd8 Qe4+ 36. Kg1 Qe3+ 37. Kh1 Qe4+ 38. Kg1 Qe3+ 39. Kh1 Qe4+ 40. Kg1) 33... g6 $19 34. Re1 Qf6 35. Rf1 gxf5 ({Inferior is} 35... Nxa4 36. Rc4 $11 ( 36. Qh3+ Kg8 $11)) 36. Nxf5 Qg6 (36... Rd2+ $1 $19 37. Kg1 Nd7) 37. Qh4+ $11 Kg8 38. Rf4 $1 {[%CAl Rf4g4] aiming for Rg4.} Rd2+ 39. Kh3 $2 {[#]} (39. Kg1 $15 R8d5 40. Rcf1) 39... R8d5 $2 (39... Qh7 $1 $19 40. Rg4+ Kh8) 40. Rg4 Rxf5 $17 41. Rxg6+ $4 {[%mdl 8192]} (41. Rc7 $17 Rd7 42. Rxg6+ fxg6 43. Rxd7 Nxd7 44. Qc4+ Rf7 45. Qe4) 41... fxg6 $19 42. Qe4 Rh5+ $2 (42... Nd5 $19 43. Qe6+ Kg7) 43. Kg4 $17 Rd6 44. Rc7 $2 {[%mdl 8192]} (44. h4 $17) 44... Nd5 $19 45. Qc4 Rf5 {...Re6 is the strong threat.} 46. Rxb7 Kh8 $2 (46... Re6 {And now ... Ne3+ would win.} 47. Kh3 Rh5+ 48. Qh4 Rxh4+ 49. Kxh4 Be7+ 50. Kg4 Re4+ 51. Kf3 Rxa4) 47. Qe2 {[#]} Bg7 $2 (47... Nf6+ $1 $19 48. Kh3 Rh5+ 49. Kg2 Rhd5) 48. Qe8+ $1 $11 Kh7 {Threatens to win with ...Nf6+.} 49. Rb8 $2 {[%mdl 8192]} (49. Kh3 $11) 49... Nf6+ {[%mdl 64] Double Attack. Weighted Error Value: White=0.79/ Black=0.62} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "4.8"] [White "Abdusattorov, Nodirbek"] [Black "Praggnanandhaa R"] [Result "1-0"] [ECO "E20"] [WhiteElo "2634"] [BlackElo "2608"] [Annotator "TA"] [PlyCount "119"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 10,119,0,0,0,0,0,0,13,0,0,8,0,0,12,0,0,-9,0,0,0,0,0,0,8,10,17,7,0,0,0,0, 2,0,0,-4,0,-10,-22,-23,-10,-17,-15,-15,0,0,56,0,10,10,10,14,28,28,28,28,29,21, 20,0,0,1,2,-3,0,-6,0,-12,-2,-4,0,0,10,38,60,70,70,70,62,64,159,159,158,146,223, 220,229,237,235,237,254,250,484,470,1161,1113,762,745,667,566,1328,933,1471, 1449,1644,1643,29971,29972,29970,29969,29977,29978]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. g3 O-O 5. Bg2 Bxc3+ 6. bxc3 d6 {E20: Nimzo-Indian: 4 g3 and 4 f3.} 7. Nf3 Nc6 {The main line 7...Nc6 scores better than 7...Nbd7.} 8. Qd3 e5 { [#] Hoping for ...e4.The position is equal.} 9. Nd2 Qe7 10. O-O Re8 11. e4 b6 { [#]} 12. Re1 $146 ({Predecessor:} 12. Ba3 Ba6 13. f4 Qd7 14. h3 Na5 15. Bb4 Nxc4 16. Nxc4 Qb5 17. fxe5 dxe5 18. Rxf6 gxf6 {1-0 (49) Ioannidis,E (2411) -Khanin,S (2506) Europe Echecs INT 2021}) 12... Ba6 13. Ba3 Nd7 14. f4 Qf6 15. Bh3 Bc8 {[%CAl Re5d4]} 16. Bxd7 Bxd7 17. fxe5 dxe5 18. d5 Na5 19. Nb3 Nb7 20. c5 bxc5 21. Nxc5 Nxc5 22. Bxc5 Qg6 23. Rf1 h5 24. c4 Bh3 25. Rf2 a5 26. Ba3 Rad8 27. Re1 h4 (27... c6 $11) 28. c5 (28. Kh1 $14) 28... hxg3 29. Qxg3 Qxg3+ 30. hxg3 f5 31. Rd2 fxe4 32. Rxe4 Bf5 33. Re1 e4 34. Kf2 Re5 35. d6 cxd6 36. cxd6 Bd7 37. Ke3 Rde8 38. Rd4 Rg5 39. Rg1 Rg4 40. Bb2 Re6 41. Rd5 a4 42. Be5 Rg5 43. Kd4 Re8 44. Re1 Be6 {White stays focused until the end.} (44... Rg4 $14 ) 45. Rc5 $16 Rd8 46. a3 Bf5 (46... Rd7 $16 47. Rc8+ (47. Rxe4 Kf7 $18) (47. Kxe4 Rg4+ 48. Ke3 Rg5 $16) 47... Kf7) 47. Bf4 $18 Rh5 48. Rxe4 Bxe4 49. Rxh5 { [%mdl 4096] Endgame KRB-KRB} Bg6 50. Ra5 Kf7 $2 (50... Be8 {was worth a try.} 51. Kc5 Kf8) 51. Ra7+ Kf6 (51... Kf8 $142 52. Ke5 Re8+ 53. Kd5 Be4+ 54. Kc5 Bf5 ) 52. Be5+ Kf5 53. Rxg7 Bh5 54. Bf4 {[#] aiming for Rg5+.} Bd1 55. Kc5 Bf3 56. Re7 Kf6 57. Be5+ Kf5 58. d7 {White mates.} Rxd7 59. Rxd7 Kxe5 60. Rd4 { Weighted Error Value: White=0.02/Black=0.29} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "4.7"] [White "Murzin, Volodar"] [Black "Bjerre, Jonas Buhl"] [Result "1-0"] [ECO "B53"] [WhiteElo "2502"] [BlackElo "2542"] [Annotator "TA"] [PlyCount "103"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,103,6,6,5,8,10,10,10,16,5,36,0,0,5,35,13,60,57,68,68,52,58,66,39,93, 102,146,158,147,144,159,159,153,158,167,108,117,110,120,114,116,112,118,94,87, 86,115,120,106,103,100,106,105,56,66,65,67,62,76,78,109,56,62,41,38,34,76,63, 226,188,264,131,339,312,361,376,412,418,716,710,706,679,726,633,677,639,641, 615,627,618,582,573,29976,29977,29969,29967]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Qe3 Nf6 6. Be2 {B53: Sicilian: 2...d6: Lines with Qxd4.} g6 7. O-O Bg7 8. Rd1 {The position is equal.} O-O 9. Nc3 Ng4 10. Qf4 {[#]} Nge5 $146 ({ Predecessor:} 10... Bd7 11. Nd5 Nge5 12. Nxe5 dxe5 13. Qh4 Nd4 14. Nxe7+ Kh8 15. Bd3 Be8 16. c3 Nc6 {0-1 (47) Murzin,V (2478)-Oparin,G (2652) Chess.com INT 2021}) 11. Nxe5 Nxe5 12. Qh4 a6 13. Nd5 Nc6 14. Bg5 {[%CAl Rd5e7]} Re8 15. c3 Be6 16. Rd2 Rc8 ({Better is} 16... Bxd5 $14 17. exd5 (17. Rxd5 Qc7 $11) 17... Ne5) 17. Nf4 $16 Ne5 18. Nxe6 fxe6 {[#]} 19. Qh3 $1 Qd7 20. f4 Nf7 21. Bg4 Nd8 (21... Nxg5 $2 22. fxg5 Kh8 23. Bxe6 $18) 22. f5 (22. Rf1 $18) 22... exf5 23. exf5 h5 24. Bf3 {Threatens to win with Bd5+.} Qxf5 25. Qxf5 gxf5 26. Rf1 Nf7 27. Be3 ({Reject} 27. Bxh5 Nxg5 28. Rxf5 (28. Bxe8 Rxe8 29. Rxf5 Bf6 $15) 28... Bf6 $15) (27. Bxb7 $2 Rc7 $19) 27... Bh6 28. Bxh6 Nxh6 29. Bxb7 Rc7 30. Bf3 h4 31. Re2 Rb8 32. Bd5+ Kg7 33. Rf4 e5 34. Rxh4 Ng4 35. h3 (35. Rh3 $16) 35... Nf6 $14 36. Be6 (36. Bb3 {feels hotter.} Kg6 37. Ra4 Rb6 38. Bc2 e4 39. Bb3) 36... f4 37. Bf5 Rcb7 38. b3 $36 {[%mdl 2048] White fights for an advantage.} Nd5 $2 (38... Kf7 $14) 39. c4 Nf6 (39... Ne3 $142 40. Be4 d5) 40. g3 (40. c5 $1 $18 { and the rest is easy.}) 40... f3 $2 {A mistake that costs the game.} (40... fxg3 $16 41. Re3 Kf7) 41. Rf2 a5 42. g4 ({But not} 42. Rxf3 a4 $18) 42... a4 43. g5 Ng8 (43... axb3 $142 44. axb3 Ne8 45. Rh7+ Kf8 46. Rxb7 Rxb7 47. Rxf3 Kg8) 44. Rxf3 Ne7 45. Be4 axb3 46. Rh7+ Kg8 47. axb3 Ra7 48. g6 Ra1+ 49. Kh2 Re1 {[#]} 50. g7 $1 {aiming for Rg3.} Rc8 {[#]} (50... Re2+ 51. Kg1) 51. Rg3 $1 Re2+ 52. Kg1 {Weighted Error Value: White=0.12/Black=0.39} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "4.6"] [White "Khademalsharieh, Sarasadat"] [Black "Lei, Tingjie"] [Result "1/2-1/2"] [ECO "D38"] [WhiteElo "2494"] [BlackElo "2505"] [Annotator "TA"] [PlyCount "75"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 18,75,8,7,9,-15,13,0,6,-36,-13,-17,-15,-18,-8,-8,-8,-8,-8,-8,-8,-8,-8, -8,-7,-7,-5,-5,-6,-7,-8,-8,-6,-6,-12,-12,0,0,0,0,0,-10,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0]} 1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. Nc3 Bb4 5. Bg5 h6 6. Bxf6 Qxf6 7. cxd5 exd5 8. Qb3 c5 9. a3 Bxc3+ 10. Qxc3 c4 {D38: Queen's Gambit Declined: Ragozin Defence (4 Nf3 Bb4).} 11. e3 Be6 12. b3 {[%CAl Rb3c4]} O-O 13. Ne5 $1 { [%CAl Rb3c4][%mdl 4] [#] 13.Ne5 is a critical line.} Rc8 $146 ({Predecessor:} 13... Nd7 14. bxc4 dxc4 15. Nxd7 Bxd7 16. Bxc4 Rac8 17. Qb3 Qc6 18. Bd5 Qb5 19. Qxb5 Bxb5 {1-0 (57) Kozak,A (2518)-Yilmaz,M (2630) Tornelo INT 2021}) 14. Be2 { [%CAl Rb3c4] The position is equal.} Nd7 15. O-O cxb3 16. Qxb3 Nxe5 17. dxe5 Qxe5 18. Qxb7 d4 19. Qb2 $1 Rc3 20. exd4 Qxd4 21. Rfd1 Qc5 22. Rac1 Rc8 { [%CAl Rc3c1]} 23. Rd8+ Rxd8 24. Qxc3 Qg5 25. Rd1 Rc8 26. Qd4 a5 27. h4 Qe7 28. a4 Bb3 29. Rd2 Rc1+ 30. Kh2 $1 Qc7+ 31. Qd6 Qxd6+ 32. Rxd6 Bxa4 $11 {[%mdl 4096] Endgame KRB-KRB} 33. Rd5 Kf8 (33... Bc6 {is more complex.} 34. Rd8+ Kh7 35. Rc8 a4 36. Bf3 a3) 34. Rxa5 Bd7 35. Bf3 Rc2 36. Kg3 Rc3 37. Ra7 Ke7 38. Kh2 {An uneventful encounter. Weighted Error Value: White=0.03/Black=0.03} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "4.5"] [White "Liang, Awonder"] [Black "Abdumalik, Zhansaya"] [Result "1-0"] [ECO "A34"] [WhiteElo "2592"] [BlackElo "2472"] [Annotator "TA"] [PlyCount "75"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 12,75,0,0,0,0,0,-8,-14,-20,23,30,54,34,33,0,0,-14,110,91,90,88,75,40,93, 50,52,36,41,39,102,74,108,118,353,344,335,337,302,286,568,591,724,498,690,672, 845,837,1636,1600,1716,1239,1217,1267,2282,1167,29977,6434,2564,2477,2455,2497, 29990,29988,29993,29990]} 1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nf4+ {A34: Symmetrical English: 2 Nc3, lines with ...d5.} 8. Kf1 {Strongly threatening d4.} Nd3 9. h4 $5 {[%mdl 4] Exploring less charted territory.} (9. Ke2 {is more complex.}) 9... e6 {[#] The position is equal.} 10. Rh3 $146 ({Predecessor:} 10. Qe2 Nxc1 11. Rxc1 Be7 12. e5 Nc6 13. Bd3 Bd7 14. Rh3 Rc8 15. Qe3 Qb6 16. b3 {1-0 (29) Ribli,Z (2537)-Almasi,I (2401) Hungary 2018}) 10... Nf4 11. Rg3 Nh5 12. Rg5 g6 13. Ne5 {And now Rxh5 would win.} Bg7 14. d3 (14. Rxh5 $5 gxh5 15. Qxh5 $11) 14... h6 (14... O-O $11 { keeps the balance.}) 15. Rxh5 $40 {[%mdl 128] White has strong attack.} gxh5 16. Qxh5 {[%csl Ge5][%CAl Rh5f7]} Qf6 17. Bb5+ {[%mdl 1024] White has strong compensation.} Kf8 (17... Bd7 $14 18. Nxd7 Nxd7) 18. Nf3 ({Weaker is} 18. Nxf7 Qxf7 19. Qxc5+ Qe7 $17) 18... Qe7 19. a4 (19. Be3 $5 {[%CAl Re3c5]} b6 20. Ne5 $11) 19... a6 20. Bc4 Nc6 ({Black should try} 20... b6 $14) 21. e5 Rb8 22. Ne4 b5 $2 {A mistake that costs the game.} (22... Na5 $16) 23. axb5 axb5 {[#]} 24. Be3 $1 Kg8 25. Bb3 ({Not} 25. Bxc5 Qd8 $16) 25... c4 (25... Nd4) 26. dxc4 $18 bxc4 27. Bxc4 Qb4 28. b3 {[%CAl Bb2b3,Bb3b4][%mdl 32]} Rh7 29. Kg1 Na5 30. Bc5 Qb7 31. Nd6 Qc7 {[#]} 32. Rxa5 $1 {[%mdl 512]} Bf8 (32... Bb7 33. Nxb7) 33. b4 Qc6 34. Bd3 Rg7 35. Be4 Qc7 36. Ra7 Qd8 37. Rxf7 Ba6 {[#]} 38. Ng5 $1 { Weighted Error Value: White=0.19/Black=1.00} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "4.4"] [White "Salimova, Nurgyul"] [Black "Shuvalova, Polina"] [Result "1-0"] [ECO "E11"] [WhiteElo "2395"] [BlackElo "2489"] [Annotator "TA"] [PlyCount "79"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,79,13,0,0,20,18,8,0,0,-12,-8,-19,-15,-15,-15,-15,-10,-22,-22,-22,11,0, -4,-25,52,28,71,25,79,79,89,80,82,83,79,75,77,84,78,83,109,108,113,105,114,102, 101,99,91,93,92,86,87,87,108,101,127,87,94,92,129,96,157,105,868,856,856,829, 1625,235,1526,1489]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Bb4+ 5. Bd2 Be7 6. Bg2 {E11: Bogo-Indian.} Nbd7 7. O-O c6 8. Nc3 {The position is equal.} dxc4 9. e4 b5 10. d5 cxd5 11. exd5 exd5 {aiming for ...b4.} 12. Nd4 Bb7 13. Ncxb5 O-O 14. Nf5 Bc5 15. Bc3 Qb6 16. Nbd4 {[#]} (16. Qd2 $5 {[%CAl Rd2g5]}) 16... Rae8 $146 (16... Rfd8 $11) ({Predecessor:} 16... Rfe8 17. b4 Bf8 18. a4 Ne4 19. Be1 Ne5 20. a5 Qf6 21. Ra3 Nd3 22. Rxd3 cxd3 23. Qxd3 {0-1 (37) Ivanisevic,I (2664) -Efimenko,Z (2670) Subotica 2008}) 17. b4 $1 $14 {[%CAl Rb4c5]} cxb3 ({Not} 17... Bxb4 $2 18. Bxb4 Qxb4 19. Rb1 $18) 18. Nxb3 Bb4 (18... Ba6 $11) 19. Bd4 $16 {[%mdl 1024] White has strong compensation.} Qe6 20. Bh3 {[#] Hoping for Nh6+!} Kh8 21. a3 Bd6 22. Re1 Qxe1+ 23. Qxe1 Rxe1+ 24. Rxe1 Bxa3 25. Ra1 Bb4 26. Rxa7 {Black must now prevent Nxg7.} Bc6 {[#]} 27. Nxg7 $1 {[%mdl 512]} Kxg7 28. Bxd7 Bxd7 29. Rxd7 Kg6 30. Bxf6 Kxf6 31. Rxd5 {[%mdl 4096] Endgame KRB-KRN} Re8 32. Nd4 Bc3 33. Nc2 Kg6 34. Ne3 Bf6 35. h4 Re6 (35... Re5 $142) 36. Kg2 ( 36. h5+ $142 Kg7 37. Nf5+ Kf8 38. Ra5) 36... Be5 $2 {[%mdl 8192] Loses the game.} (36... h5 $16 37. Kf3 Rb6) 37. f4 $18 Bxf4 38. h5+ ({Weaker is} 38. gxf4 Rxe3 39. Rg5+ Kf6 $11) 38... Kh6 39. Ng4+ Kg7 40. gxf4 {Weighted Error Value: White=0.07/Black=0.20} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "4.3"] [White "Badelka, Olga"] [Black "Mammadzada, Gunay"] [Result "0-1"] [ECO "A11"] [WhiteElo "2418"] [BlackElo "2443"] [Annotator "TA"] [PlyCount "34"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,34,1,29,33,30,7,5,-3,6,7,4,-66,-34,-24,-21,-143,-135,-202,-201,-187, -177,-197,-192,-177,-175,-163,-182]} 1. Nf3 d5 2. g3 c6 3. Bg2 Bg4 4. c4 Nf6 5. Ne5 Be6 (5... Bh5 {keeps more tension.} 6. cxd5 cxd5 7. O-O e6 8. Qa4+ Nbd7) 6. cxd5 {A11: English Opening: 1...c6.} Bxd5 7. f3 Nbd7 8. d4 {[#] The position is equal.} Nxe5 $146 ({Predecessor:} 8... Qb6 9. Bh3 Rd8 10. Nxd7 Nxd7 11. Qa4 e5 12. Nc3 Bb4 13. Kf2 Qxd4+ 14. e3 Qc4 {0-1 (54) Hickl,J (2613)-Carron,J (2411) Switzerland 2009}) 9. dxe5 Nd7 10. e4 (10. Nc3 $11) 10... Bc4 11. Qd4 Ba6 12. Nc3 {[#]} (12. e6 $11 {remains equal.} fxe6 13. Bf1) 12... e6 $1 $36 { [%mdl 2048] aiming for ...Bc5. Black is really pushing.Black is clearly better. } 13. Bf4 {[#]} (13. f4 $17 {was called for.}) 13... g5 $1 $19 14. Be3 Bc5 15. Qd2 Bxe3 16. Qxe3 Nxe5 {Strongly threatening ...Nd3+.} 17. Bf1 Bxf1 {[%mdl 64] Decoy. Weighted Error Value: White=0.33/Black=0.05} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "4.2"] [White "Gukesh D"] [Black "Saduakassova, Dinara"] [Result "1/2-1/2"] [ECO "E12"] [WhiteElo "2578"] [BlackElo "2500"] [Annotator "TA"] [PlyCount "153"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 18,153,39,34,29,31,34,38,50,36,94,74,126,43,147,138,141,25,19,29,14,14, 20,17,47,55,77,28,59,54,46,47,66,31,20,20,26,13,47,0,26,0,33,43,54,46,37,40,36, 0,0,0,57,70,69,-4,0,-14,-4,-5,0,-28,-7,-4,-2,-54,-43,-150,-145,-155,0,-136, -147,-157,-140,-299,-263,-280,-292,-307,-154,-268,-278,-283,-205,-210,-167, -168,-116,-195,-65,-140,-37,-219,0,0,0,0,0,0,0,0,0,-2,0,0,0,0,0,0,0,0,0,-301, -301,-658,-597,-671,-490,-490,-287,-633,-8,-185,-8,-8,-8,-8,-8,-8,-8,-8,0,-8, -8,-8,0,-56]} 1. d4 Nf6 2. Nf3 e6 3. c4 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 Nxd5 7. Qc2 c5 8. e4 Nxc3 9. bxc3 Be7 10. Bb5+ Bc6 {E12: Queen's Indian: Unusual White 4th moves, 4 a3, 4 Nc3 Bb7 5 a3 and 4 Nc3 Bb7 .} 11. Bd3 O-O 12. O-O cxd4 { White is slightly better.} 13. cxd4 {[#]} Qe8 $146 (13... Bb7 $14) ({ Predecessor:} 13... Bb7 14. Rd1 Qc8 15. Qe2 Ba6 16. e5 Bxd3 17. Rxd3 Qc4 18. Bg5 Bxg5 19. Nxg5 Nd7 20. Nxh7 {1/2-1/2 (37) Lashkin,J (2368)-Soltanici,R (2409) Kishinev 2020}) 14. d5 $16 Ba4 (14... Bb5 $142) 15. Qb1 (15. Qc4 $16) 15... exd5 (15... h6 $14) 16. exd5 h6 {[#]} 17. Bf4 (17. Bxh6 $1 $16 {[%mdl 512]} gxh6 18. Re1) 17... Nd7 $11 18. d6 Bf6 19. Re1 Qd8 20. Ra2 Nc5 21. Bc4 Bd7 22. h3 (22. Rd2 {seems wilder.} Re8 23. Be5 Bg4 24. Re3 Nd7 25. Qg6) 22... Be6 23. Bxe6 Nxe6 24. Bg3 Rc8 25. Qb5 Rc5 26. Qa4 Ra5 27. Qb3 Qd7 28. Rc2 Rc5 29. Rce2 Rfc8 30. Be5 {And now Bxf6 would win.} Qb5 ({Don't play} 30... Bxe5 31. Nxe5 Qxd6 32. Nxf7 $1 $16 {[%mdl 512]}) 31. Qxb5 Rxb5 32. Bxf6 gxf6 33. d7 Rd8 34. Nd4 Re5 (34... Rd5 $11 35. Nxe6 fxe6) 35. Rxe5 $14 fxe5 {[%mdl 4096] Endgame KRN-KRN} 36. Nf5 (36. Rxe5 $14 Rxd7 37. Nxe6) 36... Rxd7 37. Nxh6+ Kg7 38. Nf5+ Kf6 39. Ne3 Rd3 40. Ng4+ {[%mdl 64] Discovered Attack} Kg7 41. a4 (41. Re3 $11 Rxe3 42. Nxe3) 41... Ra3 $1 $15 42. Re4 {[#]} (42. Nxe5 $15 Rxa4 43. Re3) 42... f6 $1 $17 43. Ne3 Kf7 $2 (43... Nc5 $17 44. Rg4+ Kf7) 44. Nc4 (44. Rh4 $1 $11) 44... Ra1+ 45. Kh2 Nc5 46. Re3 (46. Re2 $17) 46... Rxa4 $19 47. Nd6+ Ke6 48. Nb5 Ra2 (48... a6 $19 49. Nc7+ Kd6 50. Ne8+ Ke7) 49. Kg1 (49. f4 $17) 49... a5 50. h4 Rd2 51. h5 Rd7 52. g4 a4 (52... Kf7 $19 53. Kg2 a4) 53. Kh2 (53. f4 $17) 53... Nd3 (53... Kf7 $19 54. Ra3 Rd5) 54. Kg3 (54. Re4 $1 $15) 54... Nf4 ({Black should play} 54... Kf7 $17 55. f3 Kg7) 55. f3 $2 ({Only move: } 55. Re4 $1 $15) 55... Rd3 $2 (55... Rd2 $19 {aiming for ...Rg2+.} 56. Ra3 Rb2 57. Nd4+ Kf7) 56. Re4 $1 $11 a3 57. Ra4 Ne2+ 58. Kf2 Nc3 59. Nxc3 Rxc3 {KR-KR} 60. Ra7 b5 61. h6 b4 62. h7 Rc8 {Strongly threatening ...Rh8.} 63. Ra4 $1 Rh8 64. Rxb4 Rxh7 65. Ra4 $2 {[%mdl 8192]} (65. Rb6+ $11 Kf7 66. Kg2) 65... Rh2+ $19 66. Ke3 $2 (66. Kg3 Ra2 67. Ra6+ Kf7 68. g5 fxg5 69. Kg4) 66... a2 67. Ke4 Re2+ 68. Kd3 Rb2 69. Ke3 $2 (69. Ra5) 69... Kf7 $2 ({Black should try} 69... Kd5 $19 {White must now prevent ...Kc5.} 70. Kd3 Kc5) 70. Ra8 $2 (70. Ra7+ $1 $11 {and White has nothing to worry.} Ke6 71. Ra5) 70... Kg6 $2 ({Better is} 70... Ke7 $19 {next ...Kd6 is good for Black.} 71. Ra6 Kd7) 71. Rg8+ $11 { The position is equal.} Kh6 72. Ra8 Kg5 {...Kh4 is the strong threat.} 73. Ke4 $1 Re2+ 74. Kd3 Rb2 75. Ke4 $1 Kg6 {Hoping for ...Re2+.} 76. Ra7 Kg5 77. Ra8 { What a fight! Weighted Error Value: White=0.38/Black=0.32} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "4.1"] [White "Keymer, Vincent"] [Black "Yoo, Christopher Woojin"] [Result "1/2-1/2"] [ECO "D35"] [WhiteElo "2591"] [BlackElo "2457"] [Annotator "TA"] [PlyCount "89"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,89,14,16,21,21,0,0,0,5,0,9,0,0,0,98,109,103,84,131,133,114,100,134, 101,97,70,112,34,38,35,47,35,54,26,73,84,58,25,28,11,25,23,24,31,62,23,78,87, 69,18,33,25,18,9,30,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 h6 5. cxd5 exd5 6. Bf4 {D35: Queen's Gambit Declined: Exchange Variation.} Bd6 $1 {6...Bd6 is better than 6...c6.} 7. Bg3 O-O 8. e3 c6 9. Bd3 Bg4 10. Qc2 Bxg3 11. hxg3 {[#]} Bxf3 $146 (11... Re8 $11 { remains equal.}) ({Predecessor:} 11... Re8 12. Ne5 Nbd7 13. Nxg4 Nxg4 14. Qe2 Ngf6 15. Qf3 Qe7 16. g4 Ne4 17. Bxe4 dxe4 {0-1 (50) Cofman,V (1913)-Bashylin,S Playchess.com INT 2008}) 12. gxf3 $16 c5 13. dxc5 Nbd7 14. O-O-O Nxc5 15. g4 Nxd3+ 16. Rxd3 Rc8 17. Kb1 Qa5 18. g5 (18. Rhd1 $16) 18... hxg5 $14 {[#]} 19. Rxd5 $1 Rc5 20. Rd4 Qc7 21. f4 (21. Qd2 {feels hotter.} Re8 22. Qd3 Rc8 23. Qf1 Qe5 24. Rd3) 21... g6 22. fxg5 Rxg5 23. Rdh4 Rh5 24. Qa4 Qc5 25. Rxh5 Nxh5 26. Qd7 Kg7 27. a3 {[%CAl Ba2a3,Ba3a4,Ba4a5,Ba5a6,Ba6a7][%mdl 32]} Nf6 (27... Qb6 $11) 28. Qxb7 $16 Qf5+ 29. Ka1 ({White should try} 29. Ka2 $14) 29... Qxf2 $11 30. Qxa7 Re8 31. a4 Rxe3 {[#] Hoping for ...Re1+.} 32. Rd1 Qf3 {aiming for ... Rxc3.The position is equal.} 33. Qd4 g5 34. Rg1 Kg6 35. a5 g4 36. a6 Re6 37. a7 Ra6+ 38. Kb1 Qf5+ 39. Kc1 {Black must now prevent b4.} Qg5+ 40. Kc2 Qf5+ 41. Kd2 Qg5+ $1 42. Kc2 Qf5+ 43. Kd2 Qg5+ $1 44. Kd1 {And now Qd3+ would win.} Qf5 45. Kd2 {Weighted Error Value: White=0.13/Black=0.13} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "3.10"] [White "Saduakassova, Dinara"] [Black "Yoo, Christopher Woojin"] [Result "1/2-1/2"] [ECO "E05"] [WhiteElo "2500"] [BlackElo "2457"] [Annotator "TA"] [PlyCount "151"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 13,150,20,12,24,13,5,16,45,39,38,36,29,35,21,14,-52,-63,-50,-52,-45,-43, -30,0,0,0,0,0,0,0,-13,6,0,0,0,0,0,0,0,0,0,53,21,61,61,81,81,80,0,2,0,0,0,64,64, 81,81,81,81,81,0,84,70,102,116,212,205,225,224,207,99,186,186,198,104,213,203, 450,400,422,415,447,342,287,237,401,385,1254,415,375,0,12786,12790,29963,871, 12790,6107,5222,1218,1070,809,784,774,754,689,645,606,551,0,105,105,105,105, 105,105,105,105,105,105,105,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 { Nielsen,Peter Heine} Nf6 2. Nf3 d5 3. c4 e6 4. g3 Be7 5. Bg2 O-O 6. O-O dxc4 7. Qc2 b5 8. a4 {E05: Open Catalan: 5 Nf3 Be7.} b4 9. Nfd2 Nd5 $1 {[%mdl 4] outshines the older 9...c6.} 10. Nxc4 c5 11. dxc5 Ba6 12. Ne3 Nd7 $1 13. Nxd5 exd5 {[#]} 14. Nd2 $146 (14. c6 $11 Rc8 15. Bf4 (15. Bxd5 Ne5 $11)) ({ Predecessor:} 14. c6 Rc8 15. Bf4 Nc5 16. c7 Qd7 17. Nd2 g5 18. Be5 f6 19. Bd4 Rxc7 20. Qd1 {0-1 (59) Ding,L (2805)-Carlsen,M (2875) Zagreb 2019 CBM 191 [Nielsen,Peter Heine]}) 14... Nxc5 $15 15. Nf3 Rc8 16. Be3 b3 17. Qd1 Bf6 18. Bd4 Re8 19. Re1 Bc4 20. Bf1 Ne6 21. e3 Bxf1 (21... Nxd4 {keeps more tension.} 22. Nxd4 Qd7 23. Bg2 g6 24. Qd2 h5) 22. Rxf1 Rc2 23. Qd3 Bxd4 24. Nxd4 Nxd4 25. Qxd4 a5 26. Rad1 Qd7 ({Better is} 26... Qa8 $11) 27. Qxd5 Qxa4 28. Ra1 $1 { [%CAl Ra1a4]} Qb4 29. Rxa5 Rxb2 30. Ra7 (30. Rfa1 $16 Qd2 31. Qxd2 Rxd2 32. Rb5 ) 30... Rf8 $11 31. Rb7 Qc3 32. Rd1 $40 {[%mdl 128] White is up to no good.} Qc2 (32... h6 $11) 33. Qf3 $14 Rb1 34. Rxb1 Qxb1+ $16 {[%mdl 4096] Endgame KQR-KQR} 35. Kg2 b2 {White must now prevent ...Qc2.} 36. Qd5 ({White should play} 36. Rb4 $16) 36... h5 (36... Qc2 $11 {remains equal.} 37. Qb3 Qe4+ 38. f3 b1=Q 39. Qxb1 Qxe3) 37. Qd4 h4 {Hoping for ...h3+!} 38. Rxb2 h3+ (38... Qc1 $16 {was called for.} 39. gxh4 Qc6+ 40. f3 Re8) 39. Kxh3 $18 Qf1+ {[#]} 40. Kg4 $1 Re8 41. f4 (41. Qd5 $18 {has better winning chances.}) 41... Re6 {[#]} (41... Qe1 $16 42. Qd2 Qxd2 43. Rxd2 Rxe3) 42. f5 $1 {[%CAl Rf5e6]} Rh6 43. h4 (43. e4 $18) 43... Kh7 (43... Rc6 $16 44. Qd5 Rc8) 44. e4 g6 $2 (44... Ra6 {might work better.} 45. Qf2 (45. Rf2 Qe1 $16) 45... Qa1) 45. Rf2 ({Weaker is} 45. Rb8 gxf5+ 46. exf5 Qe2+ 47. Kh3 Qf1+ 48. Kh2 Qe2+ 49. Kg1 Rf6 $18) 45... gxf5+ 46. exf5 Qe1 47. Qf4 Rb6 {Strongly threatening ...Rb4.} 48. Kh3 Rb1 $2 (48... Rb3 49. Kh2 Ra3) 49. Qf3 Kg8 $2 (49... Qe5 50. Rc2 Rh1+ 51. Kg2 (51. Qxh1 Qxf5+ 52. Kh2 Qxc2+ 53. Qg2 Qd3 $16) 51... Re1) 50. Qg4+ (50. f6 $142 {White wants to mate with Qg4+.} Qe6+ 51. Qg4+ Qxg4+ 52. Kxg4) 50... Kf8 51. Qf3 (51. Qd4 $18) 51... Qe5 $2 {[%mdl 8192]} (51... Kg8 $11 52. f6 Qh1+ 53. Qxh1 Rxh1+ 54. Kg4 Rg1) 52. f6 Qe6+ 53. Kg2 (53. Kh2 $142 Rb6 54. Qa3+ Kg8 55. Qa8+ Kh7 56. Qf8 Qxf6 57. Rxf6 Rxf6 58. Qe7) 53... Rb8 54. Qf4 (54. Kh2 $142 Rb6 55. Qa3+ Kg8 56. Qa8+ Kh7 57. Qf8 Qxf6 58. Rxf6 Rxf6 59. g4) 54... Qd5+ 55. Kh2 (55. Kh3 $142 Qe6+ 56. Kh2) 55... Rb1 56. Qh6+ Ke8 57. Qe3+ Kf8 58. Rg2 {Threatens to win with Qe7+.} Rf1 59. Qh6+ Ke8 60. Qe3+ (60. Qh8+ $18 Kd7 61. Qg7) 60... Kf8 $1 $16 61. Qc3 {Threatening mate with Qc8+.} Kg8 62. Qd2 Qxd2 63. Rxd2 Rxf6 { KR-KR} 64. Kh3 Kg7 65. h5 Ra6 66. Kh4 (66. Rf2 $16) 66... Ra4+ $1 $11 {The position is equal.} 67. g4 f5 $1 68. Rg2 (68. Kg5 {feels hotter.} Rxg4+ 69. Kxf5 Ra4 70. Rd6 Ra5+ 71. Kg4) 68... Rxg4+ 69. Rxg4+ fxg4 70. Kxg4 {KP-K} Kh7 71. Kg5 (71. h6 {looks sharper.} Kg8 72. Kf3 Kh7 73. Kg4) 71... Kg7 72. h6+ Kh7 73. Kh5 Kh8 74. Kg6 Kg8 75. h7+ Kh8 76. Kh6 {Black escapes into a draw. Weighted Error Value: White=0.37/Black=0.44} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "3.9"] [White "Mammadzada, Gunay"] [Black "Gukesh D"] [Result "1/2-1/2"] [ECO "B81"] [WhiteElo "2443"] [BlackElo "2578"] [Annotator "TA"] [PlyCount "107"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 12,107,28,30,33,31,47,31,27,33,44,40,35,30,75,60,45,41,44,50,53,32,29, 40,45,19,15,7,20,0,0,0,0,0,0,0,0,-66,-61,-54,-55,-60,-52,-51,0,0,101,25,104, 100,98,102,206,197,197,196,175,120,92,129,149,149,149,149,149,140,235,31,39,7, 46,0,21,21,21,21,65,34,39,0,61,0,69,62,64,28,95,13,8,0,70,60,95,40,37,0,51,0]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. h3 e6 7. g4 Be7 { B81: Sicilian Scheveningen: Keres Attack.} 8. g5 Nfd7 9. Be3 b5 10. a3 Bb7 11. h4 $1 {11.h4 is better than 11.Qd2.} Nc6 12. f4 Qc7 {[#]} 13. f5 $146 ({ Predecessor:} 13. Qd2 Rc8 14. Rh3 Nc5 15. Bg2 Na5 16. Qf2 Nc4 17. Bc1 d5 18. exd5 exd5 19. b3 {0-1 (47) Oparin,G (2552)-Narayanan,S (2443) Pune 2014}) 13... Nxd4 14. Qxd4 Ne5 15. O-O-O {[%CAl Ba1d1,Bd1d2,Bd2f2][%mdl 32]} exf5 16. Nd5 Bxd5 17. Qxd5 Rc8 {[%csl Gc8][%CAl Rc7c2]} 18. Rd2 fxe4 19. Qxe4 O-O 20. Bf4 Rfe8 {Threatens to win with ...Ng6.} 21. Bxe5 dxe5 22. Bd3 g6 23. Rf2 Rcd8 24. Kb1 ({White should try} 24. Qf3 $11) 24... Rd4 $1 $15 {[%CAl Rd4e4]} 25. Qf3 Rf4 26. Qe2 Rxf2 27. Qxf2 Bc5 (27... e4 $15 28. Bxe4 Bxa3 $1) 28. Qf3 $11 b4 ( 28... Qe7 $11 29. Qc6 e4) 29. a4 (29. h5 $16 {hxg6 is the strong threat.} e4 30. Bxe4) 29... b3 (29... Qe7 $11 {remains equal.} 30. Bxa6 e4) 30. cxb3 $16 Bd4 31. Qe4 Rb8 {[#]} (31... Qd7 $16) 32. Bc4 $1 $18 Qb7 {[#]} 33. Bd5 { [%CAl Rd5b7]} Qb4 34. Qf3 (34. Rd1 $18) 34... Rf8 $16 ({Not} 34... Qd2 35. Qxf7+ Kh8 36. Qf6#) 35. Rf1 {[%CAl Rd5f7]} e4 ({And not} 35... Qd2 36. Bxf7+ Rxf7 37. Qxf7+ Kh8 38. Qf8#) 36. Qxe4 {Black must now prevent Rf4.} ({Stronger than} 36. Bxf7+ Kg7 $17) 36... Qd2 {[%csl Gd4][%CAl Rd2b2]} 37. Qc2 Qxc2+ 38. Kxc2 {[%mdl 4096] Endgame KRB-KRB} a5 (38... Bc5 $16 39. Rf6 a5) 39. Bc4 $2 ( 39. b4 $1 $18 {[%CAl Rb4a5]}) 39... Bc5 $1 $14 40. Kd3 Kg7 41. Ke4 Re8+ 42. Kd5 Bb4 43. Kc6 Re7 44. Kb6 Rd7 45. Rf3 Re7 (45... Rd6+ $11 46. Kb5 f5) 46. Rf1 ( 46. Kc6 $14) 46... Kf8 (46... Rd7 $11) 47. Kb5 Rc7 48. Rf3 Ke8 (48... Kg7 $11 { keeps the balance.}) 49. Re3+ (49. Kb6 $16 Re7 50. Rf4) 49... Re7 $11 50. Rf3 Re5+ (50... Rc7 $11) 51. Kb6 Re7 52. Bb5+ (52. Bd5 $16) 52... Kf8 $14 53. Bc4 Kg7 54. Rf1 {Black defended with fortune. Weighted Error Value: White=0.26/ Black=0.24} (54. Rf4 $14) 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "3.8"] [White "Shuvalova, Polina"] [Black "Badelka, Olga"] [Result "1-0"] [ECO "B57"] [WhiteElo "2489"] [BlackElo "2418"] [Annotator "TA"] [PlyCount "81"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 17,81,14,25,16,25,0,0,0,0,0,0,0,36,3,31,10,4,14,9,0,3,0,0,0,0,0,16,0,18, 0,0,0,-1,-20,0,0,65,61,61,42,42,42,68,80,102,100,147,147,208,167,281,296,310, 245,1510,1527,1491,1479,1441,1052,29987,29987,29995,29996,29996,264]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bc4 Qb6 7. Nb3 e6 8. Be3 Qc7 9. O-O a6 10. Bd3 {B57: Classical Sicilian: Sozin with 6...Qb6.} b5 11. Kh1 Be7 12. f4 {The position is equal.} Bb7 13. a3 Rd8 14. Qf3 {[#]} d5 $146 {[#] And now ...d4 would win.} ({Predecessor:} 14... g6 15. Qh3 h5 16. f5 Ng4 17. fxe6 fxe6 18. Bd4 Nce5 19. a4 b4 20. Ne2 Nxd3 21. cxd3 e5 {0-1 (38) Lepot,S (1880) -Marchal,J (2096) La Fere 2006}) 15. exd5 exd5 {...d4 is the strong threat.} 16. Nd4 O-O 17. Nce2 Ne4 18. Nxc6 Bxc6 19. Nd4 Bf6 20. Rad1 Rfe8 21. c3 Bb7 22. Bg1 Bc8 23. Rfe1 h5 {With the idea ...Bg4.} 24. f5 h4 25. Be3 Bb7 26. Bf4 Be5 ( {Black should play} 26... Qb6 $11) 27. Rf1 $14 Qe7 28. Bxe5 Qxe5 29. Qg4 Qf6 30. Rf4 Nc5 31. Bc2 (31. Qxh4 $2 Qxh4 32. Rxh4 Nxd3 $19) 31... Ne4 32. Kg1 ({ But not} 32. Qxh4 $2 Qxh4 33. Rxh4 Nf2+ 34. Kg1 Nxd1 $19) 32... a5 (32... Re5 $16 33. Qh5 (33. Qxh4 Qxh4 34. Rxh4 Rb8 $16) 33... Qg5 34. Qxg5 (34. Rxh4 { gets mated.} Qe3+ 35. Kh1 Nf2+ {[%mdl 64] Double Attack} 36. Kg1 Nxd1+ { [%mdl 64] Discovered Attack} 37. Kh1 Qe1#) (34. Qxh4 Qxh4 35. Rxh4 Rb8 $16) 34... Nxg5) 33. Qxh4 Qb6 (33... Qxh4 {is a better defense.} 34. Rxh4 Rb8 35. Nxb5 Bc6) 34. f6 $18 Nxf6 35. Rdf1 $40 {[%CAl Rf4f6][%mdl 128] Black must now prevent Rxf6. White is out for blood.} Bc8 $2 (35... Rd6 36. Kh1 Bc8) 36. Rxf6 gxf6 37. Qh6 {White wants to mate with Bh7+.} Re4 38. Rf3 {White threatens Rg3+ and mate.} Bg4 39. Rg3 {White mates.} Rde8 {[#]} 40. Rxg4+ $1 {[%mdl 512]} Rxg4 41. Bh7+ {Weighted Error Value: White=0.09/Black=0.46} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "3.7"] [White "Abdumalik, Zhansaya"] [Black "Salimova, Nurgyul"] [Result "1-0"] [ECO "B15"] [WhiteElo "2472"] [BlackElo "2395"] [Annotator "TA"] [PlyCount "131"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,131,22,26,9,43,39,31,32,38,12,18,21,27,20,33,24,54,57,71,77,66,52,57, 52,65,16,31,10,16,13,56,20,22,14,19,17,18,0,0,0,13,13,20,13,12,11,16,9,9,9,9,9, 12,6,10,10,10,12,11,8,11,12,11,7,13,14,9,7,7,0,23,10,110,7,12,12,75,75,105,60, 75,28,29,28,75,75,75,68,68,62,62,62,98,51,75,75,167,167,168,168,435,231,447, 438,426,141,141,141,141,141,141,148,29981,29982,29982,29983,29983,29984,29985, 29985,29986,29987,29988,29989]} 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nf6 5. Ng3 h5 6. h3 {[#] B15: Caro-Kann: 3 Nc3:3...g6 and 3...dxe4 4 Nxe4 Nf6 5 Nxf6+ exf6.} e5 $146 ({Predecessor:} 6... h4 7. N3e2 Bf5 8. Nf3 e6 9. Nf4 c5 10. Bb5+ Nc6 11. O-O Qb6 12. Bxc6+ bxc6 13. dxc5 Bxc5 {0-1 (37) Azarov,S (2802) -Sidorika,V (2580) Chess.com INT 2019}) 7. dxe5 Qa5+ {[%mdl 64] Double Attack} 8. c3 {White is slightly better.} Qxe5+ 9. Qe2 Qxe2+ 10. Bxe2 Be6 11. Nf3 Nbd7 12. Ng5 Bd5 13. O-O h4 14. Nf5 g6 15. Ne3 Bh6 16. Nxd5 Nxd5 17. Bg4 N7f6 18. Re1+ Kf8 19. Bf3 Re8 20. Bd2 Kg7 21. c4 Nb6 22. b3 Nbd7 23. g3 (23. Be2 { is more complex.} Nc5 24. Rad1 Rd8 25. f4 Nce4 26. Bc1) 23... hxg3 24. fxg3 Rxe1+ 25. Rxe1 Re8 26. Rxe8 (26. Kf1 {feels hotter.} Kg8 27. h4 a6 28. Rxe8+ Nxe8 29. Ke2) 26... Nxe8 27. Bc3+ Kf8 28. Ne4 f5 29. Nf2 Bg7 30. Bb4+ Kf7 31. Kg2 Nc7 32. Nd3 Ne6 33. h4 Bf6 34. Bd2 Nd4 35. Bd1 Ne6 36. a4 {[%CAl Ba2a4, Ba4a5,Ba5a6][%mdl 32]} (36. h5 {with more complications.} Bg5 37. hxg6+ Kxg6 38. Be1 a6 39. g4) 36... Ndc5 37. Nxc5 Nxc5 $11 {[%mdl 4096] Endgame KBB-KBN} 38. Be3 Be7 39. a5 b6 40. b4 Nd3 (40... Nd7 $11) 41. b5 ({But not} 41. axb6 $6 axb6 42. Bxb6 Bxb4 $11) ({Only move:} 41. Bxb6 $1 $16 Bxb4 42. Be2 (42. Bxa7 Bxa5 43. Ba4 c5 $11)) 41... cxb5 42. cxb5 Nc5 (42... Bc5 $11 43. Bb3+ Ke8) 43. a6 $16 Ke6 44. Bf3 Bd6 45. Bd4 Bc7 46. Kh3 Nb3 47. Be3 Nc5 48. g4 fxg4+ 49. Kxg4 Nd7 50. Kh3 Nf6 51. Bc6 Nh5 52. Kg4 {And now Kg5 would win.} Kf7 (52... Bd8 $16) 53. Bd5+ $18 Kg7 {Threatens to win with ...Nf6+.} 54. Bd4+ Kh6 $2 ( 54... Kf8 {was necessary.} 55. Kg5 Nf4) 55. Kf3 g5 $2 (55... Bd8 {might work better.} 56. Be5 Nf6) 56. Be3 Nf4 57. Be4 (57. Bf7 $1 $18 {and the rest is easy.}) 57... Kh5 $16 58. hxg5 Kxg5 59. Bh7 Bb8 60. Ke4 Kg4 $2 {[%mdl 8192] Loses the game.} (60... Bc7 $16 61. Bf5 Bb8) 61. Bxf4 {White mates.} Bxf4 {[#]} 62. Kd5 $1 {[%CAl Rd5c6]} Kg5 {[#]} 63. Kc6 $1 {[%CAl Rc6b7]} Kf6 64. Kb7 Ke7 65. Kxa7 Kd8 66. Kb7 {Weighted Error Value: White=0.13/Black=0.31} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "3.6"] [White "Lei, Tingjie"] [Black "Liang, Awonder"] [Result "0-1"] [ECO "B01"] [WhiteElo "2505"] [BlackElo "2592"] [Annotator "TA"] [PlyCount "74"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,74,46,60,40,30,37,38,33,77,44,62,27,42,27,47,17,85,58,72,22,22,29,93, 12,22,20,30,0,29,6,10,8,20,6,22,0,20,-13,-11,-15,104,95,68,62,44,-111,-123, -121,-114,-663,-653,-642,-616,-573,-415,-693,-684,-29980,29979,-438,-443,-892, -727,-1155,-1137,-962,-597]} 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd8 4. d4 Nf6 5. Nf3 g6 6. g3 {B01: Scandinavian Defence.} Bg7 7. Bg2 O-O 8. O-O {[#] White is slightly better.} Nbd7 $146 ({Predecessor:} 8... c6 9. Re1 Nbd7 10. Bg5 h6 11. Bf4 Nb6 12. Qc1 Kh7 13. a4 a5 14. Rd1 Bg4 {0-1 (35) Gadimbayli,A (2773) -Nakamura,H (3055) Chess.com INT 2019}) 9. Qe2 Nb6 10. Rd1 c6 11. Ne5 Be6 12. Bg5 (12. b3 {is more complex.} a5 13. a4 Re8 14. Bb2 Nbd7 15. h3) 12... Nbd5 ( 12... Nfd5 $11 {remains equal.}) 13. Nxd5 (13. Na4 {looks sharper.} Qc8 14. c4 Nc7 15. Nc5 Bf5 16. Re1) 13... Bxd5 14. c3 h6 15. Bf4 a5 (15... Bxg2 $11 16. Kxg2 Qd5+ 17. f3 Rad8) 16. Re1 (16. Bh3 $16) 16... Bxg2 $11 17. Kxg2 a4 18. a3 Qd5+ 19. Kg1 Rfe8 20. Rad1 Qe6 21. Qc2 {With the idea Nxg6.} Qh3 22. Nc4 h5 23. f3 Nd5 24. Bg5 h4 (24... b5 $11 {keeps the balance.} 25. Ne3 Bf6) 25. Bxh4 $16 Bh6 26. Ne5 Ne3 27. Rxe3 Bxe3+ $17 28. Kh1 {White wants to play Ng4.} g5 $36 { [%mdl 2048] Keeping White busy.} 29. Nxf7 $2 {[%mdl 8192]} Kxf7 $19 ({Not} 29... gxh4 30. Qg6+ Kf8 31. Ne5 Qxh2+ 32. Kxh2 Bg1+ 33. Kxg1 hxg3 34. Qf7#) 30. Qh7+ Ke6 31. d5+ cxd5 32. Qg6+ (32. Qd3 $142 d4 33. cxd4 gxh4 34. Qxe3+ Kd7 35. Qe4) 32... Kd7 33. Bxg5 {[#]} Bxg5 {[%mdl 8192]} (33... Rh8 $1 {and all is fine.} 34. Qc2 (34. Bh6 Rag8) 34... Qxg3 {[%mdl 64] Double Attack} 35. Rxd5+ Kc7 36. Rd7+ Kxd7 37. Bxe3 Qxf3+ 38. Qg2 {[#]} Rxh2+ $3 {[%mdl 576] Clearance} 39. Kxh2 Rh8+ 40. Bh6 Rxh6+ 41. Kg1 Qe3+ 42. Qf2 Rh1+ $3 {[%mdl 576] Deflection } 43. Kxh1 Qxf2 44. c4 b6 45. c5 bxc5 46. b4 axb3 47. a4 b2 48. a5 b1=Q#) 34. Qxg5 $4 {[%mdl 8192]} (34. Rxd5+ {was the only winning move.} Kc7 35. Rc5+ Kb8 36. Qxe8+ Ka7 37. Qxa4+ Kb8 38. Qe8+ Ka7 39. Qa4+ Kb8 40. Qe8+ Ka7 41. Ra5+ Kb6 42. Qb5+ {[%mdl 64] Double Attack} Kc7 43. Qe5+ Kd7 44. Qd5+ Kc7 45. Rc5+ Kb6 46. Rb5+ Kc7 47. Qxb7+ {[%mdl 64] Double Attack} Kd8 48. Qxa8+ Qc8 49. Rd5+ Ke8 50. Qxc8+ Kf7 51. Rxg5) 34... e6 {Black is clearly winning.} 35. c4 (35. Kg1 $142) 35... Rg8 36. Qf4 Raf8 37. Qe5 Qf5 {What a bad dream for White. Weighted Error Value: White=1.14/Black=0.54} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "3.5"] [White "Bjerre, Jonas Buhl"] [Black "Khademalsharieh, Sarasadat"] [Result "1-0"] [ECO "C77"] [WhiteElo "2542"] [BlackElo "2494"] [Annotator "TA"] [PlyCount "113"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 12,113,14,16,9,5,25,18,20,13,29,6,27,22,62,46,48,22,41,0,0,0,16,0,1,10, 68,30,116,139,168,87,85,98,97,84,280,283,262,179,283,291,243,-15,-13,-7,-14, -12,-18,-14,0,-24,-17,-73,-70,-72,-73,-130,-16,-14,-25,-39,-8,-13,-16,-8,0,0, 316,0,0,-8,0,0,7,0,0,0,0,-3,0,0,21,35,440,411,720,721,890,849,771,648,12841, 12841,12844,12845,12850,27999,27999,27999,27999,27999,27999,27999]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d3 b5 6. Bb3 Bc5 7. Bg5 h6 {C77: Ruy Lopez: 3.. .a6 4 Ba4 Nf6, unusual lines.} 8. Bh4 g5 {8...Be7 is setting a new trend.} 9. Bg3 d6 {The position is equal.} 10. c3 Bb6 11. a4 {[#]} Bd7 $146 ({Predecessor: } 11... b4 12. Nbd2 Rb8 13. O-O O-O 14. Ba2 Ba7 15. h3 Qd7 16. d4 exd4 17. cxd4 Nxd4 {1/2-1/2 (40) Evans,D (2352)-Schulz,G (2403) ICCF email 2017}) 12. Nbd2 Ne7 13. d4 exd4 14. cxd4 g4 {[#]} 15. e5 $1 gxf3 16. Qxf3 {aiming for Bh4.} Nf5 17. exf6 Nxd4 18. Qe4+ Kf8 19. O-O $40 {[%mdl 128] White attacks.} (19. a5 $5 { [%CAl Ra5b6]} Bc5 20. O-O $11) 19... Rb8 (19... Nxb3 $11 20. Nxb3 bxa4) 20. a5 $16 Bc5 21. Qh4 ({White should try} 21. Rae1 $18) 21... Nf5 22. Qh5 {[%csl Gb3] [%CAl Rh5f7]} Qxf6 23. Ne4 Qg7 (23... Qg6 $16 24. Qxg6 (24. Nxc5 $2 Qxh5 25. Nxd7+ Kg7 $19) 24... fxg6) 24. Nxc5 dxc5 25. Bxc7 Rc8 {[#]} (25... Rg8 { keeps fighting.} 26. g3 Rc8) 26. Be5 $1 $18 {[%CAl Re5g7][%mdl 576] Skewer} f6 27. Bc2 $2 {[#]} Qf7 $1 $11 28. Qxf7+ Kxf7 29. Bf4 Nd4 30. Bd1 h5 31. Rc1 c4 32. Rc3 (32. Be3 $11 {keeps the balance.} Nf5 33. Bb6) 32... Bg4 $17 33. f3 Bf5 34. Re3 (34. Rc1 $142) 34... Rhe8 ({Better is} 34... Ne6 $17 35. Bd6 Rhd8) 35. g4 $11 {Strongly threatening Rxe8.} Bc2 {Threatens to win with ...Bxd1.} 36. Kf2 ({Avoid the trap} 36. gxh5 $2 Bxd1 37. Rxd1 (37. Rxe8 $2 Rxe8 38. Rxd1 Ne2+ {[%mdl 64] Double Attack} 39. Kf1 Nxf4 $19) 37... Ne2+ 38. Rxe2 Rxe2 $19) 36... hxg4 (36... Red8 {with more complications.} 37. Rfe1 Rd7 38. Rc3 Bxd1 39. Rxd1 Rdd8) 37. fxg4 Bxd1 38. Rxd1 Ne6 (38... Red8 {keeps more tension.} 39. Rde1 Nc6 40. Kg3 Re8 41. Rf1 b4) 39. Rd7+ Kg6 $2 {[%mdl 8192] [#]} (39... Re7 $1 $11 { and Black stays safe.} 40. Rxe7+ Kxe7) 40. Bg3 $2 (40. Rxe6 $1 $18 {[%mdl 512]} Rxe6 41. h4) 40... Nc5 41. Ra7 Rxe3 (41... Ra8 {with more complications.} 42. Rxe8 Rxa7 43. Kf3 Rd7 44. Rc8 Nd3) 42. Kxe3 {[%mdl 4096] Endgame KRB-KRN} Re8+ 43. Kd4 Nb3+ 44. Kc3 Re6 45. Bc7 Re3+ 46. Kb4 Nd4 {( -> ...Ne6)} 47. Rxa6 { Black must now prevent Bd6.} Rb3+ $2 {[%mdl 8192]} ({Black should play} 47... Ne6 $14 48. Rxe6 Rxe6) 48. Kc5 $18 Ne2 (48... c3 $142 49. bxc3 (49. Kxd4 $2 cxb2 50. Be5 b1=Q $19) 49... Rxc3+ 50. Kxd4 Rxc7) 49. Be5 Kg5 50. Bxf6+ Kxg4 51. Rb6 c3 52. Bxc3 Nxc3 53. bxc3 Rxc3+ 54. Kxb5 Rb3+ {White mates.} 55. Kc6 Ra3 56. a6 Kh3 57. Kb7 {Weighted Error Value: White=0.37/Black=0.52} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "3.4"] [White "Praggnanandhaa R"] [Black "Murzin, Volodar"] [Result "1-0"] [ECO "E51"] [WhiteElo "2608"] [BlackElo "2502"] [Annotator "TA"] [PlyCount "135"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 20,135,38,29,36,20,58,16,21,16,30,6,8,0,0,0,0,0,0,0,6,-18,0,0,7,0,0,0,0, 0,70,65,88,91,114,105,121,91,88,100,100,100,106,82,84,92,68,95,88,87,73,27,29, 20,34,21,110,8,8,8,11,8,11,8,11,11,86,32,58,59,100,139,108,125,610,706,623,617, 611,602,592,586,567,361,361,361,361,360,345,300,233,134,134,141,1770,1270,6336, 9900,6336,1928,29971,29972,29971,29972,29972,29973,29973,29974,29975,29976, 29976,29977,29977,29978,29978,29979,29979,29980]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 c5 7. a3 Bxc3 8. Bxc3 Ne4 9. Rc1 Nxc3 10. Rxc3 cxd4 11. Nxd4 e5 {E51: Nimzo-Indian: Rubinstein: 4...0-0 5 Nf3 d5.} 12. Nb3 dxc4 { [#]} 13. Qxd8 $146 ({Of course not} 13. Rxc4 Qxd1+ 14. Kxd1 Rd8+ 15. Ke1 Be6 $11) (13. Bxc4 {is interesting.} Nd7 14. O-O Nf6 15. Qxd8 Rxd8 16. Nc5) ({ Predecessor:} 13. Bxc4 Qxd1+ 14. Kxd1 Nd7 15. Na5 Nf6 16. Ke2 b6 17. Nc6 Re8 18. Rhc1 Bb7 19. Bb5 {1-0 (38) Sengupta,D (2565)-Reuker,J (2377) Pardubice 2018 }) 13... Rxd8 {The position is equal.} 14. Bxc4 Nd7 15. Be2 Nf6 16. Bf3 Rb8 17. Na5 e4 18. Be2 Be6 19. Bc4 Nd5 20. Bxd5 Bxd5 21. Ke2 Kf8 22. Rd1 Ke7 23. Rd4 Ke6 24. Nb3 b6 ({Black should try} 24... f5 $11) 25. Nd2 $14 f5 26. Rc7 Kf6 27. Nb1 Be6 28. Nc3 Rxd4 29. exd4 $16 {[%mdl 4096] Endgame KRB-KRN} Rd8 30. Ke3 Rd7 31. Nb5 Rxc7 32. Nxc7 {KB-KN} Bd7 33. Nd5+ Ke6 34. Nf4+ Kf6 35. h4 (35. g4 $5) 35... g6 36. Nd5+ Ke6 37. Nc3 h6 (37... Kf6 $11 {keeps the balance.}) 38. Kf4 ( {White has to play} 38. g4 $1 $16) 38... Kf6 $11 39. g3 g5+ 40. hxg5+ hxg5+ 41. Ke3 Bc8 42. Nb5 a6 (42... a5 $1 $11) 43. Nc3 (43. Nd6 $16 Be6 44. Ne8+ Ke7 45. Ng7) 43... Bb7 44. Na4 b5 45. Nc5 Bc8 46. b4 Ke7 $2 {[%mdl 8192]} (46... Be6 $16 47. Nxa6 Bd7) 47. d5 $18 Kd6 48. Kd4 g4 {[#]} 49. a4 $1 bxa4 50. Nxa4 Bb7 51. Nc3 Ba8 52. b5 a5 53. b6 Bb7 54. Nb5+ Kd7 {[#]} 55. Na3 (55. Ke5 $1 $18) 55... a4 56. Ke5 f4 $2 {[%mdl 8192] A mistake that costs the game.} (56... Ba6 $16) 57. Kxe4 fxg3 58. fxg3 Kd6 59. Kd4 Bxd5 60. Nb5+ {White mates.} Kc6 {[#]} 61. b7 $1 {[%mdl 64] Deflection} Kxb7 62. Kxd5 {KN-KPP} Kb6 63. Na3 Ka5 64. Kc5 Ka6 65. Nc4 Kb7 66. Kb4 Kc7 67. Ne5 Kd6 68. Nxg4 {Weighted Error Value: White=0.18/Black=0.37} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "3.3"] [White "Mendonca, Leon Luke"] [Black "Abdusattorov, Nodirbek"] [Result "0-1"] [ECO "E92"] [WhiteElo "2549"] [BlackElo "2634"] [Annotator "TA"] [PlyCount "92"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 14,91,79,75,93,88,142,113,120,83,83,79,102,91,131,108,108,108,111,92,89, 86,102,91,75,74,83,62,287,286,293,66,177,129,138,129,135,130,189,44,22,55,58, 62,56,32,32,32,32,32,32,32,37,39,42,30,24,-220,-220,-216,179,191,233,18,19,0, 141,142,148,136,181,113,185,165,287,265,413,-917,825,-29999]} 1. d4 Nf6 2. c4 c5 3. d5 g6 4. Nc3 Bg7 5. e4 d6 6. Be2 O-O 7. Nf3 e5 8. h3 Nh5 {E92: King's Indian: Classical: 6 Be2 e5:7 dxe5, 7 Be3 and Petrosian System without 7... Nbd7.} 9. g3 {[#]} Kh8 $146 (9... Na6 $142) ({Predecessor:} 9... f5 10. exf5 gxf5 11. Ng5 Nf6 12. g4 e4 13. Be3 Qe7 14. Qd2 Na6 15. O-O-O Nc7 {1/2-1/2 (42) Wang,Y (2690)-Izoria,Z (2599) Chess.com INT 2018}) 10. Nd2 Nf6 {White is better.} 11. h4 h5 12. Nf3 Nbd7 13. Ng5 Nh7 14. Be3 Ndf6 15. f3 a6 16. a4 Kg8 17. Qd2 Bd7 18. Kf2 Nxg5 19. hxg5 Nh7 20. Kg2 f5 $2 (20... f6 $14) 21. exf5 $1 $18 Bxf5 22. Raf1 $2 (22. g4 $18 hxg4 23. fxg4) 22... Qe7 (22... e4 $1 $14) 23. g4 hxg4 24. fxg4 Bd7 25. Ne4 Bxa4 (25... Rxf1 $16 {might work better.} 26. Rxf1 Bxa4) 26. Bd3 (26. Ra1 $1 $18 {[%CAl Ra1a4]} Be8 27. Qe1) 26... Rxf1 $14 27. Rxf1 Rf8 28. Rh1 {[%mdl 1024] White has compensation.} Bd7 29. Kg3 Rf7 $1 ( 29... Qf7 $2 30. Qe2 $18) 30. Qh2 Nf8 31. b3 a5 32. Qd2 b6 33. Qh2 Bc8 34. Be2 Rf4 35. Bxf4 (35. Bf3 $11 {and White has nothing to worry.}) 35... exf4+ $19 { [%mdl 64] Discovered Attack} 36. Kf3 {[#]} Nd7 $4 {[%mdl 8192] [#]} (36... Bxg4+ $1 $19 {[%mdl 512] avoids the disaster.} 37. Kxg4 Qxe4) 37. Qh7+ $1 $18 Kf8 38. Bd1 $2 (38. Kxf4 $18 Qf7+ 39. Kg3) 38... a4 $1 $11 {[%CAl Ra4a3]} 39. bxa4 Ne5+ (39... Ba6 $1 $11 {keeps the balance.} 40. Be2 Qf7 41. Nxd6 Ne5+ 42. Kf2 Qe7) 40. Kxf4 $16 Nxc4 {( -> ...Qe5+)} 41. Qxg6 {aiming for Be2.} Qe5+ 42. Kf3 {Rf1 is the strong threat.} Qxd5 (42... Nd2+ $16 {is a better defense.} 43. Nxd2 Qc3+ 44. Kg2 (44. Ke2 Ba6+ 45. Kf2 Qxd2+ 46. Kg3 Be5+ 47. Kh4 Qxd5 $11) 44... Qxd2+ 45. Kh3 Qf4) 43. Kg3 $18 {Threatening mate with Rf1+.} Qd3+ (43... Be5+ {was called for.} 44. Kh4 Ne3 45. Qh6+ Ke7 46. Qh7+ Kd8) 44. Kh4 { Strongly threatening Rh2.} d5 {[#]} (44... Bd7 $142 45. Rh2 Qxd1 46. Rf2+ Ke7 47. Rf7+ (47. Qxg7+ Kd8 $18) 47... Kd8) 45. Bc2 $4 {[%mdl 8192]} Qe2 $4 { [%mdl 8192]} (45... Qf3 $19 46. Rg1 Qf4) 46. Ng3 $4 {[%mdl 8192]} (46. Nf6 $18) 46... Qxg4# {A wild game. Weighted Error Value: White=0.68/Black=0.49} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "3.2"] [White "Zhu, Jiner"] [Black "Yip, Carissa"] [Result "1-0"] [ECO "C95"] [WhiteElo "2462"] [BlackElo "2430"] [Annotator "TA"] [PlyCount "79"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 30,79,20,20,42,37,53,48,60,51,50,45,52,47,50,48,54,35,93,104,204,185, 211,203,196,195,250,253,231,53,47,34,58,34,286,270,748,731,658,591,416,370,716, 709,933,923,861,629,911,868,29987,29988]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Nb8 10. d4 Nbd7 11. Nbd2 Bb7 12. Bc2 Re8 13. Nf1 Bf8 14. Ng3 g6 15. a4 Bg7 16. Bd3 c6 {C95: Closed Ruy Lopez: Breyer Variation with 10 d4.} 17. Bg5 {17.Be3 is vanishing.} h6 { is now debated instead of 17...Nf8.} 18. Be3 Qc7 {White is slightly better.} 19. Qd2 Kh7 20. b4 Rad8 21. Qa2 {[#]} Re7 $146 ({Predecessor:} 21... d5 22. dxe5 Nxe4 23. Bxe4 dxe4 24. Nxe4 Nxe5 25. Nxe5 Bxe5 26. Bd4 Bxd4 27. cxd4 Qf4 { 1/2-1/2 (51) Neumeier,K (2344)-Knoll,H (2393) Jenbach 2009}) 22. Rad1 Rde8 23. dxe5 (23. axb5 {is interesting.} cxb5 24. d5 Qxc3 25. Qb1 Qc8 26. Nd2) 23... dxe5 (23... Nxe5 $14 24. Nxe5 Rxe5) 24. c4 $16 Rd8 (24... bxa4 $16 {was necessary.} 25. c5 (25. Qxa4 c5 $14) 25... a5) 25. axb5 axb5 26. cxb5 cxb5 27. Bxb5 Nxe4 (27... Rb8 $142 28. Rc1 Qd8) 28. Nxe4 $18 Bxe4 {[#]} 29. Bg5 $2 f6 $14 {Strongly threatening ...Bxf3.} 30. Rxe4 hxg5 31. h4 Qb7 $2 {[%mdl 8192] Loses the game.} ({Better is} 31... Nc5 $14 32. Ree1 (32. Rxd8 Nxe4 33. Qg8+ Kh6 $14) 32... Rxd1 33. Rxd1 Ne4 34. hxg5 Nc3) 32. Qe2 $18 gxh4 (32... g4) 33. Rxh4+ Kg8 34. Bc4+ Kf8 35. Ba2 Rc8 $2 (35... Ke8 36. Qc2 Nf8 37. Qa4+ Red7) 36. Qd3 e4 37. Qb3 {[%csl Ga2][%CAl Rb3g8] [#]} Ke8 38. Nd4 {Black must now prevent Ne6.} f5 39. Qg8+ Bf8 40. Qxg6+ {[%mdl 64] Double Attack. Weighted Error Value: White=0.42/Black=0.71} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "3.1"] [White "Nihal Sarin"] [Black "Keymer, Vincent"] [Result "1-0"] [ECO "B12"] [WhiteElo "2620"] [BlackElo "2591"] [Annotator "TA"] [PlyCount "91"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,91,-29,-20,-22,-10,-47,0,0,0,-13,0,-3,0,0,0,-26,-7,-15,-7,-76,-18,-9, -43,-47,-53,-89,15,21,16,11,11,11,22,9,180,186,185,70,248,236,855,855,808,825, 789,782,1031,1023,1002,964,964,947,859,602,594,582,5782,5737,12841,12841,12842, 12842,12843,12841,12840,1858,12839,12838,12837,12838,12841,12842,12840,12839, 12845,12845,12845,12846,12846,12845,12846,12847,12847,12847]} 1. e4 c6 2. d4 d5 3. e5 Bf5 4. g4 Be4 5. f3 Bg6 6. e6 {B12: Caro-Kann: Advance Variation.} fxe6 7. h4 (7. f4 {with more complications.} Nf6 8. Nc3 Qd6 9. h4 h5 10. g5) 7... h5 (7... c5 {keeps more tension.} 8. Bb5+ Nc6 9. dxc5 e5 10. Qe2 Nf6) 8. Bd3 { The position is equal.} Bxd3 9. Qxd3 Qd6 $1 10. Ne2 {[#]} Nd7 $146 ({ Predecessor:} 10... e5 11. dxe5 Qxe5 12. Nbc3 Nd7 13. Qg6+ Kd8 14. Bg5 Ngf6 15. O-O-O Qd6 16. Nf4 hxg4 17. fxg4 {1-0 (40) Lamorelle,Y (2100)-Tan,Y (1541) Pattaya 2019}) 11. Bf4 e5 12. dxe5 Nxe5 {[%mdl 64] Double Attack} 13. Qc3 d4 $1 {[%CAl Rd4c3]} 14. Nxd4 {[#]} (14. Qb3 $1 $11 {remains equal.}) 14... Nxf3+ $1 15. Qxf3 $11 Qxd4 16. Nc3 e5 17. Bg5 {Rf1 is the strong threat.} hxg4 ({ Better is} 17... Qxg4 $17 18. Rf1 Qxf3 19. Rxf3 Be7) 18. Qf5 Ne7 19. Qe6 Qd7 { [%CAl Rd7e6]} 20. Qxe5 $40 {[%mdl 128] And now Rf1 would win. White mounts an attack.} Qf5 21. Qe3 {aiming for Rf1.} O-O-O $2 22. Rf1 $18 Qxc2 {[#]} 23. Rf2 (23. Rd1 $1 $18 {[%CAl Rd1d8] Rxd8+ would kill now.} Rxd1+ 24. Nxd1) 23... Qg6 $2 (23... Qd3 $14) 24. Qxa7 ({Avoid the trap} 24. Bxe7 $2 Bxe7 25. Kf1 Bxh4 $19 ) 24... g3 $2 ({Not} 24... Qd6 $2 25. Bf4 $18) (24... Qe6+ 25. Kf1 Qc4+ 26. Kg2 Qa6 27. Qxa6 bxa6) 25. Qa8+ {White is clearly winning.} Kc7 {[#]} 26. Nb5+ $1 { [%mdl 512]} cxb5 27. Rc1+ Kd7 28. Rd2+ Ke6 29. Qxd8 {Hoping for Rd6+.} Kf7 30. Re2 g2 31. Rxg2 {Threatens to win with Re2.} Qe4+ 32. Re2 Qb4+ 33. Kf1 Rxh4 34. Rf2+ Kg6 35. Bxh4 Qxh4 36. Qd3+ Kh6 37. Qe3+ (37. Qd2+ $142 Qg5 38. Rh2+ Kg6 39. Rg2 Qxg2+ 40. Qxg2+ Kf6 41. Qxb7) 37... g5 38. Kg2 Qg4+ 39. Kh1 Ng6 40. Rg1 Qh5+ 41. Rh2 Nh4 {[#]} 42. Rxg5 $3 {[%mdl 576] Remove Defender} Qxg5 43. Rxh4+ $1 Kg6 44. Qe4+ Kf6 45. Rf4+ Kg7 46. Rg4 {Weighted Error Value: White=0.23/ Black=0.49} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "2.10"] [White "Yip, Carissa"] [Black "Nihal Sarin"] [Result "1/2-1/2"] [ECO "D77"] [WhiteElo "2430"] [BlackElo "2620"] [Annotator "TA"] [PlyCount "86"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 14,86,23,14,20,0,-4,-25,-4,-26,-26,-26,-25,-26,-24,-16,-16,-16,-12,-14, -13,-54,-8,-64,-60,-62,-62,-64,-64,-64,-62,-55,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 d5 2. g3 g6 3. Bg2 Bg7 4. d4 Nf6 5. O-O O-O 6. c4 dxc4 7. Na3 {[%CAl Bb1a3,Ba3c4,Bc4e5][%mdl 32]} c5 8. Nxc4 Be6 {8...Be6 is better than 8...cxd4. D77: Fianchetto Grünfeld: 6 0-0: Replies other than 6...c6.} 9. Nce5 cxd4 10. Nxd4 Bd5 { Black has an edge.} 11. Ndf3 Nc6 12. Nxc6 Bxc6 {[#]} 13. Be3 $146 ({ Predecessor:} 13. Qb3 Ne4 14. Rd1 Qa5 15. Be3 Nd6 16. a4 Rfc8 17. Ng5 Bxg2 18. Rxd6 Qf5 19. Rd7 {0-1 (53) Taalaibekov,T (2181)-Savenkov,K (2325) Moscow 2016}) 13... Ng4 14. Bd4 Bxf3 15. exf3 {[#] aiming for Bxg7.} Bxd4 16. fxg4 Qb6 17. Qf3 Rac8 18. Qxb7 (18. Rae1 $11) 18... Qxb7 $15 19. Bxb7 Rb8 20. Bd5 Rxb2 21. Rad1 Bb6 22. Bb3 Rd8 (22... e6 $15) 23. Rxd8+ $11 {The position is equal.} Bxd8 {[%mdl 4096] Endgame KRB-KRB} 24. f4 Bb6+ 25. Kh1 Kg7 26. g5 f6 27. gxf6+ exf6 28. Rd1 h5 29. Rd7+ Kh6 30. h4 Rb1+ 31. Kg2 Rc1 32. Bg8 {[%csl Gg8][%CAl Rd7h7] [#]} (32. Kf3 {looks sharper.} Rc3+ 33. Kg2 f5 34. Rd6 Rc7 35. Kf3) 32... Rc7 33. Rxc7 Bxc7 {KB-KB} 34. Be6 g5 35. hxg5+ fxg5 36. fxg5+ Kxg5 37. Kf3 h4 38. gxh4+ Kxh4 39. Ke4 Kg5 40. Kd5 Kf6 41. Bd7 Bb6 42. Kc6 Ke7 43. Bg4 Kf6 { Weighted Error Value: White=0.07/Black=0.03} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "2.9"] [White "Abdusattorov, Nodirbek"] [Black "Zhu, Jiner"] [Result "1/2-1/2"] [ECO "B52"] [WhiteElo "2634"] [BlackElo "2462"] [Annotator "TA"] [PlyCount "159"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,159,0,15,24,18,16,25,3,42,12,14,22,12,-6,24,0,17,0,0,0,0,-61,21,13,27, 10,42,4,4,0,41,38,227,234,214,16,31,34,87,80,88,90,155,152,151,172,153,33,12, -6,-2,-2,-2,-2,-1,-22,-24,-54,-52,-68,-68,-68,-54,-68,-49,-53,-53,-53,-53,-59, -54,-68,-59,-68,0,-68,-59,-68,0,-77,-68,-91,-62,-83,-83,-83,-68,-77,-68,-70,0, -77,0,-68,-67,-68,-68,-68,-67,-77,-68,-83,-47,-47,-47,-47,-36,-36,-9,-9,-9,-9, -9,-9,-9,-9,-9,-9,-9,-9,-2,-2,0,-9,0,-2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. c4 Nf6 5. Nc3 g6 6. d4 { B52: Sicilian: Moscow Variation with 3...Bd7.} cxd4 7. Nxd4 Bg7 8. O-O { White has an edge.} O-O (8... Nc6 {seems wilder.} 9. Nb3 O-O 10. Qe2 Be6 11. h3 Rc8) 9. h3 a6 10. Bxd7 Nbxd7 11. b3 {[#]} Qa5 $146 ({Predecessor:} 11... Rc8 12. Bb2 Nc5 13. Re1 Nh5 14. g3 Nf6 15. Kg2 Nfd7 16. Qd2 Ne5 17. Re3 Nc6 18. Nxc6 bxc6 {1-0 (26) Ding,L (2799)-Garifullina,L (2406) chess24.com INT 2021}) 12. Bb2 Rfc8 13. Rc1 {[%CAl Ba1c1,Bc1c3,Bc3e3][%mdl 32]} b5 14. Nd5 Nxd5 15. exd5 (15. cxd5 $11 Qxa2 16. Nc6 $1) 15... Qxa2 ({Black should try} 15... bxc4 $1 $15 16. Nc6 Rxc6 $1 17. dxc6 Bxb2) 16. Bc3 $11 {aiming for Ra1.} Qa3 (16... bxc4 $2 17. Ra1 $18) 17. Nc6 Bxc3 18. Rxc3 Re8 19. Re3 bxc4 (19... Ne5 $5) 20. Nxe7+ Kf8 $2 {[#]} (20... Kg7 $14) 21. Qd4 $1 $18 {[%CAl Rd4h8]} f6 22. Rfe1 $2 (22. bxc4 $18 Qb4 23. Nc6) 22... Ne5 $1 $11 {[#]} 23. Qh4 $1 Kg7 ({Wrong is} 23... Rxe7 $2 24. Qxf6+ Ke8 25. Qh8+ Kf7 26. Qxa8 $18) (23... Kxe7 $14 24. f4 { [%mdl 64] Pin} h5) (23... Kxe7 24. f4) 24. bxc4 $16 Qc5 25. Nc6 {Rb1 is the strong threat.} Rf8 {[#]} (25... g5 $142 26. Qh5 Qxc4) 26. Nd4 $1 {[%CAl Rd4e6] } ({Stronger than} 26. Nxe5 fxe5 27. Rb1 Ra7 $15) 26... Kg8 27. Ne6 {[%mdl 64] Double Attack} Qxc4 28. f4 (28. Re4 $16 Qxd5 29. Nxf8 Rxf8 30. Rd4) 28... Rf7 $14 29. Qg3 $132 {[%mdl 2048] White is fighting back} Qxd5 30. fxe5 Qxe6 31. exd6 Qd5 32. Kh1 Rd8 33. Re6 Kg7 34. Qa3 a5 {[%CAl Ba6a5,Ba5a4][%mdl 32]} 35. Qg3 a4 36. Qa3 Qb3 37. Qc5 a3 38. R6e3 Qb8 39. Qxa3 Qxd6 40. Qc3 Qd4 41. Qc6 Qd6 (41... h5 $15) 42. Qf3 (42. Qc3 $1 $11) 42... Qd5 43. Qg3 Qd6 ({Better is} 43... Qc5 $15) 44. Qh4 (44. Qf3 $1 $11) 44... Rdd7 45. Rf1 Qd4 46. Re4 Qd3 47. Rfe1 Qc2 48. R4e2 Qb3 49. Re3 Qc2 50. R3e2 $1 {[%CAl Re2c2]} Qb3 (50... Qc5 $17 ) 51. Kh2 (51. Re3 $1 $11 Qb7 52. Qf4) 51... Rd1 52. Qf4 Rxe1 53. Rxe1 $15 { [%mdl 4096] Endgame KQR-KQR} Qd5 54. Re8 Rd7 (54... g5 {seems wilder.} 55. Qb4 h5 56. h4 g4 57. Re7 Qf5) 55. Qb8 Qd6+ (55... g5 {is interesting.} 56. Rh8 Qf7 57. Rc8 Qe6 58. Re8 Re7) 56. Qxd6 Rxd6 {KR-KR} 57. Re7+ Kh6 58. h4 g5 59. hxg5+ {The position is equal.} fxg5 60. g4 Kg6 61. Kg3 Rd3+ 62. Kg2 Rd4 63. Kf3 Rf4+ 64. Kg3 h6 65. Re6+ Rf6 (65... Kh7 {is more complex.} 66. Ra6 Rf7 67. Re6 Ra7 68. Rb6 Ra3+) 66. Re8 Rf4 67. Re6+ Rf6 (67... Kg7 {feels hotter.} 68. Ra6 Rb4 69. Ra7+ Kf6 70. Ra6+ Ke5) 68. Rxf6+ Kxf6 $11 {KPP-KP} 69. Kf3 Kf7 (69... Ke5 { looks sharper.} 70. Ke3 Kd5 71. Kd3 Ke5 72. Ke3) 70. Ke4 Ke6 71. Kd4 Kf6 { And now ...Kg6 would win.} (71... Kd6 $5) 72. Ke4 Kg6 73. Kf3 $1 Kf7 74. Ke4 Kf6 (74... Kg8 {keeps more tension.} 75. Kf3 Kf8 76. Ke4 Kg8) 75. Kf3 $1 Ke5 76. Ke3 Kd5 77. Kd3 Ke5 78. Ke3 Ke6 {( -> ...Ke5)} 79. Ke4 Kf6 80. Kf3 $1 { Weighted Error Value: White=0.22/Black=0.23} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "2.8"] [White "Murzin, Volodar"] [Black "Mendonca, Leon Luke"] [Result "0-1"] [ECO "B23"] [WhiteElo "2502"] [BlackElo "2549"] [Annotator "TA"] [PlyCount "52"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,52,0,16,-9,-4,-4,-6,-17,31,0,-13,-28,55,-259,-241,-249,-256,-269,-263, -243,-147,-302,-296,-381,-365,-361,-370,-408,-418,-727,-656,-829,-647,-644, -642,-601,-622,-935,-932,-893,-854,-2463,-2329,-29989,-29976]} 1. e4 c5 2. Nc3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Qd2 g6 6. b3 {B23: Closed Sicilian: Lines without g3.} Bh6 7. f4 Nf6 8. Bb2 {The position is equal.} e5 9. Nge2 O-O 10. O-O-O Nd4 {[#]} (10... Ng4 $11 11. Rg1 (11. Qxd6 Nf2 $15) 11... Be6) 11. Nxd4 $146 { [%mdl 8192]} (11. Qe1 $14 {keeps the upper hand.}) ({Predecessor:} 11. Kb1 Bg4 12. g3 d5 13. Nxd5 Nxd5 14. exd5 Qxd5 15. Bxd4 exd4 16. Rg1 Rfe8 17. h3 { 0-1 (26) Gevorgyan,M (2228)-Shevchenko,K (2592) Chess.com INT 2020}) 11... Bxf4 $19 12. Qxf4 exf4 13. Ndb5 Be6 14. Nxd6 Qa5 {Strongly threatening ...Ng4.} 15. e5 $2 {This costs White the game.} (15. Be2 $17) 15... Ng4 ({Inferior is} 15... Qxe5 16. Nce4 $11) 16. Rd2 {[#]} Rac8 $1 17. Nce4 Ne3 {aiming for ...Rxc2+!} ({ Resist} 17... Qxa2 18. Nxc8 Rxc8 19. Nd6 $19) ({Worse is} 17... Nxe5 18. b4 $11 ) 18. Kb1 {[#]} Nxc2 $1 19. a4 (19. Bb5 $142 Bf5 20. Bc4 Bxe4 21. Nxe4 Na3+ 22. Bxa3 Qxa3 23. Rhd1) (19. Be2 Na3+) 19... Ne3 20. Bc4 Nxc4 21. bxc4 Qxa4 22. Rc1 Rc6 23. Rd5 Bxd5 24. Nf6+ Kh8 25. e6 Bxe6 26. Nde4 Rb6 {Weighted Error Value: White=1.39/Black=0.23} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "2.7"] [White "Khademalsharieh, Sarasadat"] [Black "Praggnanandhaa R"] [Result "0-1"] [ECO "E68"] [WhiteElo "2494"] [BlackElo "2608"] [Annotator "TA"] [PlyCount "74"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 15,74,34,46,38,40,51,40,43,48,37,66,49,57,49,45,23,37,0,49,38,58,19,105, 68,118,41,69,66,96,104,128,71,66,36,31,7,26,20,114,90,91,90,82,72,92,62,80,85, 81,20,25,-639,-627,-1755,-1755,-1568,-1327,-1839,-1840,-5502,-2213]} 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nbd7 7. Nc3 e5 8. e4 b6 9. Re1 { E68: King's Indian: Fianchetto: 6...Nbd7 7 0-0 e5 8 e4.} exd4 10. Nxd4 Bb7 {[#] } 11. Be3 $146 {White is slightly better.} ({Predecessor:} 11. Bg5 Qc8 12. Qd2 Re8 13. Rad1 Nc5 14. f3 Ne6 15. Be3 Rd8 16. h3 Qd7 17. Kh2 {1/2-1/2 (73) Molina,F (2211)-Temporin,A (1942) Verona 2010}) 11... c6 12. h3 Qc7 13. Rc1 Rad8 14. Qc2 Rfe8 15. Rcd1 a6 16. f4 Re7 (16... b5 $5) 17. g4 h6 18. Nde2 Qb8 ( 18... b5 $11) 19. Ng3 b5 {[#]} 20. cxb5 (20. Qd2 $1 $16) 20... cxb5 21. a3 Ree8 22. Qf2 Ba8 23. Bf3 (23. Bd4 $142) 23... a5 $16 24. Ba7 Qb7 25. Rxd6 {White wants to play Bh1.} Bf8 26. Rdd1 Qc7 (26... Qxa7 $11 27. Qxa7 Bc5+ 28. Qxc5 Nxc5) 27. Be3 {Threatens to win with e5.} ({But not} 27. Nxb5 $6 Qxf4 28. Bd4 Ne5 $14) 27... b4 28. axb4 axb4 29. Nb5 Qb8 30. Nd4 Nc5 {[%CAl Rf6e4]} 31. e5 Nd5 32. Nc6 Bxc6 $11 33. Bxc5 {[%mdl 8192] This move loses the game for White.} (33. Bxd5 $11 Bxd5 34. Bxc5) 33... Nxf4 $19 {Black is clearly winning.} 34. Kh2 Bxc5 {[%mdl 64] [#] Overworked Piece} 35. Qxc5 Bxf3 36. Rxd8 Rxd8 37. Rf1 Rd2+ {[%mdl 64] Double Attack. Weighted Error Value: White=0.67/Black=0.20} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "2.6"] [White "Liang, Awonder"] [Black "Bjerre, Jonas Buhl"] [Result "1-0"] [ECO "B23"] [WhiteElo "2592"] [BlackElo "2542"] [Annotator "TA"] [PlyCount "123"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 13,123,13,27,31,51,28,35,27,31,16,97,95,112,93,84,81,164,182,129,120, 130,72,85,0,0,0,0,-10,0,0,0,0,0,0,0,0,96,88,89,100,102,59,72,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,27,32,60,60,60,60,60,60,61,0,65,0,69,0,0,0,8,8,286, 45,56,0,0,0,8,8,357,339,12831,12832,6514,9389,12835,2503,12840,12840,12841, 12841,12841,12841,12841,12842,12842,12842,12842,12840]} 1. e4 c5 2. Nc3 d6 3. Bb5+ Nc6 4. f4 Nf6 5. Bxc6+ bxc6 6. Nf3 g6 7. O-O Bg7 8. d3 {B23: Closed Sicilian: Lines without g3.} Ba6 9. Kh1 O-O 10. Qe1 {White is slightly better.} c4 11. d4 {[#]} Qa5 $146 (11... Rb8 $11) ({Predecessor:} 11... Nd7 12. e5 c5 13. d5 Nb6 14. e6 f6 15. Be3 Bb7 16. Rd1 f5 17. Qh4 Bxc3 18. bxc3 Nxd5 19. Bxc5 dxc5 {0-1 (36) Setiabudi,A (1943)-Kiripitige,P Adelaide 2013}) 12. f5 $1 $16 gxf5 13. e5 dxe5 14. dxe5 Ng4 {[#]} (14... Nd5 $16 {keeps fighting.}) 15. Bf4 $1 $18 f6 16. exf6 exf6 17. Qe6+ (17. Qg3 $142) 17... Kh8 $16 18. Nd4 (18. Rae1 $16) 18... Qb6 $1 $11 {[%CAl Rb6d4]} 19. Qxf5 (19. Nxf5 $2 Bc8 $19) 19... Bc8 20. Qe4 f5 21. Qxc6 Qxd4 22. Qxa8 Nf2+ 23. Rxf2 $1 Qxf2 24. Qb8 Qxc2 (24... Ba6 $11 {remains equal.} 25. Qd6 (25. Qc7 Rc8 $11) 25... Bb7) 25. Be5 $16 Re8 26. Bxg7+ Kxg7 27. Qc7+ {[%mdl 64] Double Attack} Kh8 28. Qc6 ({Much weaker is} 28. Qxc4 Qd2 $11) ({Don't play} 28. Qf7 Rg8 $11) (28. Qxa7 $16 {And now Qd4+ would win.} Qxb2 29. Qd4+ {[%mdl 64] Double Attack} Kg8 30. Rg1) 28... Rg8 $1 $11 29. Re1 {White wants to mate with Qf6+.} Be6 30. Qb7 Qf2 {[%CAl Rf2e1]} 31. Rg1 f4 32. Qe7 Qe3 33. Qf6+ Rg7 34. Qf8+ Rg8 35. Qf6+ Rg7 36. Nb5 (36. h4 {is interesting.} Bg8 37. a3 Be6 38. h5 Bh3 39. Qd8+) 36... f3 37. Qxf3 Qxf3 38. gxf3 {[%mdl 4096] Endgame KRB-KRN} Rb7 39. Nd4 Bf7 (39... Bh3 {feels hotter.} 40. b3 Rd7 41. Ne2 cxb3 42. axb3 Rd3) 40. Rg2 c3 41. bxc3 Rb1+ 42. Rg1 Rxg1+ 43. Kxg1 {Strongly threatening a4.} Bxa2 $14 {KB-KN} 44. Kf2 (44. Nc6 $1 $14) 44... Kg7 ({Black should play} 44... a5 $11) 45. Ke3 (45. Nc6 $1 $14) 45... Kf6 (45... a5 $11) 46. Kd3 ({White should try} 46. Nc6 $1 $14) 46... Ke5 $11 47. c4 Kd6 48. Kc3 {Black must now prevent Kb4.} a5 {[%mdl 8192] [#]} (48... Ke5 $1 $11) 49. f4 $2 (49. Nb3 $1 $18 {aiming for Kb2.} a4 50. Nd2) 49... Bb1 50. Nb3 ({Better is} 50. Nc2 $1 $14 Ba2 51. Na3) 50... a4 51. Nd2 Bf5 52. Kb4 Bd7 $2 { [%mdl 8192]} (52... Bg6 $11 {and Black stays safe.}) 53. Ne4+ $18 Kc6 $2 (53... Ke7 54. Nc5 Bg4 55. Nxa4 Kf6) 54. Kxa4 {White is clearly winning.} Bf5 55. Ng3 Bg6 56. Kb4 (56. Kb3 $142 Kd6 57. Kc3) 56... h5 57. f5 Bf7 58. Ne4 Kd7 59. Kc5 Ke7 60. Kd4 Be8 61. c5 Bd7 62. Ke5 {Weighted Error Value: White=0.21/Black=0.36 } 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "2.5"] [White "Salimova, Nurgyul"] [Black "Lei, Tingjie"] [Result "1/2-1/2"] [ECO "E06"] [WhiteElo "2395"] [BlackElo "2505"] [Annotator "TA"] [PlyCount "146"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 12,146,-3,4,6,0,14,0,20,7,10,20,54,0,7,11,0,12,14,4,17,0,39,-1,48,41,48, 46,64,63,62,54,68,66,71,77,121,88,94,89,99,103,103,88,91,77,88,78,89,87,98,91, 100,98,116,102,105,108,108,105,108,108,127,108,108,108,184,145,144,122,142,142, 158,108,127,127,131,131,121,82,82,82,82,82,82,82,85,82,94,94,94,94,94,94,94,94, 94,94,94,94,94,82,94,94,94,79,79,79,79,79,79,79,79,79,79,79,79,68,68,68,68,68, 68,68,68,0,68,14,14,14,14,0,14,0,14,0,14]} 1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. g3 Be7 5. Bg2 O-O 6. Nc3 dxc4 7. Ne5 Qd6 {E06: Closed Catalan: Early deviations.} 8. Nxc4 Qa6 {[%CAl Ra6c4]} 9. b3 Nc6 10. O-O Rd8 11. e3 {[#]} e5 $146 {[%CAl Re5d4]} ({Predecessor:} 11... Rb8 12. a4 Na5 13. Ne5 c5 14. Nb5 Qb6 15. Ba3 a6 16. dxc5 Rxd1 17. cxb6 Rxf1+ 18. Kxf1 Bxa3 19. Nxa3 Nxb3 {1-0 (62) Salimova,N (2384)-Pandey,S (2026) Chess.com INT 2020}) 12. d5 (12. Bxc6 $14 bxc6 13. Nxe5) 12... b5 13. Nd2 b4 14. Na4 Nxd5 15. Qc2 Be6 16. Bb2 Rac8 17. Rac1 Nc3 18. Nxc3 bxc3 19. Bxc3 ({Much worse is} 19. Qxc3 Nb4 $11) 19... Nb4 20. Bxb4 Bxb4 21. Nc4 Bxc4 22. Qxc4 Qxc4 23. Rxc4 Ba5 24. Rc5 Bb6 25. Rxe5 Rd2 26. a4 {[#] Black must now prevent a5.} a5 27. Bd5 Kf8 28. Bc4 Rcd8 29. Rf5 f6 30. g4 Ke7 31. Kg2 h6 32. h4 R8d6 33. Kg3 Rd1 34. Rxd1 Rxd1 $16 {[%mdl 4096] Endgame KRB-KRB} 35. Rb5 Ra1 36. Kf3 Ra2 37. g5 hxg5 38. hxg5 fxg5 (38... Ra1 $16 39. gxf6+ gxf6) 39. Rxg5 Kf6 40. Rb5 Rb2 41. Rd5 Rb1 42. Rd8 g5 43. Rf8+ Kg7 44. Rf7+ Kg6 45. Rxc7 g4+ 46. Kg2 Bxc7 47. Bd3+ {[%mdl 64] [#] Double Attack} Kg5 48. Bxb1 { KB-KB} Bd6 49. Bd3 Bb4 50. Kf1 Kf6 51. Ke2 Kg5 52. Be4 Bc3 53. Bb7 Bb4 54. Bc8 Bc3 55. Kf1 Bb4 56. Kg2 Bc3 57. Bd7 Bb4 58. Kg3 Bd6+ 59. f4+ gxf3+ 60. Kxf3 Kf6 61. Ke4 Ke7 62. Bg4 Bc5 63. Kd3 Kd6 64. e4 Ke5 65. Kc4 Bb4 66. Bf5 Be1 67. Kb5 Bb4 68. Kc4 Be1 $1 69. b4 ({Better is} 69. Kd3 $14) 69... Bxb4 $11 {The position is equal.} 70. Kb5 Be1 71. Kc4 Bb4 72. Kb5 Be1 73. Kc4 Bb4 {White really could win this. Weighted Error Value: White=0.09/Black=0.10} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "2.4"] [White "Badelka, Olga"] [Black "Abdumalik, Zhansaya"] [Result "1-0"] [ECO "A31"] [WhiteElo "2418"] [BlackElo "2472"] [Annotator "TA"] [PlyCount "101"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 23,101,29,45,16,9,0,67,70,91,23,89,8,12,-17,32,28,28,33,26,30,133,87,93, 92,89,93,95,102,108,64,93,106,126,0,0,0,52,16,70,16,21,0,0,0,34,41,196,190,300, 295,299,297,292,90,92,0,260,0,102,14,10,0,554,564,29948,5816,29989,29989,29994, 29987,29989,6099,29994,29995,29995,29994,29996,29995,29995,29996]} 1. Nf3 Nf6 2. c4 c5 3. Nc3 b6 4. e4 d6 5. d4 cxd4 6. Nxd4 Bb7 7. f3 e6 8. Be3 Be7 9. Be2 O-O 10. O-O a6 11. Qd2 Nbd7 12. a4 $1 {[%mdl 4] is more profitable than 12. Rfd1 at the moment.} Qc7 13. a5 {A31: Symmetrical English: 2 Nf3 Nf6 3 d4.} bxa5 14. Nb3 Rab8 (14... d5 $1 $11) 15. Nxa5 $14 {White is slightly better.} Ba8 16. Rfb1 (16. Rfc1 $16) 16... Rfd8 {[#]} (16... d5 $11 {keeps the balance.} 17. cxd5 (17. exd5 Bb4 $14) 17... exd5) 17. b4 $146 (17. Rc1 $16) ({ Predecessor:} 17. Rc1 Nc5 18. b4 Ncd7 19. Nd5 exd5 20. cxd5 Nc5 21. bxc5 dxc5 22. Nc4 Bxd5 23. exd5 Nxd5 {1-0 (35) Likavsky,T (2482)-Motuz,K (2366) Slovakia 2003}) 17... d5 $11 18. exd5 Bxb4 {[#]} (18... Bd6 {is interesting.} 19. Kh1 exd5 20. b5 Bxh2 21. b6 Rxb6 22. Rxb6 d4) 19. Rxb4 Rxb4 {[#]} 20. Nb5 $1 $36 { [%mdl 2112] Discovered Attack. White is more active.} Rxb5 21. cxb5 Nxd5 (21... axb5 $11 {remains equal.} 22. Rc1 (22. Bxb5 Bxd5 23. Rc1 Qb8 $15) 22... Qd6) 22. bxa6 Nxe3 23. Qxe3 Nf6 24. Nc4 Nd5 25. Qf2 h5 26. Ne3 Nf4 27. Bf1 Nd3 28. Bxd3 (28. Qd2 $16 Nf4 29. Qa5 Qxa5 30. Rxa5) 28... Rxd3 29. Nf1 Rc3 (29... Kh7 $11) 30. a7 Rc2 (30... Kh7 $11) 31. Qd4 (31. Qe3 $14) 31... e5 32. Qb4 Kh7 33. Ng3 g6 (33... f5 $5) 34. h3 Qc6 {[#]} ({Black should play} 34... Qd8 $14) 35. Ne4 $1 $18 {Qf8 is the strong threat.} Kg7 (35... Qc4 $142 36. Qxc4 Rxc4 37. Nf6+ Kg7) 36. Qb8 Qd5 {Strongly threatening ...Qd4+.} 37. Kh2 h4 {If Black can now play ...f5 this consolidates a bit.} 38. Qb6 $2 (38. Qe8 $18 Qd4 39. Re1) 38... Rc6 $16 39. Qb8 (39. Qg1 $16) 39... Rc2 $18 40. Qb6 $2 (40. Rb1 $18 { and White stays clearly on top.} f6 41. Rb3) 40... Rc6 $1 $16 {[%CAl Rc6b6]} 41. Qf2 ({White should try} 41. Qb4 $16) 41... f5 $11 42. Ng5 Rc4 {[%mdl 8192]} (42... Qd4 $11 {and Black is okay.} 43. Qxd4 exd4) 43. Qb6 $18 Kh6 44. Qf6 Rc7 45. Ra6 {[%csl Ga6][%CAl Rf6g6]} Qg8 46. Qxe5 Rc4 47. Qf6 (47. Ne6 $142 Rc6 48. Rxc6 Bxc6 49. Qf6 Qxe6 50. Qxe6 Ba8 51. Qg8 Kg5 52. Qxa8) 47... Rc7 48. Ne6 { [%CAl Rf6h4] White mates.} Rc4 49. f4 {[%CAl Rf6h4]} Bf3 50. Qxh4+ Bh5 51. a8=Q {Weighted Error Value: White=0.37/Black=0.74} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "2.3"] [White "Gukesh D"] [Black "Shuvalova, Polina"] [Result "1-0"] [ECO "E07"] [WhiteElo "2578"] [BlackElo "2489"] [Annotator "TA"] [PlyCount "165"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 18,165,7,0,0,0,0,0,0,0,0,0,0,16,7,-12,22,0,4,-59,-68,-109,0,-36,-3,-9, -3,-44,-23,-78,-22,-16,-17,-103,-112,-95,16,13,20,25,22,0,0,-14,0,-25,0,0,0,0, 0,0,0,0,33,0,13,0,10,9,9,0,0,0,0,0,1,0,7,5,17,0,87,86,100,68,75,79,97,92,100, 98,98,0,16,16,16,16,79,8,116,108,108,108,208,116,208,177,509,507,414,414,407, 407,29957,339,29958,29958,29958,29958,29961,29963,29960,29962,29954,12791,5503, 5638,29969,29970,29970,29974,29970,29971,29970,29975,29976,29976,29979,29979, 29980,29980,29980,29981,29981,29982,29982,29983,29983,29984,29983,29983,29985, 29986,29986,29987,29989,29989,29989,29990]} 1. d4 Nf6 2. Nf3 e6 3. g3 d5 4. Bg2 Be7 5. c4 O-O 6. Nc3 Nbd7 7. b3 c6 8. O-O b6 9. Bb2 Ba6 {is now debated instead of 9...Bb7.} 10. Nd2 b5 {[%CAl Rb5c4] E07: Closed Catalan: Main Line (5 Nf3 0-0 6 0-0 Nbd7).} 11. c5 b4 12. Na4 Bb5 {The position is equal.} 13. Re1 Qc7 14. Qc2 Rfe8 15. a3 a5 {[#]} 16. Nf1 $5 $146 {[%mdl 8] An interesting novelty.} ({Predecessor:} 16. e3 Bf8 17. f4 g6 18. Bf3 h6 19. Bc1 Bg7 20. Nb2 Qb7 21. a4 Ba6 22. Nd1 {1/2-1/2 (32) Wang,H (2726)-Pridorozhni,A (2599) Khanty Mansiysk 2019}) 16... e5 17. dxe5 Nxe5 18. Ne3 (18. Nb6 $11 Rab8 19. Bd4) 18... Bxa4 $15 19. bxa4 Nfd7 ({Better is} 19... b3 $1 $17 {[%CAl Rb3c2]} 20. Qxb3 Bxc5) 20. Bd4 Bf6 21. Red1 Rab8 22. Bh3 h5 23. Kg2 (23. axb4 $11 axb4 24. Rab1) 23... bxa3 (23... Ng4 $17 {White must now prevent ...Bxd4.} 24. Nxg4 hxg4 25. Bxg4 Re4 26. Bxf6 Nxf6) 24. Rxa3 $11 Rb4 25. Bc3 (25. Bxd7 $11 Nxd7 26. Nf5) 25... Re4 $17 26. Bd4 Nc4 (26... g6 $17 27. Qb2 Ng4 28. Bxg4 Bxd4 29. Rxd4 Rxd4 30. Qxd4 (30. Bxd7 $2 Rb4 $19) 30... Re4 {[%mdl 64] Double Attack}) 27. Nxc4 $11 Rxd4 28. Rxd4 Bxd4 29. Nd6 Rb8 30. Nf5 (30. Bxd7 $5 Qxd7 31. Rf3 $11) 30... Bf6 (30... Be5 {is interesting.} 31. Re3 Nf8 32. Qd2 g6 33. Nd4 Bh8) 31. Re3 { And now Ne7+ would win.} g6 32. Nd6 Ne5 33. f4 Nc4 34. Nxc4 dxc4 35. Qxc4 Kg7 ( 35... Rb4 {feels hotter.} 36. Re8+ Kg7 37. Qd3 Rd4 38. Qe3 Rxa4 39. Rc8 Qe7) 36. Qd3 (36. Rb3 {is more complex.} Rxb3 37. Qxb3 Qd8 38. Qd3 Qxd3 39. exd3 Bd4 40. Bd7) 36... Rd8 (36... Qa7 {is interesting.} 37. Qd6 Qb7 38. Bd7 Rd8 39. Rd3 Qb2) 37. Qc2 (37. Qb1 {seems wilder.} Bd4 38. Re4 Bxc5 39. Qa1+ f6 40. Be6) 37... Rd4 38. Rd3 Qd8 39. Kf1 (39. Rxd4 {with more complications.} Qxd4 40. Bc8 Be7 41. Bb7 Qd7 42. Ba6) 39... Qe7 40. Bg2 Rxd3 41. exd3 Bd4 {Threatens to win with ...Qe3.} 42. Be4 Bxc5 43. Qc3+ Kg8 44. Qxa5 Qd6 (44... f5 $1 $11 {keeps the balance.}) 45. Qc3 $1 $16 Bd4 46. Qxc6 (46. Qc4 {feels hotter.} Bb6 47. h4 Kg7 48. Qc3+ Bd4 49. Qxc6 Qb4 50. Qc2) 46... Qb4 {aiming for ...Qd2.} 47. Qc2 Qa3 48. Kg2 Kg7 49. Bd5 Qa1 50. Kh3 (50. h4 $1 $16) 50... Qf1+ 51. Bg2 Qe1 { ( -> ...Qe6+)} 52. Qc4 Bb6 (52... Be3 $11) 53. Qe4 (53. d4 $1 $16) 53... Qa5 ( 53... Qd1 $1 $11 {remains equal.} 54. Bh1 Qg4+ 55. Kg2 h4) 54. Qe5+ {Black is now going downhill.} Qxe5 55. fxe5 {[%mdl 4096] Endgame KB-KB} Kf8 {[#]} (55... g5 $16 {was worth a try.} 56. Bf3 Kg6) 56. Bd5 ({White should play} 56. g4 $1 $18) 56... Ke7 (56... Bc7 $16 {is a better defense.}) 57. g4 $18 Bc7 $2 {[#]} ( 57... hxg4+ {is more resistant.} 58. Kxg4 Bg1) 58. gxh5 $1 gxh5 59. Kh4 Bxe5 60. h3 f5 (60... Bc7 $18 61. Kxh5 Kf6) 61. Kxh5 $2 (61. a5 {mates} Kf6 62. Kxh5 Bh2 63. a6 Bg1 64. h4 Be3 65. Bc6 Bg1 66. Kh6) 61... Kf6 $2 (61... Kd6 $18 62. Bb7 Bc3) 62. a5 Bd4 63. a6 Be3 64. Bc6 Bf2 65. Kh6 Bd4 66. Kh7 (66. h4 $142 Be3+ 67. Kh7 Ke7 68. Bf3 Kf7 69. h5 Kf6 70. Kg8 Kg5 71. Kf7) 66... Kg5 67. Kg8 Kh4 68. Bd7 {White mates.} f4 69. Bg4 Kg3 70. Kf7 f3 {[#]} 71. Bxf3 $1 { [%mdl 512]} Kxf3 {KB-K3P} (71... Kxh3 72. Ke6) 72. Ke6 Kg3 73. Kd5 Ba7 74. Kc6 Kxh3 {KB-KPP} 75. Kb7 Bd4 76. a7 Bxa7 77. Kxa7 {KP-K} Kg4 78. Kb6 Kf5 79. d4 Kf6 80. Kc6 Ke7 81. d5 Ke8 82. Kc7 Ke7 83. d6+ {Weighted Error Value: White=0. 18/Black=0.47} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "2.2"] [White "Yoo, Christopher Woojin"] [Black "Mammadzada, Gunay"] [Result "0-1"] [ECO "D10"] [WhiteElo "2457"] [BlackElo "2443"] [Annotator "TA"] [PlyCount "144"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 11,144,23,34,33,30,29,36,27,22,16,14,10,37,29,35,9,14,11,13,0,0,0,0,0,2, -7,-12,-16,-15,-20,-9,-8,-14,-51,-51,-57,-52,-192,-174,-200,-201,-186,-153, -241,-220,-224,-210,-210,-207,-231,-248,-456,-456,-438,-387,-387,-335,-473, -464,-447,-414,-358,-275,-252,-289,-259,-187,-187,-167,-177,-155,-187,-187, -217,-155,-155,-168,-263,-263,-416,-394,-568,-263,-263,-226,-235,-35,-837,-819, -857,-812,-1683,-1519,-1156,-241,-241,-235,-326,-300,-5695,-5097,-12799,-12684, -5089,-6079,-6070,-4958,-29947,-4622,-29974,-29975,-6629,-4614,-29976,-29978, -29978,-29979,-29979,-29979,-29980,-29979,-29979,-29980,-29979,-29979,-29981, -29980,-29980,-29981,-29981,-29980,-29982,-29983,-29983,-29984]} 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. cxd5 cxd5 5. Bf4 Nc6 6. e3 Bg4 7. Qb3 {D10: Slav Defence: 3 cxd5 (without early Nf3) and 3 Nc3.} Na5 8. Qa4+ Bd7 9. Qc2 {With the idea Nb5. White is slightly better.} e6 10. Nf3 Be7 11. Bd3 Nh5 12. Be5 f6 13. Bg3 f5 14. O-O Rc8 15. Ne5 O-O 16. Qe2 Be8 17. Rac1 a6 {[#]} 18. Rc2 $146 ({Predecessor:} 18. Nb1 Nxg3 19. hxg3 Nc6 20. Nxc6 Bxc6 21. Nd2 Qb6 22. Nf3 Bf6 23. Rc2 Ba4 24. b3 {1/2-1/2 (47) Harsha,B (2296)-Bajarani,U (2496) Pune 2014}) 18... Bd6 19. Rfc1 Nxg3 20. hxg3 Bxe5 21. dxe5 Nc6 22. Na4 Rb8 $1 23. Nc5 Qe7 24. Nxa6 (24. Qe1 $15) 24... bxa6 $19 25. Rxc6 Bxc6 26. Rxc6 Rfc8 27. Rxa6 (27. Rc2 $17) 27... Rc1+ 28. Kh2 Qg5 29. Ra4 Rbc8 {Strongly threatening ...R8c4!} 30. Rh4 Ra1 31. Qh5 $2 (31. Bc2 Rxa2 32. Ba4) 31... Qxh5 32. Rxh5 {[%mdl 4096] Endgame KRR-KRB} Rcc1 {[%csl Ga1][%CAl Rc1h1]} 33. g4 g6 34. Rg5 (34. Rh4 {was necessary.} Rh1+ 35. Kg3) 34... Kf7 35. gxf5 exf5 36. g4 h6 (36... Rxa2 37. gxf5 Rc6 38. e4 $17) 37. e6+ Kf6 (37... Kxe6 38. Rxg6+ Ke7 39. Bxf5 $11) 38. e7 Kxe7 39. Rxg6 Rh1+ ({Much less strong is} 39... Rxa2 40. Bxf5 Rxb2 41. Kg2 $15) 40. Kg3 Rhg1+ ({Inferior is} 40... Rxa2 41. Bxf5 Rxb2 42. Re6+ Kf7 43. Rc6 $11) 41. Kf3 fxg4+ 42. Kf4 Rxa2 43. Ke5 Rxb2 44. Bf5 (44. Rxh6 {was called for.} Rxf2 45. Rh7+ Kf8 46. Bf5) 44... h5 45. Re6+ (45. Rh6 $142) 45... Kd8 $1 46. Rh6 (46. Rd6+ {is a better defense.} Kc7 47. Rd7+ Kc6 48. Rd6+ Kc7 49. Rd7+ Kb6 50. Rd6+ Kc5 51. Rxd5+ Kb4 52. Rd4+ Ka5 53. Rd5+ Kb4 54. Rd4+ Kc3 55. Rd3+ Kc4 56. Rd4+ Kc5 57. Rd5+ Kb4) 46... Rxf2 (46... Kc7 $142 47. Rxh5 Rxf2) 47. Kd6 { [%CAl Rh6h8]} Ke8 48. Be6 Kf8 $2 (48... Ra1 $1 $19 49. Rh8+ Rf8 50. Rxh5 Ra6+ 51. Ke5 g3) 49. Rg6 $2 {[%mdl 8192] [#]} (49. Rxh5 $15 Kg7 50. Rg5+ Kf6 51. Rxg4) 49... Rf7 $1 50. Bxd5 (50. Ke5 Rg7) 50... Rgf1 51. Bxf7 Kxf7 {KR-KR} ({ Weaker is} 51... Rxf7 52. Rg5 $17) 52. Rg5 Rh1 $2 (52... Kf6 53. Rxh5 Rd1+ 54. Kc7 g3 55. Rh6+ Kf5 56. Rh5+ Ke4) 53. Ke5 Rh3 $1 54. Kf4 {[#] If only White now had time for e4....} Kf6 $1 55. Rf5+ $2 {[#]} (55. Rg8) 55... Kg6 $1 56. Rg5+ Kh6 {( -> ...Rf3+)} 57. Rg8 Rf3+ 58. Ke4 Rf7 59. Kd3 Rg7 60. Rh8+ Kg5 61. Ke2 g3 62. Kf3 Kh4 {Black mates.} 63. Kg2 Rf7 64. Kg1 Rc7 65. e4 Rc1+ 66. Kg2 Rc2+ 67. Kf3 Rf2+ 68. Ke3 Rf7 69. Rg8 Kh3 70. e5 h4 71. Ke4 g2 72. e6 Rf1 { Weighted Error Value: White=0.86/Black=0.29} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "2.1"] [White "Keymer, Vincent"] [Black "Saduakassova, Dinara"] [Result "1-0"] [ECO "E15"] [WhiteElo "2591"] [BlackElo "2500"] [Annotator "TA"] [PlyCount "85"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 19,85,0,8,20,17,7,13,0,0,-15,37,-20,0,0,65,65,66,62,66,66,101,93,116, 131,235,212,238,245,258,256,264,252,261,260,257,251,272,277,276,269,277,270, 266,276,284,275,264,281,483,478,496,489,482,414,414,392,457,440,445,444,515, 470,515,515,489,489,489,481]} 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. b3 Bb4+ 6. Bd2 Be7 7. Bg2 d5 8. cxd5 exd5 9. Nc3 O-O 10. O-O Re8 11. Ne5 {E15: Queen's Indian: 4 g3 sidelines, 4 g3 Ba6 and 4 g3 Bb7 early deviations.} Bb7 {[#]} 12. h4 $5 $146 {[%mdl 8] New and interesting.} ({Predecessor:} 12. Bg5 Nbd7 13. e3 h6 14. Bxf6 Nxf6 15. Rc1 c6 16. Qc2 Nd7 17. Nd3 a5 18. Qb2 Ba6 {1/2-1/2 (80) Nakamura,H (2736)-Martirosyan,H (2622) Chess.com INT 2020}) 12... Nbd7 13. Bf4 {The position is equal.} Nf8 14. e3 c5 (14... Ne6 $11) 15. Ng4 ({White should try} 15. dxc5 $14 Bxc5 16. Nd3) 15... Rc8 16. dxc5 bxc5 ({Black should play} 16... Rxc5 $11 17. Rc1 Ne4 18. Nxe4 dxe4) 17. Rc1 $14 Ne4 18. Nxe4 dxe4 19. Ne5 Ne6 {Black is now going downhill.} 20. Qc2 Nxf4 21. exf4 Bf6 {[#]} (21... Bd6 $16) 22. Rfd1 $1 $18 {[%CAl Rd1d8]} (22. Bxe4 $6 Bxe4 23. Qxe4 Bxe5 $16) 22... Qb6 {[#]} 23. Nc4 {[%CAl Rc4b6]} (23. Bxe4 Bxe5 24. fxe5 (24. Bxh7+ Kf8 $17) 24... Rxe5 $14) 23... Qa6 {intending ...Bd4.} 24. Nd6 Bd4 25. Nxc8 Bxc8 26. Bxe4 g6 27. Re1 Qa5 28. Kg2 Bb7 {With the idea ...Rxe4.} 29. f3 Ba6 30. Red1 Kg7 31. Rb1 {[%CAl Bc1b1,Bb1e1,Be1e2][%mdl 32]} Qb6 32. Bd3 Bb7 33. Re1 Qc6 ( 33... Rd8 {was called for.} 34. h5 Qd6) 34. Be4 Rxe4 35. Rxe4 ({Weaker is} 35. fxe4 Qe6 $18) ({Not} 35. Qxe4 Qxe4 36. Rxe4 Bxe4 $18) 35... Qd6 36. Rbe1 Bxe4 37. Qxe4 {[%mdl 4096] Endgame KQR-KQB} ({But not} 37. fxe4 Qc6 $18) 37... Qa6 38. Qe2 {White is clearly winning.} Qa3 39. Qc2 Qb4 40. Re2 a5 41. f5 Qb7 42. fxg6 hxg6 43. h5 {Weighted Error Value: White=0.09/Black=0.26} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "1.10"] [White "Mammadzada, Gunay"] [Black "Saduakassova, Dinara"] [Result "0-1"] [ECO "E11"] [WhiteElo "2443"] [BlackElo "2500"] [Annotator "TA"] [PlyCount "96"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 22,96,0,0,0,0,16,-64,-64,-34,-12,-11,-11,-63,-67,-101,-101,-107,-81,-95, -80,-71,-9,-8,-8,-6,0,-9,0,-9,-10,-14,-1,-1,-1,-29,-18,-29,-33,-28,-28,-23,-22, -47,358,368,362,346,329,0,-10,-231,-226,-233,-233,-233,-231,-233,-233,-235, -216,-235,-218,-283,-222,-352,-307,-532,-484,-395,-489,-443,-426,-375,-329, -442,-239]} 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Bb4+ 5. Bd2 Be7 6. Nf3 O-O 7. O-O c6 8. Qb3 b6 9. Nc3 Bb7 10. Rfd1 Nbd7 11. Rac1 Rc8 {[#]} 12. Bf4 $146 ({ Predecessor (3):} 12. Ne1 c5 13. cxd5 cxd4 14. d6 Bxg2 15. dxe7 Qxe7 16. Nxg2 Nc5 17. Qa3 dxc3 18. Bxc3 Rfd8 19. Rxd8+ Rxd8 20. Bb4 {1/2-1/2 (33) Wojtaszek, R (2749)-Yu,Y (2764) Shenzhen 2018}) 12... Nh5 {E11: Bogo-Indian.} 13. Bd2 Nhf6 14. Ne5 (14. a3 $11) 14... Nxe5 $15 {Black is slightly better.} 15. dxe5 Nd7 16. cxd5 cxd5 17. Bf4 (17. Nb5 $11) 17... g5 18. Be3 Nxe5 19. Nb5 Rxc1 20. Rxc1 Nc4 21. Nxa7 Nxe3 ({Black should try} 21... Qd7 $17 {Threatens to win with ... Ba6.} 22. Nb5 Nxe3 23. fxe3 Rc8 24. Rxc8+ Qxc8) 22. Qxe3 $11 Bc5 23. Qe5 Bd6 24. Qe3 Bc5 25. Qe5 h6 26. a3 Qb8 27. Qxb8 Rxb8 28. b4 Bd6 29. Nb5 Be5 30. e3 Ba6 31. Nd4 {And now Nc6 would win.} Ra8 32. Rc3 Bc4 $2 {[%mdl 8192] [#]} ( 32... g4 $15) 33. Rxc4 $1 $18 {[%mdl 576] Pin} Rxa3 34. Rc8+ Kg7 {If only Black now had time for ...Bxd4....} 35. Bf3 $2 (35. b5 $18) 35... Bxd4 $11 36. exd4 $2 (36. Bh5 $11 {and White is okay.} Be5 37. Rc6) 36... Rxf3 {[%mdl 4096] Endgame KR-KR} 37. Rc6 Rd3 38. Rxb6 Rxd4 39. Kf1 Rd2 40. b5 Rb2 41. Rb8 Kf6 42. b6 h5 43. Kg2 (43. Rb7 {is the only way for White.}) 43... Ke5 44. Kf3 $2 {[#]} (44. Rh8 {keeps fighting.}) 44... g4+ $19 45. Ke3 Rb3+ 46. Kd2 Ke4 47. Kc2 Rb5 48. Rf8 f5 {Weighted Error Value: White=0.56/Black=0.32} (48... Rxb6 $142 49. Rxf7 e5) 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "1.9"] [White "Shuvalova, Polina"] [Black "Yoo, Christopher Woojin"] [Result "0-1"] [ECO "C03"] [WhiteElo "2489"] [BlackElo "2457"] [Annotator "TA"] [PlyCount "56"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 15,56,10,22,-2,35,29,27,31,42,28,58,-26,29,-21,-11,0,0,-42,-55,-101,-55, -125,-122,-318,-316,-322,-323,-275,-97,-1097,-1079,-1044,-1027,-29991,-29992, -29993,-29994,-29994,-29995,-29995,-29996,-29998,-29999]} 1. e4 e6 2. d4 d5 3. Nd2 Be7 4. Bd3 c5 5. dxc5 Nf6 6. exd5 exd5 7. Ngf3 O-O 8. O-O Bxc5 9. Nb3 { C03: French Tarrasch: Unusual Black 3rd moves.} Be7 10. h3 Nc6 11. Re1 { White has an edge.} Re8 12. c3 {[#]} Ne4 $146 ({Predecessor:} 12... Be6 13. Nbd4 Nxd4 14. Nxd4 Bc5 15. Be3 b6 16. Bc2 h5 17. Qd3 g6 18. Bg5 Be7 19. Nxe6 { 1-0 (27) Smal,T (1928)-Los,K (1388) Koszalin 2013}) 13. c4 (13. Nbd4 $14) 13... Bb4 (13... Bf5 $142) 14. Rf1 (14. Bg5 $5 f6 15. Bd2 $14) 14... dxc4 15. Bxc4 Qf6 16. a3 Bf8 17. Re1 Bf5 18. Nbd2 ({White should try} 18. Be3 $1 $15) 18... Rad8 $17 {Strongly threatening ...Bc5.} 19. Qa4 $2 {[#]} (19. Re2 $17) 19... Nxf2 $1 $19 {[%mdl 512]} 20. Kxf2 {And now Rxe8 would win.} ({Reject} 20. Rxe8 Rxe8 21. Qb5 {[#]} a6 $1) 20... Bc5+ 21. Kf1 Qd6 $2 (21... Rxe1+ $19 {is more deadly.} 22. Kxe1 Nd4 23. Nxd4 Qh4+ 24. Kd1 Qxd4 25. Bxf7+ Kxf7 26. Qxd4 Bxd4) 22. Rxe8+ $4 {[%mdl 8192]} (22. Ne4 $17 Bxe4 23. Rxe4 Rxe4 24. Bxf7+ Kxf7 25. Qxe4 Qd1+ 26. Qe1) 22... Rxe8 {[%CAl Bd8e8,Be8e4,Be4e3,Be3e1][%mdl 32]} 23. Qb5 a6 24. Qb3 Qg3 {[%csl Gc5][%CAl Rg3f2] Black mates.} 25. Bxf7+ Kh8 {[%csl Gc5] [%CAl Rg3f2]} 26. Ne4 Rxe4 {[%csl Gc5][%CAl Rg3f2]} 27. Be3 Rxe3 28. Qd5 {[#]} Re1+ $3 {[%mdl 512] Weighted Error Value: White=0.76/Black=0.20} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "1.8"] [White "Zhansaya"] [Black "chessfun64"] [Result "*"] [Annotator "NA"] [PlyCount "7"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] [TimeControl "600+5"] 1. e4 {[%emt 0:00:00]} c6 {[%emt 0:00:00]} 2. d4 {[%emt 0:00:03]} d5 {[%emt 0: 00:03]} 3. e5 {[%emt 0:00:02]} Bf5 {[%emt 0:00:08]} 4. Nd2 {[%emt 0:00:05]} * [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "1.8"] [White "Abdumalik, Zhansaya"] [Black "Gukesh D"] [Result "0-1"] [ECO "B12"] [WhiteElo "2472"] [BlackElo "2578"] [Annotator "TA"] [PlyCount "124"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 10,124,19,19,24,14,14,3,20,17,22,6,15,0,14,2,11,0,6,0,13,-36,-21,-21, -21,-71,-22,-62,-30,-91,-92,-98,-98,-88,-33,-45,-30,-81,0,-12,0,0,0,0,0,0,15,2, 12,0,28,25,40,22,19,0,0,-177,-175,-191,-197,-203,-203,-204,-78,-255,-256,-256, -179,-537,-534,-450,-488,-552,-541,-662,-583,-633,-582,-1075,-984,-2577,-2417, -1622,-795,-1494,-1352,-1133,-700,-1175,-1004,-752,0,-622,-612,-374,-374,-2308, -1337,-5189,-2484,-29973,-29974,-29974,-29973,-29972,-29973,-29975,-29977, -29978,-29978,-29978,-29978,-29978,-29979,-29979,-29978]} 1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nd2 e6 5. Nb3 Nd7 6. Nf3 Ne7 {B12: Caro-Kann: Advance Variation.} 7. c3 Nc8 $5 {[%mdl 4] [#] Exploring less charted territory.} 8. Bd3 $146 ({ Predecessor:} 8. Bg5 Qc7 9. Nh4 Be4 10. f3 Bg6 11. Nxg6 hxg6 12. Be3 Be7 13. f4 Bh4+ 14. Kd2 {1/2-1/2 (72) Abergel,T (2547)-Svetushkin,D (2554) France 2010}) 8... Bxd3 {The position is equal.} 9. Qxd3 Be7 10. h4 h6 11. Bf4 Ncb6 12. a4 Nc4 13. Qc2 a5 14. Nbd2 b5 15. b3 Nxd2 16. Bxd2 Nb6 17. g3 Qd7 18. O-O O-O 19. Nh2 (19. axb5 $11 {remains equal.} cxb5 20. Rfb1) 19... bxa4 $17 20. bxa4 Nc4 21. Bc1 f5 (21... c5 $17) 22. exf6 $15 Bxf6 23. Ng4 (23. Ba3 $11 {keeps the balance.} Nxa3 24. Rxa3) 23... Kh8 (23... e5 $17 24. Ne3 exd4 25. Nxc4 dxc4 26. cxd4 Qxd4) 24. Qg6 Qe8 25. Qxe8 Raxe8 26. Rb1 e5 27. dxe5 Nxe5 28. Nxf6 Rxf6 29. Be3 Nf3+ 30. Kg2 Re4 31. Rb8+ Kh7 32. Ra1 Rc4 $1 33. Ra3 $2 {[#]} (33. h5 $11) 33... Ne1+ $1 $19 34. Kh3 Nc2 35. Rab3 Nxe3 ({Inferior is} 35... Rxa4 36. Bf4 $15) 36. fxe3 {[#]} Rxa4 {[%mdl 4096] Endgame KRR-KRR} (36... Re6 $1 $19 { and Black stays clearly on top.} 37. Ra8 Rxa4) 37. Ra8 $2 (37. Re8 $17) 37... h5 38. Rbb8 Rg4 39. Rf8 $2 (39. Kg2 {is a better chance.}) 39... Rxf8 40. Rxf8 {KR-KR} Rc4 41. Ra8 Rxc3 42. Rxa5 {If only White now had time for e4....} Rxe3 43. Rc5 Re6 44. g4 Kg6 45. gxh5+ Kxh5 46. Kg3 Rg6+ (46... g5 $142 47. hxg5 Kxg5 ) 47. Kh3 Rf6 48. Kg3 Kg6 49. Kg4 Kf7 50. Ra5 Kg6 $2 (50... d4 $19 51. Ra7+ Ke6 ) 51. h5+ $2 {[%mdl 8192]} (51. Rc5 $11 d4 52. Rg5+ Kh7 53. Rh5+ Rh6 54. Rf5) 51... Kh6 52. Ra8 {[%CAl Ra8h8]} g6 53. Rh8+ $2 (53. hxg6 Kxg6 54. Ra7) 53... Kg7 54. Rd8 gxh5+ 55. Kxh5 Kf7 {Black mates.} 56. Kg5 Ke6 57. Rc8 Ke5 58. Rd8 Rf1 59. Rc8 Kd6 60. Kg4 Kc5 61. Kg3 d4 62. Kg2 Rf7 {Weighted Error Value: White=0.75/Black=0.34} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "1.7"] [White "Lei, Tingjie"] [Black "Badelka, Olga"] [Result "1-0"] [ECO "B69"] [WhiteElo "2505"] [BlackElo "2418"] [Annotator "TA"] [PlyCount "71"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 25,71,37,61,22,32,0,40,18,25,-29,31,26,33,6,14,0,16,16,18,14,19,-205, -201,-193,-191,-178,-165,-164,-150,-139,-125,-422,-54,-574,11,35,375,368,1467, 1432,1195,1114,797,746,656,108,66,0]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6 8. O-O-O Bd7 9. f4 Be7 10. Nf3 b5 11. Bxf6 gxf6 12. Kb1 Qb6 13. f5 O-O-O 14. Bd3 {B69: Sicilian: Richter-Rauzer: 7...a6 8 0-0-0 Bd7 9 f4 Be7 10 Nf3 b5 11 Bxf6.} Kb8 15. Rhf1 {[#]} Rc8 $146 ({ Predecessor:} 15... Bc8 16. g4 Rdg8 17. h3 h5 18. Rg1 hxg4 19. Rxg4 Rd8 20. a4 Ne5 21. Nxe5 dxe5 22. fxe6 fxe6 23. axb5 axb5 {0-1 (41) Golubka,P (2373) -Greenfeld,A (2568) Gothenburg 2016}) 16. Ne2 Ne5 17. Ned4 ({White should play } 17. Nf4) 17... Nxf3 (17... b4 $11) 18. Nxf3 $14 e5 19. Rc1 Bc6 20. Qe2 d5 21. exd5 Bxd5 22. Nd2 Rhd8 23. Be4 $2 {[#]} (23. Rfd1 $11) 23... Bxa2+ $1 $19 { [%mdl 576] Decoy} 24. Kxa2 {Threatens to win with Rcd1.} Qa5+ {[%mdl 64] Double Attack} 25. Kb1 {Black must now prevent Nb3.} Rxd2 26. Qe3 Rd4 {Hoping for ...Rcc4.} 27. c3 Ra4 {And now ...Bc5 would win.} 28. Rfd1 $2 {[%mdl 8192]} (28. Bd5 $17) 28... Bc5 $2 (28... b4 $1 $19 {[%CAl Rb4b3]} 29. c4 (29. Rd7 $2 Ra1+ 30. Kc2 Qa4+ {[%mdl 64] Double Attack} 31. Kd2 Qxd7+ $19) 29... Ra1+ 30. Kc2 Rxc4+ 31. Kd2 Bc5 $1 {[%mdl 512]} 32. Rxa1 Bxe3+ 33. Kxe3 Qc5+ 34. Kf3 Kc7 {[%mdl 64] Decoy}) 29. Qd3 $2 {[%mdl 8192] [#]} (29. Qf3 $1 $15) 29... Bb6 $2 ( 29... Bd4 $1 $19 {[%mdl 512]} 30. Bf3 Ra1+ 31. Kc2 {[#]} Rxc3+ $3 {[%mdl 512]} 32. Qxc3 Rxc1+ 33. Rxc1 Bxc3 34. bxc3 Qa2+ 35. Kd1 Qc4) 30. Qd6+ $11 Bc7 $2 { [%mdl 8192]} ({Black should try} 30... Rc7 $1 $14) 31. Qc6 $18 {[%csl Ge4] [%CAl Rc6b7]} Ra1+ $2 (31... Rxe4 32. Qxe4 Qa4 33. Qxa4 bxa4) 32. Kc2 {[%csl Ge4][%CAl Rc6b7]} Qa4+ 33. b3 {[%csl Ge4][%CAl Rc6b7]} Rxc1+ 34. Kxc1 {[%csl Ge4][%CAl Rc6b7]} Qa1+ 35. Kd2 $2 (35. Kc2 $18 {[%csl Ge4][%CAl Rc6b7] and the rest is easy.} Qxc3+ 36. Qxc3) 35... Rd8+ $16 36. Ke3 {[%mdl 32768] Never resign too early! Weighted Error Value: White=0.99/Black=0.89. Sensor Board Error (Ke4/e5)?} (36. Bd5 $1 $14 Rxd5+ 37. Qxd5 Qb2+ 38. Kd3) 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "1.6"] [White "Bjerre, Jonas Buhl"] [Black "Salimova, Nurgyul"] [Result "1/2-1/2"] [ECO "B12"] [WhiteElo "2542"] [BlackElo "2395"] [Annotator "TA"] [PlyCount "132"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,131,14,22,25,24,13,13,4,67,67,82,91,57,56,167,82,222,219,237,169,183, 118,111,89,80,79,85,97,100,62,44,41,85,25,46,12,173,0,71,66,163,54,66,-11,-19, -15,-12,-193,-18,-19,-15,-18,-15,-22,0,0,0,-22,-22,-104,-25,-20,-32,-25,-14, -93,0,0,0,0,46,54,90,99,97,0,0,0,30,-196,-174,-179,-70,-69,-64,-58,-23,-64,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nd2 {[%CAl Bb1d2,Bd2b3,Bb3d4][%mdl 32]} e6 5. Nb3 c5 6. dxc5 {B12: Caro-Kann: Advance Variation.} Bxc5 7. Bb5+ Nc6 8. a4 {[#]} Be7 $146 ({Black should play} 8... Qb6 $11) ({Predecessor:} 8... Qb6 9. Nxc5 Qxc5 10. c3 Qb6 11. Be3 Qc7 12. f4 Nge7 13. Nf3 O-O 14. O-O f6 15. exf6 Rxf6 {1/2-1/2 (31) Vallejo Pons,F (2694)-Lupulescu,C (2643) Batumi 2019}) 9. Nd4 $1 $14 {[%CAl Rd4c6]} Qc7 10. Nxf5 exf5 11. Nf3 O-O-O (11... a6 $14 12. Bxc6+ Qxc6) 12. O-O ( 12. Bxc6 $18 {has better winning chances.} Qxc6 13. O-O) 12... d4 (12... Nxe5 $16 13. Nxe5 Qxe5) 13. Qd3 $18 g6 14. Qc4 {And now Bxc6 would win.} f6 15. e6 ( 15. Bxc6 $18 Qxc6 16. Qf7) 15... Bd6 $16 16. Bxc6 (16. c3 {looks sharper.} Nge7 17. cxd4 g5 18. g3 Kb8 19. Bd2) 16... Qxc6 17. Qxc6+ bxc6 18. Nxd4 Ne7 19. c3 Rhe8 20. Re1 a6 21. a5 (21. Bh6 $16) 21... Kc7 22. Ra4 Be5 $2 (22... c5 $11 23. Rc4 Nc6 24. Nxc6 Kxc6) 23. Rc4 $2 (23. Nb3 $18) 23... Rd5 (23... Bxd4 $11 { keeps the balance.} 24. cxd4 (24. Rxd4 Rxd4 25. cxd4 Nd5 $11) 24... Nd5) 24. Nb3 Nc8 (24... Rb5 $14) 25. f4 (25. Rh4 $18) 25... Bd6 $1 $14 26. Nd4 (26. g3 $14) 26... Bc5 $11 27. Be3 Nd6 28. Nb5+ $2 cxb5 $2 (28... axb5 $19 29. Rxc5 Rd3 ) 29. Rxc5+ Rxc5 30. Bxc5 $19 {[%mdl 4096] Endgame KRB-KRN} Ne4 31. Bb6+ Kc6 32. Rd1 Nd6 33. b3 Rxe6 34. Kf2 (34. Kf1 $11) 34... g5 (34... Ne4+ $1 $17 35. Kf3 Rd6 36. Rxd6+ Kxd6) 35. fxg5 fxg5 36. Kf3 h5 37. Rd2 (37. b4 $11) 37... g4+ (37... Re1 $17) 38. Kf4 $11 h4 39. h3 gxh3 40. gxh3 Re4+ {[#]} 41. Kg5 $1 Re8 { [#] aiming for ...Ne4+.} 42. Rd4 ({Better is} 42. Rd3 $1 $16) 42... Rg8+ $1 43. Kf6 Rg3 44. Ke6 $2 (44. Rxh4 $11 {and White has nothing to worry.} Rxc3 45. b4) 44... Re3+ $19 45. Kf6 {Hoping for Rxd6+!} Rxh3 (45... Rxc3 $19 46. b4 Rxh3) 46. c4 $1 $15 bxc4 47. bxc4 Rc3 (47... Rh1 $5 {[%CAl Rh4h3]} 48. Rd5 Ne4+ 49. Ke7 Rc1 50. Rxf5 Rxc4 $11) 48. c5 Ne4+ (48... Nc4 $15 49. Rxh4 Kb5) 49. Kxf5 $11 {The position is equal.} Nxc5 50. Rxh4 Nd7 51. Bd8 Rc5+ 52. Kf4 Rc4+ (52... Kb5 {seems wilder.} 53. Rh1 Rc4+ 54. Kf5 Nc5 55. Re1 Rc3) 53. Ke3 Rxh4 54. Bxh4 {KB-KN} Kb5 55. Bd8 Ne5 56. Kd2 Nc6 57. Bc7 Nxa5 58. Bxa5 Kxa5 {KP-K} 59. Kc3 ( 59. Kc1 {with more complications.} Ka4 60. Kb2 Kb5 61. Kc2 Kc4 62. Kb2) 59... Ka4 60. Kb2 $1 a5 {[%CAl Ba6a5,Ba5a4,Ba4a3,Ba3a2][%mdl 32]} 61. Ka2 (61. Ka1 { feels hotter.} Kb5 62. Kb2 Kc4 63. Ka2 Kd5 64. Ka1) 61... Kb4 62. Kb2 a4 63. Ka2 a3 64. Ka1 Kb3 65. Kb1 a2+ 66. Ka1 Ka3 {Never resign too early! Weighted Error Value: White=0.36/Black=0.32} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "1.5"] [White "Praggnanandhaa R"] [Black "Liang, Awonder"] [Result "0-1"] [ECO "E52"] [WhiteElo "2608"] [BlackElo "2592"] [Annotator "TA"] [PlyCount "98"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 19,98,5,25,11,21,22,23,0,0,0,0,-8,0,0,6,5,76,85,79,88,55,51,128,50,125, 127,125,145,122,117,117,117,117,114,143,127,186,183,194,185,311,215,214,183, 179,116,103,0,8,8,8,0,0,0,0,0,0,0,0,0,0,0,0,-80,-80,-1063,-679,-29980,-29980, -29980,-29981,-29981,-29982,-29982,-29983,-29982,-29983,-29988,-29989,-29989, -29989]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 b6 6. Nf3 Bb7 7. Bd3 d5 8. cxd5 exd5 9. Rc1 a6 10. O-O Bd6 11. Ne5 {E52: Nimzo-Indian: Rubinstein: 4... 0-0 5 Nf3 d5 6 Bd3 b6.} c5 12. f4 Nc6 13. Be1 {White has an edge.} cxd4 14. Nxc6 Bxc6 15. Ne2 Bb5 16. Nxd4 Bxd3 17. Qxd3 Ne4 {[#]} (17... Re8 $11 {keeps the balance.}) 18. Nf5 $146 ({Predecessor:} 18. Nc6 Qe8 19. Qxd5 Bc5 20. Nd4 Rd8 21. Qc4 Nd6 22. Qb3 Nb5 23. Bf2 Nxd4 24. exd4 Bxd4 25. Bxd4 Rxd4 26. Qxb6 { 1-0 (63) Manush,S (2324)-Raja,H (2472) Chess.com INT 2020}) 18... g6 19. Nh6+ Kg7 20. Qxd5 {Threatens to win with Nxf7.} Qe7 {[#]} (20... Bc5 $14 21. Qxe4 Re8) 21. Ng4 (21. Nxf7 $1 $16 {[%mdl 512]} Bc5 22. Rxc5 $1) 21... Rad8 ({ Black should play} 21... Rac8 $14 22. Rxc8 Rxc8) 22. Rc4 $36 {[%mdl 2048] White is on the roll.} Rfe8 {[#]} 23. Rxe4 $1 {[%mdl 576] Remove Defender} Qxe4 24. Bc3+ Kf8 25. Qg5 {[%mdl 1024] White has strong compensation.} Qf5 { Threatening ...Qxg5.} 26. Qh6+ {[%mdl 64] Double Attack} Ke7 27. Bf6+ Kd7 ( 27... Ke6 $16) 28. Ne5+ $18 Bxe5 29. fxe5 Qe4 (29... Qe6 $142) 30. Bxd8 Kxd8 31. Rxf7 Qxe5 {[%mdl 4096] Endgame KQR-KQR} 32. Qh4+ (32. h4 $18) 32... g5 33. Qd4+ (33. Qc4 $16 {Intending Qd3+ and mate.} Qxe3+ 34. Kh1 Qe1+ 35. Rf1) 33... Qxd4 $11 34. exd4 {KR-KR} Re2 35. Rxh7 Rxb2 36. a3 Ra2 37. Rg7 Rxa3 38. Rxg5 b5 {[%CAl Bb6b5,Bb5b4,Bb4b3,Bb3b2][%mdl 32]} 39. h4 {h5 is the strong threat.} b4 {Hoping for ...b3.} 40. Rg8+ Kc7 {Strongly threatening ...b3.} 41. d5 {[#]} ( 41. Rg7+ $11 {remains equal.} Kb6 42. h5) 41... Ra5 $1 $17 {aiming for ...b3.} 42. Rg5 $2 {[%mdl 8192]} (42. Rg7+ $17 Kd8 43. Rg3 Rxd5 44. Kf2) 42... Rb5 $19 43. h5 b3 {Black mates.} 44. Rg7+ Kd6 45. Rg6+ Kxd5 46. Rg5+ Ke6 47. Rg6+ Kf7 48. Rxa6 b2 49. Ra7+ Kg8 {Never resign too early! Weighted Error Value: White=0.53/Black=0.14} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "1.4"] [White "leonmessi"] [Black "SaraKhadem"] [Result "*"] [Annotator "NA RC"] [PlyCount "13"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] [TimeControl "600+5"] 1. Nf3 {[%emt 0:00:00]} d5 {[%emt 0:00:00]} 2. d4 {[%emt 0:00:13]} Nf6 { [%emt 0:00:08]} 3. c4 {[%emt 0:00:04]} e6 {[%emt 0:00:02]} 4. Nc3 {[%emt 0:00: 04]} a6 {[%emt 0:00:15]} 5. cxd5 {[%emt 0:00:22]} exd5 {[%emt 0:00:02]} 6. Bg5 {[%emt 0:00:03]} Be6 {[%emt 0:00:07]} 7. e3 {[%emt 0:00:14]} * [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "1.4"] [White "Mendonca, Leon Luke"] [Black "Khademalsharieh, Sarasadat"] [Result "0-1"] [ECO "D37"] [WhiteElo "2549"] [BlackElo "2494"] [Annotator "TA"] [PlyCount "138"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,138,27,28,28,25,25,24,22,33,27,24,25,34,31,33,32,31,22,30,18,32,22,18, 12,23,16,33,18,18,14,16,15,14,0,18,1,8,0,10,0,0,0,0,0,0,0,0,0,0,-20,-18,-17,-8, -71,-41,-14,-29,-87,-80,-112,-93,-95,-20,-183,0,-374,-374,-344,-356,-332,-270, -320,-306,-458,-466,-582,-574,-1033,-602,-1016,-698,-674,-667,-808,-462,-985, -929,-912,0,-835,-822,-800,-766,-2906,-1094,-1247,-1002,-1068,-1054,-992,-952, -933,-893,-687,-609,-29954,-29958,-29956,-29949,-10831,-9109,-5832,-3008,-2227, -2378,-1881,-1731,-29966,-29966,-29966,-29962,-29975,-29976,-29977,-29978, -29978,-29979,-29979,-29980,-29982,-29983]} 1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. Nc3 a6 5. cxd5 exd5 6. Bg5 {D37: Queen's Gambit Declined: 5 Bf4.} Be6 7. e3 Nbd7 8. Bd3 {White has an edge.} Bd6 9. O-O c6 10. Bf4 Qb8 11. Bxd6 Qxd6 12. h3 O-O 13. Qb3 Rab8 14. a4 a5 {[#]} 15. Qc2 $146 ({Predecessor:} 15. Qa3 Ne8 16. Rfb1 Qxa3 17. Rxa3 Nd6 18. b4 Ra8 19. b5 c5 20. dxc5 Nxc5 21. Rd1 {0-1 (63) Giri,A (2764) -Izoria,Z (2602) Chess.com INT 2020}) 15... h6 16. Rfc1 Rfc8 17. Ne2 Rc7 18. Nf4 Rbc8 19. Qd2 b6 20. b3 Ne4 21. Qb2 c5 22. Nxe6 Qxe6 23. dxc5 bxc5 24. Bb5 Nb6 25. Rc2 c4 26. Rac1 Nc5 27. Nd4 Qf6 {With the idea ...Nd3.} 28. Qa3 ({ Reject} 28. bxc4 Nd3 $17) 28... Nd3 29. Rb1 Nb4 30. Rc3 Nd7 31. bxc4 (31. Bxd7 $11 Rxd7 32. Qb2) 31... dxc4 $17 32. Bxd7 Rxd7 33. Rbc1 (33. Qb2 $11 {remains equal.}) 33... Rdc7 34. Qa1 Rc5 35. Qb1 h5 (35... Qe5 $17) 36. Qe4 $2 {White is on the road to losing.} (36. Nb3 $1 $11 {and White stays safe.} Na2 37. Nxc5 Nxc3 38. Qb2) 36... g6 $2 ({Black should play} 36... Na2 $19 37. Qb1 Nxc3 38. Rxc3 Qg6) 37. g3 $2 {[%mdl 8192]} (37. Nb3 $1 $11 Nd3 38. Rxd3 (38. Nxc5 Qxf2+ 39. Kh2 Nxc1 $17) 38... cxb3 39. Rxc5 Rxc5 40. Rxb3) 37... Na2 $19 {[%mdl 64] [#] Double Attack} 38. R1c2 Nxc3 39. Rxc3 Kg7 40. Kg2 Rb8 41. Rc2 (41. Qc2 { only move.}) 41... Rb4 42. Kh2 Rxa4 43. Ne2 Rb4 44. Nf4 Qf5 45. Qd4+ Kh7 46. e4 Qe5 47. Qe3 (47. Qxe5 $142 Rxe5 48. Nd5) 47... Rb3 48. Qe2 Rb4 $2 (48... h4 $19 49. Qg4 hxg3+ 50. fxg3 Qxe4) 49. Qf3 $2 {[%mdl 8192]} (49. Qe3 $11 Rb3 50. Qe2) 49... Kg7 50. Nd5 Rb2 51. Rc3 {[#]} a4 (51... Rxd5 $142 $1 52. Kg1 (52. exd5 Qe1) 52... Rdd2 53. Rxc4 a4 54. Rxa4 Qc5 55. Ra3 Qc1+ 56. Kg2 Rxf2+ 57. Qxf2 Rxf2+ {[%mdl 64] Discovered Attack} 58. Kxf2 Qxa3 59. e5 Qb2+ 60. Ke3 Qxe5+ 61. Kd3 Qxg3+ 62. Kd4 Qxh3 63. Kd5 Qb3+ 64. Kd6 h4 65. Kd7 h3 66. Kc7 h2 67. Kd7 h1=Q 68. Ke8 Qbd5 69. Ke7 Qhe4#) 52. Qe3 Rxd5 53. exd5 Qxe3 54. Rxe3 Rxf2+ { [%mdl 4096] Endgame KR-KR} 55. Kg1 Rd2 56. Ra3 Rxd5 57. Rxa4 Rc5 58. Ra2 c3 59. Rc2 Kf6 60. Kf2 Ke5 61. Ke3 Kd5 62. Kd3 Rc4 63. Ke2 Ke4 {Black mates.} 64. Kd1 Kf3 65. Ra2 Kxg3 66. Ra7 Rf4 67. Rc7 Kxh3 68. Rxc3+ Kg2 69. Rc2+ Rf2 {Weighted Error Value: White=0.58/Black=0.48} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "1.3"] [White "jinbojinbo"] [Black "Volodar_Murzin"] [Result "*"] [Annotator "NA RC"] [PlyCount "12"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] [TimeControl "600+5"] 1. e4 {[%emt 0:00:00]} c6 {[%emt 0:00:00]} 2. d4 {[%emt 0:00:04]} d5 {[%emt 0: 00:02]} 3. f3 {[%emt 0:00:10]} dxe4 {[%emt 0:00:46]} 4. fxe4 {[%emt 0:00:03]} e5 {[%emt 0:00:01]} 5. Nf3 {[%emt 0:00:06]} Be6 {[%emt 0:00:08]} 6. c3 { [%emt 0:00:17]} Nd7 {[%emt 0:01:03]} * [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "1.3"] [White "Zhu, Jiner"] [Black "Murzin, Volodar"] [Result "0-1"] [ECO "B12"] [WhiteElo "2462"] [BlackElo "2502"] [Annotator "TA"] [PlyCount "126"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 11,126,10,15,8,26,15,46,31,31,20,86,31,115,70,77,76,133,128,165,142,197, 199,207,184,184,184,171,171,163,179,177,170,237,229,303,214,608,25,133,138,141, 54,64,0,0,0,0,0,13,0,0,0,0,0,-4,-1,0,-58,-42,-43,-37,-72,-51,-52,-38,-136,-74, -115,-66,-68,-46,-45,-43,-121,-102,-109,-26,-40,0,-539,-539,-536,-528,-511, -510,-552,-539,-531,-516,-497,0,-418,-371,-469,-470,-475,-475,-475,-471,-468, -470,-437,-437,-426,-419,-361,-293,-498,-486,-479,-465,-416,-377,-1039,-1104, -29983,-29984]} 1. e4 c6 2. d4 d5 3. f3 dxe4 4. fxe4 e5 5. Nf3 Be6 6. c3 Nd7 7. Bd3 {B12: Caro-Kann: Advance Variation.} Bd6 8. O-O h6 9. Na3 {White is slightly better.} Ngf6 10. Nc4 {[#]} Qc7 $146 (10... Bxc4 $11 11. Bxc4 O-O) ({ Predecessor:} 10... Bxc4 11. Bxc4 Qe7 12. Bd3 O-O-O 13. Qa4 Nc5 14. dxc5 Bxc5+ 15. Kh1 Rxd3 16. b4 Bb6 {1-0 (45) Lyell,M (2188)-Mostbauer,F (2304) Budapest 2021}) 11. Kh1 (11. Nxd6+ $16 Qxd6 12. h3) 11... Rd8 (11... Bxc4 $14 12. Bxc4 O-O) 12. Nxd6+ $16 Qxd6 13. Qe1 g5 (13... O-O $142) 14. Bc2 Qe7 15. b3 (15. Nxe5 $6 Nxe5 16. dxe5 Ng4 $16) (15. dxe5 Nh5 $16) 15... Rg8 (15... c5 $16 16. d5 (16. Nxe5 Nxe5 17. dxe5 Ng4 $16) (16. dxe5 Nh5 $16) 16... Bg4) 16. a4 $18 ( 16. Nxe5 $6 Nxe5 17. dxe5 Ng4 $16) 16... c5 17. d5 (17. Nxe5 $6 Nxe5 18. dxe5 Ng4 $16) (17. dxe5 $6 Ng4 $16) 17... Bg4 18. Nd2 Bh5 19. Nc4 Bg6 20. Ba3 b6 21. b4 Rc8 (21... Nxd5 {might work better.} 22. bxc5 (22. exd5 Bxc2 23. bxc5 bxc5 $16) 22... bxc5) 22. Rb1 Nxd5 {With the idea ...cxb4.} 23. bxc5 Nxc5 (23... bxc5 24. exd5 Bxc2) 24. Nxe5 $2 Nf4 (24... Qxe5 $11 {remains equal.} 25. exd5 Qxe1 26. Rbxe1+ (26. Rfxe1+ Kd8 $11) 26... Kd8 27. Bxg6 fxg6) 25. Nxg6 $16 Rxg6 26. g3 (26. a5 $16) 26... Nfd3 $14 27. Bxd3 ({Better is} 27. Qe2 $14 Ne5 28. a5 ) 27... Nxd3 $11 28. Bxe7 Nxe1 29. Bf6 Nc2 30. e5 Ne3 31. Rf3 {[%CAl Rf3e3]} Nd5 (31... Rxc3 {is more complex.} 32. e6 g4 33. Rf4 Rd3 34. Rc1 fxe6 35. Rc8+ Kf7) 32. Rd1 $1 {[%CAl Rd1d5]} Nxf6 ({Wrong is} 32... Nxc3 $2 33. Rxc3 $1 { [%mdl 512]} Rb8 34. Rc7 $18) 33. exf6 {[%mdl 4096] Endgame KRR-KRR} Rc6 34. Rdf1 (34. Re3+ $11 Re6 35. Red3 Rexf6 36. Rd8+ Ke7 37. R1d7+ Ke6 38. Rxa7) 34... Kd7 35. Kg2 Rd6 36. g4 Kc6 37. Rf5 Re6 38. R1f3 ({White should try} 38. c4 $15) 38... Rg8 (38... Re4 $142 39. h3 Rxa4) 39. Kg3 Rge8 40. h4 Re5 41. hxg5 hxg5 42. Rf2 (42. c4 $15) 42... R8e6 43. Rf1 Kc5 (43... Rd5 $17 44. Rxd5 Kxd5 45. Rd1+ Kc6) 44. Rh1 Kd5 45. Rh7 $2 {[%mdl 8192]} (45. Rd1+ $11 Kc6 46. Rd8) 45... Rxf5 $19 46. gxf5 Rxf6 {KR-KR} 47. Kg4 {[#]} Ke5 $1 48. Kxg5 Rxf5+ 49. Kg4 Rf4+ 50. Kg3 Rf5 $2 (50... a5 $19 51. Kg2 Rxa4 52. Rxf7 Ke4) 51. Rh4 $2 { [%mdl 8192]} (51. Kg4 $1 $11 {and White is okay.} Ke4 52. Rh2) 51... Kd6 52. Rd4+ Rd5 {aiming for ...Rxd4.} 53. Rf4 f5 54. Kf2 Ke5 55. Rh4 Rc5 56. Rh7 Ra5 57. Rh4 Kf6 58. Rd4 Ke6 59. Kf3 $2 (59. Rh4) 59... Rc5 60. Rd3 Rc4 61. Re3+ Kf6 62. a5 $2 (62. Rd3) 62... bxa5 63. Ke2 Re4 {What a bad dream for White. Weighted Error Value: White=0.71/Black=0.40} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "1.2"] [White "nihalsarin"] [Black "ChessWarrior04"] [Result "*"] [Annotator "NA"] [PlyCount "8"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] [TimeControl "600+5"] 1. e4 {[%emt 0:00:00]} c6 {[%emt 0:00:00]} 2. d4 {[%emt 0:00:04]} d5 {[%emt 0: 00:02]} 3. e5 {[%emt 0:00:01]} Bf5 {[%emt 0:00:03]} 4. g4 {[%emt 0:00:00]} Be4 {[%emt 0:00:02]} * [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "1.2"] [White "Nihal Sarin"] [Black "Abdusattorov, Nodirbek"] [Result "0-1"] [ECO "B12"] [WhiteElo "2620"] [BlackElo "2634"] [Annotator "TA"] [PlyCount "142"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,142,0,0,-34,3,0,3,2,-4,-3,18,25,41,37,81,70,79,62,75,50,65,-39,-30, -68,6,-86,-23,-37,-37,-34,0,7,46,29,106,44,50,35,112,142,185,0,104,0,178,178, 590,597,562,595,582,583,616,616,555,610,577,593,621,621,566,606,579,590,608, 333,325,259,259,259,281,280,295,289,359,289,288,259,296,279,286,285,285,285, 737,737,715,688,682,668,454,454,425,354,281,270,241,246,246,239,220,235,648, 257,257,102,102,102,94,-443,-427,-452,-441,-447,-435,-683,-647,-4590,-4180, -4132,-4132,-1779,-1767,-29963,-29964,-29972,-29973,-29976,-29976,-29969,-5673, -5575,-5469,-4918,-1044]} 1. e4 c6 2. d4 d5 3. e5 Bf5 4. g4 Be4 5. f3 Bg6 6. e6 {B12: Caro-Kann: Advance Variation.} Qd6 7. exf7+ $1 Bxf7 8. Nc3 {The position is equal.} Nd7 {[#]} 9. f4 $146 ({Predecessor:} 9. Be3 O-O-O 10. Qd2 g6 11. O-O-O Bg7 12. Bh3 Kb8 13. Qf2 Nb6 14. Bf1 Ka8 15. Nh3 {1-0 (29) Dudin,D (2165) -Mukhina,M (1861) Saratov 2008}) 9... g5 10. fxg5 O-O-O 11. Be3 Bg7 12. Qd2 e5 13. O-O-O Ne7 14. Nf3 Rhf8 15. Bh3 (15. Kb1 $14) 15... Ng6 $15 {[%mdl 1024] Black has compensation.} 16. Rhf1 Be6 (16... c5 $15 17. dxe5 Ndxe5 18. Nxe5 Bxe5) 17. Rde1 (17. dxe5 $11 Ngxe5 18. Nxe5 Bxe5 19. Ne4 $1 (19. Bxa7 $2 b6 $19 )) 17... e4 ({Better is} 17... Qc7 $17) 18. Ng1 $11 Nb6 {aiming for ...Nc4.} 19. b3 Nd7 20. Rf5 Nh4 (20... Bxf5 $2 21. gxf5 Rf7 22. fxg6 $18) 21. Ref1 a6 ({ Avoid the trap} 21... Nxf5 $2 22. gxf5 Qa3+ 23. Kb1 $18) (21... Ng6 $11 { remains equal.}) 22. Kb1 (22. Nce2 $16) 22... Ng6 $14 (22... Nxf5 $2 23. gxf5 Qe7 24. Nce2 $18) 23. R1f2 Nh4 {[#]} ({But not} 23... Bxf5 $2 24. gxf5 Kb8 25. fxg6 $18) (23... Rg8 $14) 24. Bf4 $1 $16 Qe7 (24... Qa3 25. Bg3) 25. Be3 (25. Bg3 $1 $18) 25... Qd6 (25... Nxf5 $2 26. gxf5 Bxf5 27. Bxf5 $18) 26. Bf4 Qe7 $1 $18 {[#]} 27. Bg3 $1 $40 {[%mdl 128] Hoping for Rxf8. Black is in trouble.} Bxf5 (27... Nxf5 28. gxf5 Nf6 29. Na4 $18) (27... Ng6 {is tougher.}) 28. gxf5 e3 {[#]} 29. Nxd5 $1 {[%mdl 576] Clearance} cxd5 30. Qa5 {[%csl Gg3][%CAl Ra5c7]} Be5 31. Bxe5 Qxe5 32. dxe5 exf2 {[#]} 33. Nf3 {[%mdl 512]} Rxf5 (33... Nxf3 34. Qc3+) 34. Nxh4 f1=Q+ 35. Bxf1 Rxf1+ 36. Kb2 Re8 37. Qxd5 Nxe5 38. g6 hxg6 {[#]} 39. Nxg6 $1 {[%mdl 512]} Re1 (39... Nc6 40. h4) 40. Nf4 Nc6 41. h4 Rd8 42. Qf5+ Kb8 43. Ne6 Rdd1 44. Qf4+ Ka7 45. Qf2+ Kb8 46. Nc5 Nd4 $2 (46... Ka8 47. h5 Re7) 47. Qf7 {[%csl Gc5][%CAl Rf7b7]} Rb1+ 48. Kc3 {[%csl Gc5][%CAl Rf7b7]} Nb5+ 49. Kb4 {[%csl Gc5][%CAl Rf7b7]} Nd6 50. Qd7 Rbd1 {intending ... a5+.} 51. Qd8+ Ka7 52. Nd7 {[%csl Gd7][%CAl Rd8b8]} Re8 53. Qb6+ Ka8 54. Qf2 Nc8 {[#]} 55. Nc5 {Black must now prevent Qf3!} Rd5 $2 (55... Rde1 56. Qf3 R1e7 ) 56. c4 $2 (56. Qf7 {[%csl Gc5][%CAl Rf7b7]} Rd4+ 57. Kc3) 56... Rde5 57. h5 $2 (57. Ka3 $18 {and White stays clearly on top.}) 57... Rh8 $16 58. h6 { [%mdl 64] Decoy} Rxh6 59. Qf4 $2 {[%mdl 8192]} (59. Qf8 $16 Rc6 60. Na4) 59... Rb6+ $19 60. Ka3 Rxc5 61. Qf8 Rbc6 62. Qf4 (62. Qh8 $142) 62... Na7 63. Qf8+ Rc8 64. Qd6 Ra5+ 65. Kb2 Nc6 66. Qe6 Rh8 67. Qe2 Rah5 68. Qe3 Rh2+ 69. Ka3 Rg2 (69... R8h5 $142 70. c5 R5h4 71. Qg5 Ka7 72. Qe3 Rc2 73. Qe6 Rhh2 74. b4 Rc3+ 75. Qb3 Rxb3+ 76. Kxb3 Rh3+ 77. Kc4 Rh4+ 78. Kd5 Rxb4 79. Kd6 Ra4 80. Kd5 a5 81. Kd6 Rxa2 82. Ke6 Rf2 83. Kd6 a4 84. Kd5 Rf4 85. Kd6 a3 86. Ke6 a2 87. Kd7 a1=Q 88. Ke8 Qe5+ {[%mdl 64] Double Attack} 89. Kd7 Rf7+ 90. Kc8 Qh8#) 70. Qf3 Rhh2 {[%csl Gh2][%CAl Rg2a2]} 71. Qf8+ Nb8 {What a bad dream for White. Weighted Error Value: White=0.47/Black=0.32} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "1.1"] [White "Yip, Carissa"] [Black "Keymer, Vincent"] [Result "0-1"] [ECO "A11"] [WhiteElo "2430"] [BlackElo "2591"] [Annotator "TA"] [PlyCount "56"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 12,56,6,0,2,0,9,18,20,13,18,12,17,-16,-22,-29,0,-24,18,8,24,35,45,0,3, -17,-13,-16,-17,-19,-12,-39,-30,-29,-17,-56,-58,-299,-283,-379,-370,-527,-299, -324,-274,-404,-416]} 1. Nf3 d5 2. g3 c6 3. Bg2 Bg4 4. c4 e6 5. O-O Nd7 6. cxd5 exd5 7. d3 Bc5 {A11: English Opening: 1...c6.} 8. h3 Bh5 9. Qc2 Ne7 {The position is equal.} 10. e4 O-O 11. Nc3 Bb6 {[#]} 12. Bg5 $146 ({Predecessor:} 12. b3 Rc8 13. Na4 Bc7 14. Bb2 c5 15. Nc3 d4 16. Ne2 b6 17. Bc1 f6 18. Bf4 { 1-0 (77) Velikov,P (2430)-Mohandesi,S (2332) France 2005}) 12... f6 {[#] White must now prevent ...Bxf3.} 13. Bd2 Bf7 14. Rfe1 Rc8 15. d4 dxe4 16. Nxe4 Bc7 17. Bb4 {Bxe7 is the strong threat.} Re8 18. Nd6 Bxd6 19. Bxd6 Nb6 20. Bc5 Qd7 21. Nd2 Nf5 22. Be4 Bg6 23. Rad1 Nd5 $1 24. Nc4 $2 {This costs White the game.} ({Not} 24. Bxa7 $2 b6 $19) (24. Qd3 $15) 24... b6 $19 {[%CAl Bb7b6,Bb6b5][%mdl 32]} 25. Ba3 b5 26. h4 (26. Qd2 $142 bxc4 27. Bg2) 26... Rxe4 27. Qxe4 {[#]} Nfe3 $1 {[%mdl 512]} 28. Qf3 (28. Qxg6 $142 hxg6 29. Nxe3) 28... Nxc4 { Weighted Error Value: White=0.50/Black=0.18} ({Much less strong is} 28... Nxd1 29. h5) 0-1