[Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "16.1"] [White "Keymer, Vincent"] [Black "Murzin, Volodar"] [Result "0-1"] [ECO "E62"] [WhiteElo "2591"] [BlackElo "2502"] [Annotator "TA"] [PlyCount "102"] [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 14,102,46,45,48,14,27,19,22,21,23,20,35,20,55,32,67,71,82,69,189,45,90, 53,98,91,102,95,106,98,89,99,316,133,170,147,144,129,115,112,112,108,120,127, 106,89,95,91,102,67,60,20,27,21,27,33,33,45,71,61,75,0,0,0,0,-133,-133,-133, -133,-114,-40,-206,-133,-195,-195,-1433,-1431,-1369,-1344,-1335,-1304,-1220, -1204,-29991,-29992,-29992,-29993,-29993,-29993,-29993,-1012]} 1. c4 Nf6 2. Nf3 g6 3. Nc3 Bg7 4. g3 O-O 5. Bg2 d6 6. d4 Nc6 7. O-O Bf5 {Recently 7...e5 got a lot of attention.} 8. Ne1 Re8 {[#] E62: King's Indian: Fianchetto: 6...c6 and Panno Variation (6...Nc6) without ...a6.} 9. h3 $146 ({Predecessor:} 9. e4 Bg4 10. f3 Bd7 11. Nc2 e5 12. d5 Nd4 13. Be3 Nxc2 14. Qxc2 Nh5 15. c5 {1/2-1/2 (15) Martinez Alcantara,J (2620)-Guseinov,G (2665) Chess.com INT 2020}) 9... Qc8 10. g4 Bd7 {The position is equal.} 11. Nc2 h5 12. f3 e5 13. d5 $36 {[%mdl 2048] Black is under pressure.} Na5 14. b3 e4 15. Bb2 {[%CAl Rc3e4]} ({Don't play} 15. fxe4 hxg4 16. hxg4 Nxg4 $15) 15... exf3 16. exf3 c6 (16... Nh7 $14) 17. Kh1 (17. Ne4 $1 $18 {[%CAl Re4f6]} Nxe4 18. Bxg7) 17... a6 18. dxc6 Nxc6 19. Qxd6 Be6 20. Na4 Qd8 21. Rad1 Qxd6 22. Rxd6 Bf8 $2 {[#]} 23. Rdd1 (23. Rxc6 $1 $18 { [%mdl 512]} bxc6 24. Bxf6) 23... Nd7 24. gxh5 Bf5 25. Nd4 Nxd4 26. Bxd4 b5 27. Nc3 {Nd5 is the strong threat.} bxc4 28. hxg6 fxg6 29. bxc4 Rac8 30. f4 Bg7 31. Bb7 Rc7 32. Bxa6 {Threatens to win with Nb5.} (32. Bd5+ {is more complex.} Kf8 33. Rf3 Bxd4 34. Rxd4 Re1+ 35. Kg2) 32... Bxd4 33. Rxd4 {Hoping for Nb5.} Nc5 34. Bb5 Re3 35. Nd5 Rxh3+ 36. Kg2 Ra7 37. Rf2 (37. a4 $1 $16) 37... Kf8 $11 38. Re2 Raa3 39. Nf6 (39. Kg1 $11) 39... Rag3+ $17 40. Kf2 {Strongly threatening Nh7+!} Nd3+ 41. Rxd3 Bxd3 ({Black should play} 41... Rxd3 $17 42. Nd5 Rh2+ 43. Ke1 Rh1+ 44. Kf2 Ra3) 42. Re8+ $2 (42. Re1 $1 $15 g5 43. Nd5) 42... Kf7 { [%mdl 1024] Black has strong compensation.} 43. Nd5 (43. Ne4 $17 {is a better defense.} Bxe4 44. Rxe4) 43... Rf3+ $19 44. Ke1 $2 {[#]} (44. Kg2) 44... Rh2 $1 {[%csl Gd3][%CAl Rf3f1]} 45. Re7+ Kf8 {[%csl Gd3][%CAl Rf3f1]} 46. Re8+ Kg7 { [%csl Gd3][%CAl Rf3f1]} 47. Re7+ Kh6 {[%csl Gd3][%CAl Rf3f1]} 48. Ne3 Rg3 { Black mates.} 49. Nf1 Rg1 {[%csl Gd3][%CAl Rg1f1]} 50. Kd1 Rxf1+ {[%mdl 64] Double Attack} 51. Re1 Bc2+ {Quite a comeback for Black. Weighted Error Value: White=0.61/Black=0.18} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "16.2"] [White "Abdusattorov, Nodirbek"] [Black "Khademalsharieh, Sarasadat"] [Result "0-1"] [ECO "D35"] [WhiteElo "2634"] [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 19,126,31,29,20,24,25,66,21,42,25,18,0,31,22,39,18,35,0,6,0,0,-3,44,40, 47,35,44,59,66,76,75,24,18,20,25,24,11,0,0,0,0,-24,10,17,11,7,7,11,12,8,8,0,48, 34,65,10,21,8,41,25,45,17,30,29,27,0,11,0,0,0,0,0,5,0,0,0,0,0,0,-12826,-10370, -12828,-12830,-12829,-12829,-12834,-12831,-12831,-12831,-12832,-12829,-5489, -12812,-12825,-1278,-12835,-12835,-12835,-12835,-12835,-12835,-12841,-12841, -12837,-12827,-4686,-856,-806,-778]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 exd5 6. Bg5 O-O 7. e3 c6 8. Bd3 h6 9. Bh4 Nbd7 10. Nge2 Re8 11. O-O { D35: Queen's Gambit Declined: Exchange Variation.} Be7 12. f3 {[#]} b6 $146 ({ Predecessor:} 12... b5 13. Rad1 Bb7 14. Bf2 Rc8 15. Bf5 c5 16. dxc5 Bxc5 17. Nxb5 Ba6 18. Nec3 Bxb5 19. Nxb5 Bxe3 {1/2-1/2 (36) Harvey,D (2301)-Babic,D (2478) ICCF email 2017}) 13. Kh1 {White is slightly better.} Bb7 14. Rae1 c5 15. Bf5 cxd4 16. exd4 a6 17. a4 Nf8 18. Qb3 Qd6 19. Bb1 Rac8 20. Ng3 {With the idea Nf5.} Qb4 (20... g6 {is interesting.} 21. Ba2 Qc7 22. Bxf6 Bxf6 23. Nxd5 Bxd5 24. Qxd5 Rxe1 25. Rxe1 Rd8) 21. Qxb4 Bxb4 22. Bxf6 {And now Rxe8 would win.} Rxe1 23. Rxe1 Bxc3 24. bxc3 {aiming for Nf5.} gxf6 25. Nf5 (25. Ne2 $16) 25... Rxc3 $11 26. Nxh6+ Kg7 27. Nf5+ Kg8 28. h4 Ne6 29. h5 {h6 is the strong threat.} Bc6 30. h6 {Strongly threatening Nd6.} Bxa4 31. Ne7+ {[%mdl 64] [#] Double Attack} Kh8 32. Nxd5 {[%mdl 64] Double Attack} Rc4 33. Nxb6 Rxd4 34. Nxa4 Rxa4 {[%mdl 4096] Endgame KRB-KRN} 35. g4 {Black must now prevent Bf5.} Rd4 36. Bf5 Rd8 37. Rb1 ({White should play} 37. Kg2 $14) 37... Nd4 38. Be4 Nb5 39. Rc1 Nd6 40. Bd3 a5 {[%CAl Ba6a5,Ba5a4,Ba4a3][%mdl 32]} 41. Rc6 f5 42. g5 Kh7 43. f4 Kg6 44. Rc7 a4 45. Ra7 a3 46. Kg2 a2 47. Kg3 Nc8 48. Ra6+ Rd6 { Threatens to win with ...Rxa6.} ({Avoid the trap} 48... f6 $2 49. Rxf6+ Kh7 50. Bxf5+ Kh8 51. Ra6 $18) 49. h7 $2 {[%mdl 8192] White is now going downhill.} ( 49. Bxf5+ $11 Kxf5 50. Rxa2) 49... Kg7 $19 {Black is clearly winning.} 50. Rxa2 Rxd3+ {KRN-KR} 51. Kf2 Kxh7 52. Ra6 Nd6 53. Ke2 Rd5 54. Kf3 Ne4 55. Ke3 {[#]} Rd3+ $3 {[%mdl 512]} 56. Ke2 Rd6 57. Ra8 Nc3+ 58. Ke3 Nd5+ 59. Kf3 Rb6 60. Ra5 Rb3+ 61. Kf2 Rd3 62. Ra4 Kg6 63. Ra6+ Kh5 {Weighted Error Value: White=0.53/ Black=0.18} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "16.3"] [White "Yip, Carissa"] [Black "Liang, Awonder"] [Result "1/2-1/2"] [ECO "D02"] [WhiteElo "2430"] [BlackElo "2592"] [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 9,115,29,102,-14,54,53,45,22,109,-37,-36,-57,65,35,63,64,148,151,138,47, 357,119,195,165,208,198,208,204,247,255,316,290,285,279,279,285,283,291,288, 283,371,387,503,509,831,513,490,512,504,491,463,325,322,306,347,339,326,291, 263,237,452,472,465,460,447,449,485,466,575,402,637,456,689,679,591,591,738, 560,548,548,457,550,523,489,4586,3724,1393,798,818,712,1333,1330,1309,1283, 1172,1266,5320,29964,29984,29985,29986,0,0,0,29973,0,0,0]} 1. Nf3 d5 2. g3 Nc6 3. d4 Bf5 4. Bg2 Qd7 5. c4 dxc4 (5... e6 $1 $11) 6. Na3 {D02:1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4.} (6. d5 $16 Bxb1 7. Rxb1 ( 7. dxc6 Qxd1+ 8. Kxd1 Be4 $11)) 6... O-O-O (6... e5 $11 7. Nxc4 e4) 7. Nxc4 $14 {[#]} f6 $146 ({Predecessor:} 7... Nxd4 8. Nxd4 Qxd4 9. Qb3 Be4 10. Be3 Qd5 11. f3 Bf5 12. O-O b5 13. Na5 e5 {1-0 (40) Donka,P (2230)-Szilagyi,Z (2323) Hungary 2008}) 8. O-O {White is slightly better.} Bh3 (8... e5 $1 $11) 9. Be3 ( 9. Bxh3 $16 Qxh3 10. Bd2) 9... Bxg2 $1 $15 10. Kxg2 h5 (10... e6 $15) 11. h4 Nh6 12. Qa4 $36 {[%mdl 2048] White is pushing.} Nf5 (12... e6 $14) 13. d5 $1 $16 {[%CAl Rd5c6]} Qxd5 14. Bxa7 (14. Rad1 $16 Nxe3+ 15. Nxe3) 14... Nxa7 $2 { [%mdl 8192] [#]} ({Better is} 14... Nfd4 $14) 15. e4 $2 (15. Rac1 $1 $18 Qb5 16. Qxa7) 15... Qc5 (15... Qxe4 $2 {[#]} 16. Nb6+ $1 {[%mdl 512]} cxb6 17. Qxe4 $18) (15... Qb5 $16 16. Qxa7 Nd6) 16. exf5 {Black must now prevent Rac1.} Kb8 17. Rfd1 Rc8 18. Ne3 g5 19. fxg6 ({Resist} 19. hxg5 $6 fxg5 20. Rac1 (20. Nxg5 Bh6 $18) 20... Qb5) 19... Bh6 20. Rac1 Qb5 21. Qe4 Rhg8 22. Rc3 ({Don't do} 22. Qxe7 $6 Rge8 $16) 22... Bxe3 23. Rxe3 Qe8 24. Nd4 e5 {[#]} 25. Rb3 $1 {[%csl Gb3][%CAl Re4b7]} b6 (25... c6 26. Nf5) 26. Nf5 Rxg6 {[#]} (26... Qc6 $142 27. Rd5 Rce8) 27. Nd6 $1 {[%csl Gd6][%CAl Re4b7][%mdl 576] Double Attack} Qc6 28. Qxc6 Nxc6 29. Nxc8 Kxc8 $18 {[%mdl 4096] Endgame KRR-KRN} 30. Rc3 Nd4 31. a4 Kb7 32. b4 c6 33. Re3 Rg7 34. Kf1 c5 $2 (34... Kc7 35. a5 Rg4) 35. bxc5 bxc5 36. Rc3 Kc6 37. Rdc1 Ne6 38. a5 {[%CAl Ba4a5,Ba5a6][%mdl 32]} f5 39. Re1 e4 ( 39... Kd5 $142 40. Rce3 e4) 40. a6 Kd5 (40... Ra7 $142 41. Ra1 Nd4) 41. Rb1 Ra7 42. Rb6 c4 {[#]} 43. Rxc4 $3 {[%mdl 576] Deflection} Kxc4 44. Rxe6 {KR-KR} Kd5 45. Rh6 Ke5 46. Ke2 f4 (46... Rc7 $142 47. Kd2 Rc4 48. Rxh5 Ra4) 47. Rxh5+ Kd4 48. Rh6 f3+ 49. Kd2 Rd7 50. h5 Ke5+ 51. Ke1 Rc7 52. Rb6 Rc1+ 53. Kd2 Ra1 54. h6 Ra2+ 55. Ke1 Ra1+ 56. Kd2 Ra2+ 57. Ke1 $2 (57. Kc3 {mates} Ra1 58. Kb2 Rf1 59. a7 Rxf2+ 60. Kc3 Ra2 61. h7 Ra3+ 62. Kb4) 57... Ra1+ $11 58. Kd2 {Weighted Error Value: White=0.51/Black=0.67} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "16.4"] [White "Nihal Sarin"] [Black "Salimova, Nurgyul"] [Result "0-1"] [ECO "D05"] [WhiteElo "2620"] [BlackElo "2395"] [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 9,90,4,9,4,45,12,51,42,54,23,28,32,54,19,22,2,3,14,30,0,-7,-7,-14,-14, 24,8,18,12,13,3,9,0,15,14,91,97,91,91,106,52,64,39,39,41,41,43,59,6,21,0,-1, -62,-52,-127,-111,-111,-47,-36,-36,-37,0,-169,0,0,0,-704,-698,-29984,-1016, -952,-429,-1977,-1856,-29987,0,-826,0,-1612,-1562,-29990,-29991,-29991,-29992] } 1. b3 Nf6 2. Bb2 d5 3. Nf3 e6 4. e3 Bd6 5. d4 O-O 6. Bd3 {D05: Colle System with ...e6.} a5 {6...b6 gains popularity.} 7. a3 {[#]} a4 $146 ({Predecessor:} 7... b6 8. Nbd2 Ba6 9. c4 Nbd7 10. O-O c5 11. Qc2 cxd4 12. exd4 Rc8 13. Rfc1 Qe7 {0-1 (52) Lai,H (2455)-Schoppen,C (2508) Amstelveen 2019}) 8. b4 {White is slightly better.} b6 9. O-O Ba6 10. b5 Bb7 11. Nbd2 c5 12. bxc6 Nxc6 13. c4 Ba6 14. Qe2 Na5 15. cxd5 Bxd3 16. Qxd3 {Black must now prevent dxe6.} Nxd5 17. e4 Nf4 18. Qe3 Ng6 19. g3 Qd7 20. h4 f5 21. Qd3 Nb3 (21... Ne7 $11 {remains equal. }) 22. Nxb3 $16 axb3 23. e5 Bc7 24. Qxb3 (24. d5 $1 $16 {[%CAl Rd5d6]}) 24... Ne7 $1 $14 25. Bc3 Nd5 26. Bb4 Rfc8 27. Rac1 Bd8 28. Kg2 (28. Nd2 $14) 28... h6 29. Bd6 g5 30. hxg5 ({White should play} 30. Bb4 $11) 30... hxg5 $15 31. Nd2 $2 (31. Rxc8 Rxc8) 31... g4 $17 {[%mdl 1024] Black has strong compensation.} 32. f4 Qh7 (32... b5 $1 $17 {[%CAl Yd8b6]} 33. Kg1 Be7) 33. Rh1 $1 $15 {[%CAl Rh1h7]} Qb7 {( -> ... Nxf4+)} 34. Kf2 b5 35. Rc5 $2 (35. Bc5 $1 $11 Ba5 36. Rh5 Bxd2 37. Rch1) 35... Rxc5 $2 (35... Bb6 $1 $19 36. Rxd5 (36. Qxb5 $2 Nxf4 { [%mdl 64] Discovered Attack} 37. gxf4 Qxh1 $19) 36... Qxd5 37. Qxd5 exd5) 36. dxc5 $11 Ba5 $40 {[%mdl 128] Black is up to no good.} 37. Nf1 {[%mdl 8192]} ( 37. Rd1 $2 Bc3 $19) (37. Nf3 Bc3 (37... gxf3 38. Qxf3 Qg7 39. Qh5) 38. Ng5) 37... Bc3 $19 ({And not} 37... Nxf4 38. gxf4 Qxh1 39. Qxe6+ Kh8 40. Qf6+ Kg8 41. Qg5+ Kh7 42. Qe7+ (42. Qxf5+ Kh8 $16) 42... Kh8 43. Qf6+ Kh7 44. Qf7+ (44. Qxf5+ Kh8 $16) 44... Kh8 45. Qf6+ $16) 38. Rh6 {[#]} Bd4+ (38... Nxf4 $142 $1 { [%mdl 512]} 39. Qxc3 (39. c6 Qxc6) 39... Qg2+ 40. Ke3 Ra4 $1 41. Rg6+ Kh7 42. Rg7+ {[%mdl 64] Decoy} Kxg7 43. Bf8+ Kg6 44. Qd3 Nxd3 45. c6 Re4+ {[%mdl 64] Double Attack} 46. Kxd3 Qe2+ 47. Kc3 Rc4+ {[%mdl 64] Double Attack} 48. Kb3 Qc2#) 39. Ke1 {[#]} b4 (39... Rxa3 $142 $3 {[%mdl 512]} 40. Qxa3 Nc3) 40. a4 ( 40. Rxe6 $142 Rxa3 41. Re7) 40... Bc3+ 41. Kf2 {[#]} Bd4+ (41... Nxf4 $142 $1 { [%mdl 512]} 42. c6 (42. Rg6+ Kh7) 42... Qxc6 43. Qxe6+ Nxe6 44. Bc5 Qxc5+ { [%mdl 64] Double Attack} 45. Ke2 Rxa4 46. Ne3 Ra2+ 47. Kf1 Qxe3 {[%mdl 64] Double Attack} 48. Rh8+ Kf7 49. Rf8+ Nxf8 50. e6+ Qxe6 51. Kg1 Qe1#) 42. Ke1 Bc3+ $2 (42... Qa6 $19 {Threatens to win with ...Bc3+.} 43. Qd1 Qc4) 43. Nd2 $2 {[%mdl 8192]} (43. Kf2 $11) 43... Qa6 {aiming for ...Qd3!} 44. Qc2 Ne3 { [%csl Ge3][%CAl Ra6f1]} 45. Rg6+ Kh7 {[%csl Ge3][%CAl Ra6f1] Weighted Error Value: White=1.00/Black=0.56} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "16.5"] [White "Zhu, Jiner"] [Black "Badelka, Olga"] [Result "1-0"] [ECO "B52"] [WhiteElo "2462"] [BlackElo "2418"] [Annotator "RC"] [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"] [TimeControl "600+5"] 1. e4 {[%emt 0:00:00]} c5 {[%emt 0:00:00]} 2. Nf3 {[%emt 0:00:02]} d6 {[%emt 0: 00:02]} 3. Bb5+ {[%emt 0:00:01]} Bd7 {[%emt 0:00:03]} 4. Bxd7+ {[%emt 0:00:02]} Nxd7 {[%emt 0:00:02]} 5. O-O {[%emt 0:00:02]} Ngf6 {[%emt 0:00:07]} 6. Qe2 { [%emt 0:00:02]} e6 {[%emt 0:00:02]} 7. b3 {[%emt 0:00:02]} Be7 {[%emt 0:00:06]} 8. Bb2 {[%emt 0:00:18]} O-O {[%emt 0:00:02]} 9. d4 {[%emt 0:00:03]} Qc7 { [%emt 0:00:33]} 10. c4 {[%emt 0:00:06]} cxd4 {[%emt 0:00:23]} 11. Nxd4 { [%emt 0:00:00]} a6 {[%emt 0:00:02]} 12. Nc3 {[%emt 0:00:06]} Rfe8 {[%emt 0:00: 05]} 13. Rac1 {[%emt 0:00:10]} Rac8 {[%emt 0:00:03]} 14. Rfe1 {[%emt 0:00:42]} Qb8 {[%emt 0:00:54]} 15. Kh1 {[%emt 0:00:08]} Bf8 {[%emt 0:00:50]} 16. Rcd1 { [%emt 0:00:34]} Nc5 {[%emt 0:01:29]} 17. f3 {[%emt 0:00:39]} g6 {[%emt 0:01:15] } 18. Nc2 {[%emt 0:00:05]} Bg7 {[%emt 0:01:23]} 19. Rd2 {[%emt 0:00:11]} Red8 { [%emt 0:00:22]} 20. Ne3 {[%emt 0:00:20]} Ne8 {[%emt 0:00:12]} 21. Red1 { [%emt 0:00:13]} b6 {[%emt 0:00:30]} 22. g3 {[%emt 0:00:29]} Qb7 {[%emt 0:00:03] } 23. Kg2 {[%emt 0:00:04]} Rb8 {[%emt 0:00:07]} 24. b4 {[%emt 0:02:18]} Nd7 { [%emt 0:00:02]} 25. a3 {[%emt 0:00:10]} b5 {[%emt 0:00:15]} 26. Rc2 {[%emt 0: 01:11]} Ne5 {[%emt 0:00:13]} 27. cxb5 {[%emt 0:00:16]} axb5 {[%emt 0:00:03]} 28. Rdc1 {[%emt 0:00:06]} Rdc8 {[%emt 0:00:29]} 29. Nb1 {[%emt 0:00:03]} Rxc2 { [%emt 0:00:07]} 30. Rxc2 {[%emt 0:00:11]} f5 {[%emt 0:00:39]} 31. Nd2 {[%emt 0: 00:05]} Nf6 {[%emt 0:00:24]} 32. exf5 {[%emt 0:00:14]} gxf5 {[%emt 0:00:04]} 33. Bxe5 {[%emt 0:00:23]} dxe5 {[%emt 0:00:00]} 34. Nb3 {[%emt 0:00:05]} Qe7 { [%emt 0:00:43]} 35. Nc5 {[%emt 0:00:09]} Nd5 {[%emt 0:00:14]} 36. Rd2 {[%emt 0: 00:13]} Rd8 {[%emt 0:00:28]} 37. Nxd5 {[%emt 0:00:44]} exd5 {[%emt 0:00:02]} 38. Qxb5 {[%emt 0:00:01]} e4 {[%emt 0:00:06]} 39. Qc6 {[%emt 0:00:24]} e3 { [%emt 0:00:15]} 40. Rxd5 {[%emt 0:00:09]} Re8 {[%emt 0:00:11]} 41. Rd7 { [%emt 0:00:23]} Qe5 {[%emt 0:00:02]} 42. Nd3 {[%emt 0:00:02]} Qc3 {[%emt 0:00: 23]} 43. Rxg7+ {[%emt 0:00:23]} Kxg7 {[%emt 0:00:09]} 44. Qxc3+ {[%emt 0:00:01] } 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "16.6"] [White "Mendonca, Leon Luke"] [Black "Gukesh D"] [Result "0-1"] [ECO "D30"] [WhiteElo "2549"] [BlackElo "2578"] [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"] 1. d4 d5 2. Nf3 Nd7 3. Bf4 Ngf6 4. e3 e6 5. c4 Bb4+ 6. Nbd2 {D30: Queen's Gambit Declined: Systems without Nc3.} c5 $5 {[%mdl 4] [#] An interesting side line.} 7. dxc5 $146 ({Predecessor:} 7. a3 Bxd2+ 8. Qxd2 Ne4 9. Qc2 Qa5+ 10. Nd2 Nxd2 11. Qxd2 Qxd2+ 12. Kxd2 dxc4 13. Bxc4 cxd4 14. exd4 {1/2-1/2 (45) Pechisker,A-Wu,B Nanaimo 1993 EXT 1999 [Bulletin]}) 7... Bxc5 8. Be2 {White has an edge.} O-O 9. O-O b6 10. Nb3 Ba6 11. Rc1 Rc8 12. cxd5 Bxe2 13. Qxe2 { And now dxe6 would win.} Nxd5 14. Bg3 Qe7 15. a3 Rfd8 16. Rfd1 h6 17. Nfd4 Bxd4 18. Nxd4 {aiming for Nc6.} Nc5 $4 ({Black should try} 18... Rxc1 $14 19. Rxc1 Qe8) 19. f3 (19. e4 Nf6 20. b4 Ncxe4 21. Nc6 Rxd1+ 22. Qxd1 $18) 19... Qg5 $11 20. Bf2 a5 21. h4 Qe5 22. Nb5 {[#]} Nf4 $1 {[%mdl 64] Pin} 23. Rxd8+ $1 Rxd8 24. Qf1 $4 {Loses the game.} (24. Qc2 $15 Nfd3 {[%mdl 64] Double Attack} 25. Rd1) 24... Nfd3 $19 {[%mdl 64] Double Attack} 25. Rb1 (25. Rd1 Qxb2 26. Rb1) 25... Nxf2 {[%mdl 64] Overworked Piece. Black is clearly winning.} 26. Qxf2 Nd3 $1 {[%csl Bb5,Bf2][%mdl 64] [#] Discovered Attack} 27. Qe2 Qxb5 28. Rd1 Rd5 29. Kh2 Qxb2 {Weighted Error Value: White=0.58/Black=0.08} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "16.7"] [White "Praggnanandhaa R"] [Black "Yoo, Christopher Woojin"] [Result "1-0"] [ECO "D55"] [WhiteElo "2608"] [BlackElo "2457"] [Annotator "TA"] [PlyCount "47"] [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 17,47,16,15,13,5,-33,14,0,0,0,49,58,60,54,83,44,43,50,114,58,313,320, 556,558,591,588,866,864,849,847,831,797]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 O-O 5. Bg5 d5 6. e3 h6 7. Bh4 Be7 8. Qc2 b6 9. Bxf6 Bxf6 10. cxd5 {D55: Queen's Gambit Declined: 4 Bg5 Be7: Lines without ...h6 and 6...h6 7 Bxf6.} exd5 11. O-O-O {[#]} (11. Be2 {seems wilder.} Bb7 12. O-O c6 13. a3 Na6 14. b4) 11... Bg4 $146 (11... c6 {is interesting.} 12. Ne2 a5 13. Nf4 b5 14. Bd3 Qd6) ( {Predecessor:} 11... Be6 12. Ne5 c5 13. f4 Bxe5 14. dxe5 Nc6 15. a3 d4 16. Qe4 Qc8 17. Bd3 g6 18. Nb5 c4 {1-0 (35) Zauner,C (1960)-Ofner,M (2146) Austria 2016 }) 12. h3 {The position is equal.} Bxf3 13. gxf3 c6 14. Kb1 Qd6 15. h4 Nd7 16. h5 Rfd8 17. Rg1 Qh2 ({Better is} 17... a5 $14) 18. Bd3 (18. Rg3 $16) 18... Qxh5 $4 {[%mdl 8192] [#] Black cannot hold the game after this.} (18... Bh4 $14) 19. f4 $18 Nf8 $2 (19... c5 {is a better defense.} 20. Bf5 cxd4) 20. Rh1 {White is clearly winning.} Qf3 21. Rh2 c5 22. Be2 cxd4 23. Bxf3 dxc3 24. bxc3 {Weighted Error Value: White=0.11/Black=0.92} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "16.8"] [White "Bjerre, Jonas Buhl"] [Black "Saduakassova, Dinara"] [Result "1/2-1/2"] [ECO "C77"] [WhiteElo "2542"] [BlackElo "2500"] [Annotator "TA"] [PlyCount "148"] [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 16,147,22,21,29,20,20,15,29,25,41,35,46,35,42,21,36,30,32,33,22,27,32, 18,33,26,45,39,41,32,34,22,44,39,45,45,41,18,43,20,40,38,64,66,68,60,62,56,99, 92,86,80,66,67,79,69,78,73,76,52,52,52,54,54,57,37,63,10,12,12,16,0,34,29,54, 47,44,45,115,41,65,56,57,60,56,29,50,29,70,36,50,40,70,70,64,52,109,115,116, 121,115,53,62,0,0,0,0,0,0,-28000,-28000,-28000,-28000,-28000,-28000,-28000, -28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000, -28000,-28000,-28000,-28000,-28000,-28000,-28000]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d3 d6 6. O-O g6 7. c3 Bg7 8. Re1 O-O 9. h3 h6 {[#] C77: Ruy Lopez: 3...a6 4 Ba4 Nf6, unusual lines.} 10. a3 $146 ({Predecessor:} 10. Be3 b5 11. Bb3 Na5 12. Bc2 c5 13. a4 Bd7 14. Nbd2 Nh5 15. d4 Qe7 16. d5 c4 17. Nf1 { 0-1 (35) Martinez Alcantara,J (2583)-Firouzja,A (2682) Chess.com INT 2019}) 10... b5 11. Bc2 Bb7 {The position is equal.} 12. Be3 d5 13. Nbd2 Qd6 {next ... d4 is good for Black.} 14. Nb3 {aiming for Bc5.} Nd7 15. Qd2 (15. exd5 { feels hotter.} Qxd5 16. Nbd2 Rfd8 17. b4 Ne7 18. d4) 15... dxe4 16. dxe4 Qxd2 17. Nfxd2 Rfd8 18. a4 Bf8 19. Red1 Nb6 20. Nc5 Bxc5 21. Bxc5 Nxa4 22. Bxa4 bxa4 23. Be3 Kg7 24. Rxa4 a5 25. Rda1 Ba6 26. b4 Rab8 27. bxa5 Rd3 28. R4a3 Rb2 29. Nb3 Rxc3 30. Nc5 {[%mdl 64] [#] Discovered Attack} Rxa3 31. Rxa3 Nb8 32. f4 Rb1+ 33. Kh2 exf4 34. Bxf4 Rb5 35. Rc3 Bc8 $1 36. Bxc7 Na6 37. Bb6 (37. Nxa6 { looks sharper.} Bxa6 38. g4 Kf8 39. Kg3 Ke8 40. Kf3) 37... Nxc5 38. Bxc5 $14 { [%mdl 4096] Endgame KRB-KRB} Ba6 39. Bd4+ Kf8 40. Bb6 Re5 41. Rc7 ({White should play} 41. Rc6 $14 Ke8 42. Bc7) 41... Rxe4 $11 42. Ra7 Bd3 43. a6 Ra4 44. Ra8+ Kg7 45. a7 {Strongly threatening Re8.} Be4 $1 {[%CAl Re4a8]} 46. Re8 { And now Rxe4! would win.} f5 {[#]} ({Black should try} 46... Bc6 $14 47. Rc8 Be4) 47. g4 (47. Re7+ $1 $16 Kg8 48. g4) 47... Kf6 48. gxf5 {Rxe4! is the strong threat.} gxf5 49. Kg3 Ra3+ 50. Kf2 Kg5 51. Rg8+ Kf6 52. Rf8+ Kg5 53. Be3+ Kg6 54. Re8 h5 55. h4 Kf6 (55... Kf7 $14 56. Rh8 f4) 56. Bd4+ $16 Kf7 57. Rh8 Kg6 58. Be3 (58. Rf8 $16) 58... f4 $14 {[%mdl 64] Threatens to win with ... Ra2+. Decoy} 59. Bxf4 (59. Bd4 $14) 59... Rf3+ $11 60. Kg1 {Hoping for Bd6.} Rxf4 61. a8=Q {Intending Qg8+ and mate.} Bxa8 62. Rxa8 Rxh4 {KR-KR. Mate.} 63. Ra5 Rf4 64. Kg2 Rf5 65. Rxf5 Kxf5 {KP-K} 66. Kh3 Kg5 67. Kg3 h4+ 68. Kh3 Kh5 69. Kh2 Kg4 70. Kg2 h3+ 71. Kh2 Kh4 72. Kh1 Kg3 73. Kg1 h2+ 74. Kh1 Kh3 { Weighted Error Value: White=0.12/Black=0.10} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "16.9"] [White "Lei, Tingjie"] [Black "Mammadzada, Gunay"] [Result "0-1"] [ECO "D43"] [WhiteElo "2505"] [BlackElo "2443"] [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 12,66,10,14,21,18,12,14,16,14,25,24,26,35,30,17,41,28,37,29,30,30,41,12, 29,-57,-50,-49,0,-15,24,10,23,11,34,-3,43,34,38,38,57,54,56,32,39,37,139,16, 169,179,281,-595,-591,-29994,-29995,-29996,-29997]} 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Qb3 e6 5. Bg5 Nbd7 6. Nc3 Be7 7. e3 h6 {D43: Semi-Slav: 5 Bg5 h6.} 8. Bh4 O-O 9. Rc1 a6 {The position is equal.} 10. cxd5 exd5 11. Bd3 Ne4 12. Bxe7 Qxe7 {[#]} 13. Bxe4 $146 ({Predecessor:} 13. O-O Ndf6 14. Bxe4 Nxe4 15. Nxe4 dxe4 16. Nd2 Be6 17. Qc3 Bd5 18. Qc5 Qg5 19. Rce1 {1/2-1/2 (70) Buli, V-Mariotti,S (2350) Montecatini Terme 2005}) 13... dxe4 14. Nd2 Nf6 15. Qa3 Qe6 16. O-O Re8 17. Na4 Nd5 18. Nc5 (18. f3 $11) 18... Qg6 $15 {And now ...Bh3! would win.} 19. Kh1 Rb8 20. b4 Bf5 21. Qb3 Nf6 22. Nc4 Be6 23. Qd1 Re7 24. Ne5 Qg5 25. a4 Qh4 26. Nxe6 Rxe6 27. h3 Rd8 {...Rxe5! is the strong threat.} 28. Qb3 h5 ({Black should play} 28... Nd5 $14) 29. f3 (29. b5 $16) 29... Qg5 $2 ( 29... Qg3 $11 {and Black has nothing to worry.} 30. Qb2 Nd7) 30. f4 $1 $18 { [%CAl Rf4g5]} ({Not} 30. fxe4 Rxe5 31. Rxf6 (31. dxe5 $2 Rd2 $19) 31... gxf6 $17) 30... Qg3 {[#]} (30... Qf5 {might work better.} 31. b5 axb5) 31. f5 $4 { [%mdl 8192]} (31. Nxf7 $1 $18 {[%mdl 512] was the only winning move.} Kxf7 32. f5 {[%mdl 64] Pin}) 31... Rxe5 $19 32. dxe5 {[#]} Rd2 $1 {[%csl Gd2][%CAl Rg3g2]} 33. Rg1 {[#]} (33. Rf2 Ng4) 33... Ng4 $1 {[%csl Gg4][%CAl Rg3h2][%mdl 576] Double Attack. Weighted Error Value: White=0.53/Black=0.29} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "16.10"] [White "Abdumalik, Zhansaya"] [Black "Shuvalova, Polina"] [Result "1/2-1/2"] [ECO "B10"] [WhiteElo "2472"] [BlackElo "2489"] [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 9,107,-35,13,15,14,10,36,-14,-12,-29,-38,-35,-38,-36,21,13,0,0,0,-32, -37,-37,-38,-35,0,-25,-39,-24,-18,-8,13,0,10,-4,-3,0,0,-16,-12,-16,-13,-20,-19, -96,-91,-103,-91,-134,-129,-138,-124,-131,-94,-184,-170,-199,0,-15,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,-20,-8,-76,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c6 2. Nf3 d5 3. d3 g6 4. Nc3 Bg7 5. h3 {[#]} Nf6 $146 ({Predecessor:} 5... dxe4 6. Nxe4 Nf6 7. Be2 Nbd7 8. O-O O-O 9. Re1 Nxe4 10. dxe4 Nf6 11. Bd3 h6 {1-0 (31) Kekic,A (2188)-Hartikainen,J (2142) Chess.com INT 2021}) 6. e5 { B10: Caro-Kann: 2 d3 and 2 c4.} Nfd7 7. d4 O-O 8. Be2 {White is slightly better.} (8. h4 $5 {[%CAl Rh4h5]}) 8... c5 9. Nxd5 cxd4 10. Nxd4 Nxe5 11. Nb5 Na6 (11... Nbc6 $15) 12. Bg5 Nc6 13. c3 Be6 14. Ndc7 Nxc7 15. Qxd8 Raxd8 16. Nxc7 Bc8 17. Nb5 a6 {[#] And now ...Rd5 would win.} 18. Na3 $1 h6 19. Be3 e5 20. O-O e4 21. Rfd1 b5 22. Nc2 Be6 23. Bb6 Rxd1+ 24. Rxd1 Rb8 25. Bc5 Bxa2 26. Ne3 (26. Ra1 $11 Bc4 27. Rxa6 Bxe2 28. Rxc6) 26... Be6 $17 27. Nd5 a5 28. f3 exf3 29. Bxf3 Ne5 30. Be2 Kh7 31. Bd6 (31. Nb6 $17) 31... Rd8 $19 32. Bxb5 Kh8 $2 (32... Rxd6 $19 33. Nf6+ {[%mdl 64] Discovered Attack} Bxf6 34. Rxd6 Bg5) 33. Ne3 (33. Nb6 {feels hotter.} Kg8 34. c4 f5 35. c5 Bf8 36. Kf2) 33... f5 34. Bc7 Rxd1+ 35. Nxd1 Bb3 36. Nf2 a4 37. Nd3 Nxd3 38. Bxd3 $11 {[%mdl 4096] Endgame KBB-KBB} Kg8 39. Kf2 Kf7 40. Ke2 Ke6 41. Kd2 g5 42. Bc2 {[#]} (42. Be2 $11 {keeps the balance.}) 42... Bd5 (42... Bxc2 $1 $17 43. Kxc2 f4) 43. g4 { The position is equal.} fxg4 44. hxg4 Bf3 45. Bxa4 {Black should prevent Bd1.} Bxg4 46. Bc6 Be5 47. Bxe5 Kxe5 {KB-KB} 48. Ke3 Be6 49. b4 h5 50. b5 Kd6 51. Kd4 h4 52. c4 Bd7 53. Bxd7 Kxd7 54. Ke3 {Weighted Error Value: White=0.15/Black=0. 13} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "17.1"] [White "Shuvalova, Polina"] [Black "Keymer, Vincent"] [Result "1/2-1/2"] [ECO "B92"] [WhiteElo "2489"] [BlackElo "2591"] [Annotator "TA"] [PlyCount "171"] [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 17,171,0,0,0,26,0,-5,-16,-3,-23,-17,-20,-28,-34,-4,-35,-31,-34,-12,-45, -41,-43,-41,-47,-31,-52,-56,-48,-38,-42,-29,-16,-18,-10,0,0,0,0,0,0,4,0,0,0,26, 26,29,27,28,26,27,20,65,29,41,25,30,27,52,29,43,38,43,29,29,29,58,0,29,28,31, 10,16,16,29,33,22,0,0,0,49,-39,37,0,12,6,30,-33,21,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. O-O O-O 9. Qd3 Be6 10. Bd2 {B92: Sicilian Najdorf: 6 Be2.} Re8 11. Nd5 Nxd5 12. exd5 Bc8 {[#]} 13. c4 $146 ({Predecessor:} 13. a4 a5 14. f4 Nd7 15. Qe3 exf4 16. Qxf4 Ne5 17. Bb5 Rf8 18. Rae1 Bf6 19. Nd4 { 1/2-1/2 (50) Vachier Lagrave,M (2758)-Giri,A (2776) chess24.com INT 2021}) 13... a5 {[%CAl Ba6a5,Ba5a4][%mdl 32]} 14. Bc3 Nd7 15. Rae1 Bf6 16. Kh1 g6 17. Qc2 Bg7 18. Bd1 a4 19. Nd2 Nc5 20. f3 Bd7 21. b4 axb3 $1 22. axb3 b5 23. Ne4 Qb6 24. Qf2 Qc7 {[#] Strongly threatening ...Nd3.} 25. Nxc5 dxc5 26. Bc2 Ra2 27. Re2 b4 28. Be1 Rea8 29. Qe3 Rb2 30. Be4 Raa2 31. Rxb2 Rxb2 32. Rf2 Rxf2 33. Bxf2 Bf8 34. g4 Qa5 35. Kg2 f6 36. Qd2 {aiming for d6.} Qa6 37. Qc2 Be8 38. Qb2 Bd6 39. Be3 Bd7 40. Qf2 Qa5 41. Qc2 Kg7 42. Qf2 (42. h4 $14) 42... Qc7 43. Qa2 Bc8 44. h3 f5 45. Bc2 Kf6 46. Qa8 Kf7 47. Bb1 h5 {[%CAl Rf5g4]} 48. Bc2 Kg7 { [%CAl Rf5g4]} 49. Bb1 (49. gxf5 $14 Bxf5 50. Bxf5 gxf5 51. Bg5) 49... Kf6 ({ Black should try} 49... hxg4 $15 50. hxg4 fxg4) 50. Bc2 hxg4 51. hxg4 Kf7 52. Bb1 ({White should play} 52. Qa1 $11) 52... Kg7 (52... fxg4 $15 53. Qc6 Qd7 54. Qxd7+ Bxd7) 53. Bc2 {The position is equal.} fxg4 54. fxg4 Bxg4 55. Qe8 Bf5 56. Bxf5 gxf5 57. Bg5 {Threatens to win with Qe6.} Qf7 58. Qd8 Qg6 59. Kf2 f4 60. Qd7+ Kg8 61. Qd8+ Bf8 62. Be7 Qg3+ {[%mdl 64] [#] Double Attack} 63. Kf1 Qf3+ 64. Kg1 Qd1+ 65. Kf2 Qd2+ 66. Kf1 Qd3+ 67. Kf2 Qg3+ 68. Kf1 Qh3+ 69. Kg1 Qh6 { And now ...Qg7+ would win.} 70. Bxc5 Qg6+ 71. Kf1 Qb1+ 72. Kf2 Qc2+ 73. Kf1 Qd1+ 74. Kf2 Qd2+ 75. Kf1 Qd3+ 76. Kg1 Qg3+ 77. Kf1 Qf3+ 78. Kg1 Qd1+ 79. Kh2 Qe2+ 80. Kg1 Qd1+ 81. Kh2 Qh5+ 82. Kg1 Qg6+ 83. Kf1 Qb1+ 84. Kf2 Qc2+ 85. Kf1 Qd3+ 86. Kg1 {Weighted Error Value: White=0.14/Black=0.12} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "17.2"] [White "Mammadzada, Gunay"] [Black "Abdumalik, Zhansaya"] [Result "0-1"] [ECO "B33"] [WhiteElo "2443"] [BlackElo "2472"] [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 24,126,54,36,54,39,45,44,57,16,33,16,125,18,79,61,70,104,90,79,108,26, 92,68,70,10,9,10,9,12,14,9,7,8,52,52,63,0,0,0,0,0,0,0,0,-8,-10,-16,-22,-22,46, 49,152,147,147,145,145,147,161,149,136,30,27,27,27,14,18,17,19,20,19,8,8,0,11, 8,15,8,8,8,8,8,20,16,30,8,8,8,30,0,0,-6539,-6531,-6524,-203,-29978,-29979, -29981,-29982,-29984,-29985,-29986,-29987,-29987,-29988]} 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Nd5 Be7 10. Bxf6 Bxf6 11. c3 Ne7 {11...Bg5 is setting a new trend.} 12. Nxf6+ gxf6 13. Bd3 Rg8 {B33: Sicilian: Pelikan and Sveshnikov Variations.} 14. g3 {[#]} Bg4 $146 ( {Predecessor:} 14... Bb7 15. Qe2 f5 16. O-O-O Qb6 17. Rhe1 fxe4 18. Bxe4 O-O-O 19. Bxb7+ Qxb7 20. f4 f6 21. Nc2 {1-0 (59) Gabrielian,A (2529)-Ajrapetjan,Y (2403) Alushta 2006}) 15. f3 Be6 {White is slightly better.} 16. Qe2 Qb6 17. Nc2 f5 (17... h5 $11) 18. Ne3 (18. exf5 $1 $16 Nxf5 19. f4) 18... fxe4 (18... f4 $11 19. gxf4 exf4) 19. Bxe4 $16 Rc8 20. Bxh7 Rh8 21. Bd3 f5 22. Qf2 (22. O-O-O $16) 22... Kf7 (22... b4 $1 $11 {remains equal.}) 23. a3 a5 24. Rd1 ({ White should try} 24. h4 $14) 24... b4 $1 $11 {[%CAl Rb4c3]} 25. axb4 axb4 26. c4 f4 27. gxf4 exf4 28. Ng4 Qxf2+ (28... Qc5 {looks sharper.} 29. Qxc5 Rxc5 30. b3 Ra5 31. Rf1 Rh4) 29. Kxf2 Bxc4 30. Be4 (30. Bb1 $1 $14) 30... d5 31. Bb1 Nc6 32. h4 Rce8 33. Rd2 Rh5 34. Bc2 b3 35. Bd3 Nb4 36. Bf1 Reh8 (36... Bxf1 $11 37. Rxf1 Rc8) 37. Rd4 $1 $14 {[%csl Bc4,Bf4][%mdl 64] Double Attack} Rf5 (37... Rxh4 $14 38. Rxf4+ Ke6 39. Rxh4 Rxh4) 38. Bxc4 $16 dxc4 39. Rxc4 Nd3+ 40. Kg2 $1 Nxb2 41. Rc7+ Ke6 42. Rb1 (42. Rb7 $16) 42... Kd6 43. Rc3 Na4 44. Rd3+ Kc6 { White must now prevent ...Nc5.} 45. Rdxb3 Rxh4 46. Rb4 Nc5 47. Rb6+ (47. Rc4 { keeps more tension.} Rh7 48. Rbb4 Rhf7 49. Rd4 Rf8 50. Rbc4) 47... Kc7 48. R6b4 (48. R6b2 {with more complications.} Rh8 49. Rc1 Rb8 50. Rbc2 Kc6 51. Rd1) 48... Rh7 49. Rc1 Rd7 50. Rb2 Rdd5 51. Rbc2 Kd6 52. Rh1 Rf7 53. Rh6+ Kc7 54. Rf6 Rxf6 55. Nxf6 $11 {[%mdl 4096] Endgame KRN-KRN} Rg5+ (55... Rf5 {seems wilder.} 56. Ne4 Kb6 57. Rd2 Re5 58. Rd6+ Kb5) 56. Kf2 {Hoping for Ne4.} Kd6 57. Rxc5 $2 {[%mdl 8192]} Rxc5 {KR-KN} 58. Ne4+ Kd5 59. Nxc5 (59. Nf6+ $19 Ke6 60. Ng4) 59... Kxc5 {Black mates.} 60. Kg2 Kd4 61. Kh3 {[#]} Kd3 $1 62. Kh4 { [#]} Ke2 $1 63. Kg4 Ke3 {Quite a comeback for Black. Weighted Error Value: White=0.41/Black=0.18} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "17.3"] [White "Saduakassova, Dinara"] [Black "Lei, Tingjie"] [Result "0-1"] [ECO "E11"] [WhiteElo "2500"] [BlackElo "2505"] [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 12,144,23,17,24,0,0,0,11,0,0,0,0,0,2,-10,-17,-36,-24,-43,-36,-46,-38, -46,-35,-38,-33,-38,-25,-29,-39,-41,0,0,0,-25,-8,-14,0,0,-7,-135,-114,-138, -143,-134,-150,-145,-89,-188,-170,-320,-321,-318,-100,-100,-100,-100,-100,-284, -172,-310,-238,-393,-376,-434,-422,-441,-419,-423,-404,-411,-409,-390,-388, -369,-312,-312,-312,-843,-804,-868,-708,-1004,-994,-996,-804,-845,-845,-789, -799,-793,-712,-569,-193,-193,-186,-186,-186,-333,-356,-356,-356,-356,-362, -354,-353,-346,-343,-2694,-978,-1102,-23,-31,0,-6095,-6095,-6571,-5506,-2770, -1113,-2557,-1113,-29957,-1113,-1113,-1113,-764,-390,-29970,-29959,-6572,-6572, -2491,-1931]} 1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. g3 Bb4+ 5. Bd2 a5 6. Bg2 O-O 7. O-O {7.Qc2 deserves study.} dxc4 {E11: Bogo-Indian.} 8. Qc2 Bxd2 9. Nbxd2 b5 $1 {The position is equal.} 10. a4 c6 11. b3 cxb3 12. Nxb3 Ba6 13. Rfc1 bxa4 14. Rxa4 Bb5 15. Ra2 {[#]} Nd5 $146 {...Nb4 is the strong threat.} ({Predecessor:} 15... Nbd7 16. e3 Qb6 17. Nfd2 a4 18. Nc5 Nxc5 19. Qxc5 Qxc5 20. Rxc5 Ra6 21. Nb1 Nd5 {0-1 (54) Farmani Anosheh,Y (2187)-Lagunow,R (2422) Schwaebisch Gmuend 2020}) 16. Qd2 a4 $1 17. Nc5 Na6 18. Ne5 Nxc5 19. Rxc5 Qd6 20. e4 Ne7 21. Nc4 Qb8 22. Na3 Rd8 23. Qc3 Ba6 24. Rb2 Qd6 25. Rb4 Be2 26. f4 (26. Qc2 $11 { keeps the balance.} Bh5 27. f4 (27. Rxa4 Rxa4 28. Qxa4 Be2 $11)) 26... Bd1 $1 $17 27. e5 Qd7 28. Bxc6 Nxc6 29. Rxc6 Rdc8 ({Better is} 29... Rac8 30. Rbc4 Rxc6 31. Rxc6 Qb7) 30. Rxc8+ (30. Rbc4 $17 {was necessary.} Rxc6 31. Rxc6) 30... Rxc8 $19 31. Rc4 (31. Qd3 {was worth a try.} Bb3 32. Qb5) 31... Rxc4 32. Nxc4 Bb3 $2 (32... Qc8 $19 {has better winning chances.} 33. Qb2 h6) 33. Nd6 $17 h6 34. Qc5 Bd5 35. f5 $2 (35. h3 $17) 35... Ba8 36. f6 (36. fxe6 $142 Qxe6 37. Qb5) 36... gxf6 $19 37. exf6 $2 (37. Kf2) 37... Qc6 38. Qxc6 Bxc6 {[%mdl 4096] Endgame KB-KN} 39. Nc4 Bd5 40. Na3 Kh7 41. Kf2 Kg6 42. Ke3 Kxf6 43. Kf4 Bb3 44. g4 Ke7 45. h4 $2 (45. g5) 45... f6 46. Ke4 Kd6 47. Nb5+ Kc6 48. Na3 Kb6 49. Kd3 Bd1 50. Nc4+ Kb5 51. Ne3 Bf3 52. Kc3 Ka5 $2 (52... Bd5 {Hoping for ... a3.} 53. Nc2 Be4) 53. Nc4+ Ka6 $1 54. Kb4 Bxg4 55. Kxa4 {[#]} (55. Nb2 { is the only way for White.}) 55... Kb7 $1 56. Ne3 Bf3 57. Kb5 Kc7 58. Kc5 Kd7 59. Nc4 Ke7 60. Nd2 (60. Nb2 Be2 61. d5) 60... Bg2 (60... Bd5 $142 61. Nf1 f5) 61. Nc4 {[#]} f5 $2 (61... Be4 $1 $19 {aiming for ...f5.} 62. Ne3 f5) 62. Ne5 $11 Kf6 {Threatens to win with ...f4.} 63. Kc4 $2 {[%mdl 8192]} (63. Kd6 $11) 63... f4 $19 64. Kd3 Kf5 65. Ke2 Bd5 66. Kf2 h5 (66... Ke4 $142 67. Ng4 h5 68. Nf6+ Kxd4 69. Nxh5 Ke5) 67. Nd7 Bb3 (67... Kg4 $142 68. Nc5 Kxh4 69. Nd7 Kg4 70. Ne5+ Kf5 71. Nf7 Ke4 72. Nd6+ Kxd4 73. Nf7 h4 74. Ng5 e5 75. Nh3 f3 76. Kf1 e4 77. Nf2 e3 78. Nh1 h3 79. Ng3 h2 80. Ke1 f2+ 81. Ke2 h1=Q 82. Nxh1 Bxh1 83. Kf1 Be4 84. Ke2 Bf5 85. Kf3 f1=Q+ 86. Kg3 Qf2#) 68. Kf3 Bd1+ 69. Kf2 Ke4 70. Nf8 $2 (70. Nc5+ $19 Kxd4 71. Nxe6+ Ke5 72. Ng7) 70... Bg4 71. Ng6 f3 72. Ne5 Kxd4 {Weighted Error Value: White=0.55/Black=0.26} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "17.4"] [White "Yoo, Christopher Woojin"] [Black "Bjerre, Jonas Buhl"] [Result "0-1"] [ECO "B94"] [WhiteElo "2457"] [BlackElo "2542"] [Annotator "TA"] [PlyCount "80"] [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 11,80,8,28,29,23,4,10,14,21,-26,48,-14,0,0,16,0,-17,-209,-208,-210,-210, -331,-202,-205,-208,-208,-208,-213,-208,-206,-159,-187,-219,-222,-217,-218, -215,-222,-205,-197,-190,-182,-204,-214,-191,-249,-240,-487,-476,-507,-457, -443,-445,-436,-425,-916,-929,-914,-888,-842,-862,-793,-764,-985,-585,-580, -568,-566,-557,-633,-616]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 Nbd7 7. Qe2 {7.Qe2 is the recent fashion. B94: Sicilian Najdorf: 6 Bg5 Nbd7.} b5 8. O-O-O Bb7 9. f4 {The position is equal.} Rc8 10. Nd5 {[#]} Qa5 $5 $146 {[%mdl 8] New and interesting.} (10... Nxd5 $11 11. exd5 Nb6) ({ Predecessor:} 10... e6 11. Nxf6+ gxf6 12. Bh4 Qa5 13. Kb1 Be7 14. g3 Nc5 15. Nb3 Qb6 16. Nxc5 Rxc5 {1-0 (46) Hacker,J (2297)-Tran,T (2224) Germany 2017}) 11. a3 (11. Bxf6 $14 Nxf6 12. a3) 11... e6 12. Bxf6 gxf6 13. Nb4 Nc5 {[%CAl Bd7c5,Bc5e4,Be4d2][%mdl 32]} 14. e5 {[#] This costs White the game.} (14. Qh5 $11 {and White is okay.}) 14... dxe5 $1 $19 15. fxe5 {[#]} Ne4 16. Nbc6 (16. Ndc6 $142 Bh6+ 17. Kb1 Bxc6 18. Nxc6 Nd2+ 19. Rxd2 Qxd2 20. Qf3) 16... Bxc6 17. Nxc6 Bh6+ 18. Kb1 Nd2+ 19. Rxd2 Qxd2 20. Qf3 Qf4 {Threatens to win with ... Qxf3.} 21. Qxf4 Bxf4 22. Nb4 fxe5 ({But not} 22... Bxe5 23. Nxa6 Ke7 24. Bxb5 $17) 23. Nxa6 Ke7 24. Bxb5 Rhd8 25. Nb4 Rd2 26. g3 Bh6 27. a4 e4 28. a5 (28. c3 {keeps fighting.}) 28... Kd6 29. c3 $2 (29. Re1) 29... Rc5 {Black is clearly winning.} 30. c4 e3 31. Re1 {White hopes to continue with Nc2.} e2 {...Rd1+ is the strong threat.} 32. Ka2 Bg7 33. Ka3 (33. Nd3 $142 Rxd3 34. Rxe2) 33... Bxb2+ 34. Kb3 Bd4 35. a6 Rb2+ 36. Ka3 Bc3 37. Nd3 Bxe1 38. Kxb2 {[#]} Bf2 { [%mdl 512]} 39. a7 {[#]} Rc8 40. Ba6 (40. c5+ Kc7) 40... Ra8 {Weighted Error Value: White=0.52/Black=0.31} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "17.5"] [White "Gukesh D"] [Black "Praggnanandhaa R"] [Result "1-0"] [ECO "D24"] [WhiteElo "2578"] [BlackElo "2608"] [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 9,115,19,36,41,45,44,43,36,42,29,50,0,14,0,25,0,0,-11,7,-14,31,14,65,48, 84,72,93,74,127,106,128,107,117,116,129,129,115,88,133,87,75,98,80,79,90,100, 180,183,204,216,221,221,218,222,218,212,210,210,210,210,208,185,192,0,205,167, 152,72,213,232,380,299,257,264,568,626,627,627,581,574,653,648,675,665,817,360, 637,597,769,752,907,885,1618,820,5892,4975,4929,4929,29956,29956,29978,29979, 29979,29980,29979,29980,29989,29990]} 1. d4 Nf6 2. Nf3 d5 3. c4 e6 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 scores better than 8...Be7.} 9. Be3 Be7 {[#]} 10. h4 $5 $146 {[%mdl 8] New and interesting.} ({Predecessor:} 10. a3 Rb8 11. Qc2 Na5 12. Rd1 Nd5 13. Nc3 Qd7 14. Bd2 Nb3 15. Bxc4 Nxd2 16. Qxd2 {1-0 (52) Sarana,A (2649)-Bluebaum,M (2670) Chess.com INT 2021}) 10... Nb4 11. Nc3 N4d5 12. Bd2 (12. Qc2 {looks sharper.} h6 13. Ne4 Bb7 14. Nc5 Nb4 15. Qc1) 12... Nxc3 13. bxc3 Bb7 14. h5 h6 15. Rh3 Qd7 (15... Rc8 $11) 16. Rg3 $14 Bf8 $6 (16... g5 17. hxg6 fxg6 18. a4 (18. Rxg6 O-O-O) 18... a5) 17. Be3 Bd5 18. a4 a5 (18... Nc8 $142) 19. Nd2 $16 Rb8 20. Rb1 Ra8 21. Ra1 Qc6 22. Kf1 Nc8 23. Qb1 Nb6 24. Ra2 Nxa4 25. Qa1 Nb6 26. Rxa5 Rxa5 27. Qxa5 Qa4 {[#]} (27... Kd7 $16) 28. Nxc4 $1 $18 {[%mdl 512]} Bxc4 {[%CAl Ra4d1]} (28... Qc2 29. Qb5+) 29. Qxa4+ {[%mdl 64] Overworked Piece} Nxa4 30. Bxc4 {And now Bb5+ would win.} Nxc3 31. Bc1 Nd5 32. Rb3 Nb6 33. Bb5+ Kd8 34. Rf3 Ke7 35. Rc3 Kd8 36. Rf3 Ke7 37. Bf4 Nd5 38. Bg3 (38. Bd2 $142) 38... f5 {A mistake that costs the game.} ( 38... g5 $16 {might work better.}) 39. Ra3 Nb6 (39... Kf7 {is a better defense. } 40. Ra8 g5 41. hxg6+ Kxg6) 40. Bh4+ Kf7 41. Ra7 Be7 $4 {[#]} (41... Nd5 42. Bc6 Be7) 42. Bxe7 Nc8 43. Bc5 Nxa7 44. Bxa7 Ra8 45. Bc5 Ra1+ 46. Ke2 Rh1 47. Bc4 (47. Bd7 $142 {Strongly threatening d5!} c6 48. Bxc6) 47... c6 (47... Rc1) 48. Ba6 Rxh5 49. Bb7 Rh1 50. Bxc6 Rc1 51. Kd2 Rf1 52. d5 Ra1 53. d6 Ra2+ 54. Kc3 {White mates.} Ra5 55. Kb4 Ra1 56. d7 Rb1+ 57. Ka5 Rd1 58. Bd6 {Weighted Error Value: White=0.25/Black=0.50} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "17.6"] [White "Badelka, Olga"] [Black "Mendonca, Leon Luke"] [Result "1/2-1/2"] [ECO "E21"] [WhiteElo "2418"] [BlackElo "2549"] [Annotator "TA"] [PlyCount "88"] [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 19,88,15,26,26,35,21,51,47,39,46,59,27,45,40,41,8,30,12,5,-13,23,28,40, 12,25,7,14,0,23,0,10,7,21,0,0,0,9,0,0,0,0,0,30,31,22,0,15,4,55,46,60,0,0,0,45, 0,0,0,0,0,43,0,0,0,62,0,12,0,113,0,22]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 b6 6. Bd3 Bb7 7. Nf3 d6 8. O-O Nbd7 9. a3 Bxc3 10. Bxc3 Ne4 11. Be1 { E21: Nimzo-Indian: 4 Nf3.} Qe7 12. Nd2 Nef6 {[#]} 13. f3 $146 {White is slightly better.} ({Predecessor:} 13. Qc2 a5 14. f3 h6 15. Bh4 c5 16. Rae1 Rfc8 17. Qd1 Qf8 18. Ne4 Ne8 19. a4 cxd4 20. exd4 {1/2-1/2 (48) Pena Riasco, A-Garcia Roman,D (2353) Mislata 2004}) 13... c5 14. Bh4 Rfd8 15. Qe2 Nf8 16. Rac1 Ng6 17. Bf2 (17. Bxg6 $5 hxg6 18. Rfe1 $11) 17... Rac8 18. Bxg6 hxg6 19. e4 e5 20. d5 Nh5 21. g3 Rb8 22. Be3 Bc8 23. b4 Bd7 24. Rb1 a5 25. bxa5 bxa5 26. Rxb8 Rxb8 27. Rb1 Qd8 28. Qd1 f5 29. Rxb8 Qxb8 30. Qb3 Qc7 31. Bg5 Kf7 32. Nb1 (32. Qb2 {is more complex.} Nf6 33. h4 Nh5 34. Kg2 Nf6 35. exf5 gxf5 36. Nb1) 32... Nf6 33. Nc3 Nh7 (33... fxe4 $11 34. Bxf6 (34. fxe4 Kg8 $11) (34. Nxe4 Nxe4 35. fxe4 a4 $11) 34... gxf6) 34. Bd2 $14 Nf6 35. Kf2 (35. exf5 $1 $14 gxf5 36. a4) 35... fxe4 $11 36. fxe4 Ng4+ 37. Kg1 Nf6 38. Bg5 Qa7 39. a4 Qc7 40. Bd2 Ke7 41. Bg5 ({Better is} 41. Kg2 $11) 41... Kf7 $14 42. Bd2 Ke7 43. Bg5 Qa7 { [#]} (43... Kf7 $11 {keeps the balance.}) 44. Bd2 (44. Kg2 $1 $16) 44... Qc7 { Weighted Error Value: White=0.19/Black=0.17} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "17.7"] [White "Salimova, Nurgyul"] [Black "Zhu, Jiner"] [Result "0-1"] [ECO "D13"] [WhiteElo "2395"] [BlackElo "2462"] [Annotator "TA"] [PlyCount "76"] [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 21,76,0,0,0,0,-9,2,-24,-22,-28,-26,-25,-21,-25,-18,-25,-19,-18,-13,-27, 0,0,0,0,46,-77,-77,-82,-84,-89,-75,-79,-68,-108,-104,-95,-95,-85,-18,-177,-94, -139,-140,-185,-185,-176,-176,-587,-573,-722,-713,-866,-673,-2480,-1222,-29992, -924]} 1. d4 Nf6 2. Nf3 e6 3. c4 d5 4. g3 Bb4+ 5. Bd2 Be7 6. Bg2 O-O 7. O-O c6 8. Bf4 b6 9. cxd5 cxd5 10. Nc3 Nc6 11. Rc1 Bb7 12. Qd3 {D13: Slav Defence: Exchange variation without ...Bf5.} Rc8 13. Rfd1 {[#]} a6 $146 ({Predecessor:} 13... Nh5 14. Bd2 Bd6 15. Bg5 Qd7 16. e4 dxe4 17. Nxe4 Nb4 18. Qb1 h6 19. Nxd6 Qxd6 {1/2-1/2 (69) Strutinskaya,G (2214)-Hejazipour,M (2277) Moscow 2019}) 14. Ne5 {The position is equal.} b5 15. Nxc6 Bxc6 16. Nb1 Qb6 17. Nd2 b4 18. Nb3 Bb5 19. Qe3 Rfe8 20. Bf3 Nd7 21. Rxc8 $1 Rxc8 22. Bxd5 Rc2 23. Rd2 Rxd2 $17 24. Nxd2 Bf6 25. Bb3 Bxd4 26. Qf3 Bc6 27. e4 Qc5 $36 {[%mdl 2048] Black is really pushing.} ({Don't play} 27... Bxb2 28. Nc4 $15) 28. Nc4 Nf6 29. Bd6 Qa7 (29... Qb5 $1 $17 30. Qd1 e5) 30. Nd2 (30. Bxb4 $11 {and White stays safe.} Bxe4 31. Qf4) 30... Qb7 (30... Bxb2 31. Bxb4 Qb7 32. a3 $17) ({Black should play} 30... a5 $19 31. Bc2 Bxb2) 31. Bc2 Bxb2 32. Nc4 Bc3 ({But not} 32... Nxe4 33. Na5 $17 ) 33. Na5 Bxe4 34. Qe3 (34. Qxc3 bxc3 35. Nxb7 Bxc2 36. Kf1) 34... Qd5 $19 { White must now prevent ...Bh1.} 35. Bxe4 Nxe4 36. Qa7 h6 37. Qb8+ Kh7 {( -> ... Qd1+)} 38. Bxb4 Qd4 {Weighted Error Value: White=0.96/Black=0.11} (38... Qd1+ $142 39. Kg2 {[#]} Nd2 $1 40. Qg8+ Kxg8 41. Kh3 h5 $1 42. Nc4 Qf1+ {[%mdl 64] Double Attack} 43. Kh4 Nf3+ 44. Kxh5 Qh3#) 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "17.8"] [White "Liang, Awonder"] [Black "Nihal Sarin"] [Result "0-1"] [ECO "C79"] [WhiteElo "2592"] [BlackElo "2620"] [Annotator "TA"] [PlyCount "84"] [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 17,84,46,55,60,61,45,41,12,18,-28,-13,0,-10,-29,0,-25,35,31,30,-18,12, 10,18,-15,0,0,0,0,0,0,12,-57,-10,-20,-30,-55,-40,-85,-39,-49,0,0,0,0,0,-131, -139,-155,-124,-124,-120,-121,-123,-114,-109,-149,-155,-117,-144,-138,0,0,-12, -704,-16,-883,-878,-975,-975]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O d6 6. Re1 b5 7. Bb3 Na5 8. d4 Nxb3 9. axb3 Bb7 10. dxe5 {C79: Ruy Lopez: Steinitz-type lines with 3...a6 4 Ba4 Nf6 5 0-0 d6.} Nxe4 11. Nc3 d5 {[#]} 12. Qe2 $146 {[%CAl Rc3e4] White is slightly better.} ({Predecessor:} 12. Nd4 Bc5 13. Be3 Bxd4 14. Bxd4 Qe7 15. f3 Nxc3 16. bxc3 c5 17. Bf2 Rc8 18. Qd2 {1/2-1/2 (50) Yarmolyuk,Y (2335)-Babychuk,V (2216) ICCF email 2016}) 12... Bb4 13. Bd2 Nxd2 14. Qxd2 O-O 15. Re2 Qd7 16. Rd1 Rad8 ({Black should play} 16... Rfe8 $11) 17. Qf4 $14 Be7 18. Red2 Qe6 19. Nd4 Qg6 20. h4 (20. Rd3 $5 {[%CAl Rd3g3]} h6 21. b4 $11) 20... Rfe8 21. Rd3 {Threatens to win with Rg3.} Bc8 22. h5 Qxh5 23. Nc6 Bg5 24. Qg3 (24. Qd4 $11) 24... Rd7 25. Nxd5 Bb7 26. Na5 Bxd5 27. Rxd5 Rxd5 28. Rxd5 h6 29. f4 Be7 30. Nc6 Bf8 31. Rd7 $2 (31. Qf3 $11 {remains equal.} Qf5 32. Nd4) 31... Bc5+ $17 32. Kf1 Re6 (32... Qh1+ 33. Ke2 Re6) 33. Nd4 Rg6 34. Qf3 Qh1+ 35. Kf2 Qc1 $40 {[%mdl 128] And now ...Qd2+ would win. Black is out for blood.} 36. Qe4 Qd2+ 37. Kf1 Qd1+ $1 38. Kf2 {[#]} Qg4 (38... Rxg2+ $1 $17 {[%mdl 512]} 39. Qxg2 (39. Kxg2 Qg4+) 39... Bxd4+ 40. Kg3 {[#]} Bf2+ $1 { [%mdl 64] Discovered Attack} 41. Kxf2 Qxd7) 39. Rd8+ $11 Kh7 {aiming for ... Qh4+.} 40. c3 $4 {[%mdl 8192]} (40. Rd5 $11 Bb6 41. b4) 40... b4 $2 (40... Qh4+ $19 41. Ke2 Qxd8) 41. Qf3 $2 {[%mdl 8192]} (41. Kg1 $11) 41... Qh4+ $19 { [%mdl 64] Double Attack} 42. Kf1 Qxd8 {Weighted Error Value: White=0.63/ Black=0.33} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "17.9"] [White "Khademalsharieh, Sarasadat"] [Black "Yip, Carissa"] [Result "1-0"] [ECO "A13"] [WhiteElo "2494"] [BlackElo "2430"] [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 16,89,13,13,39,26,47,42,45,30,38,-21,-18,-18,-8,-21,-13,-31,-32,-76,-74, -145,-48,-61,-60,-63,112,101,143,129,129,148,152,132,171,115,158,164,250,241, 270,115,114,117,104,85,92,78,78,81,62,70,75,67,79,72,78,12,155,147,175,154,203, 208,208,204,266,262,270,263,529,518,485,484,1078,678]} 1. d4 g6 2. c4 Bg7 3. g3 e6 4. Nf3 Ne7 5. Bg2 d5 6. cxd5 exd5 7. O-O O-O 8. Nc3 Nbc6 9. Bf4 a6 {[#] A13: English Opening: 1...e6.} 10. h4 $146 ({Predecessor:} 10. Qd2 Nf5 11. e3 Nce7 12. Rfd1 Nd6 13. Ne1 c6 14. Bxd6 Qxd6 15. Nd3 h5 16. Nf4 Bg4 17. f3 {0-1 (34) Badelka,O (2427)-Ipatov,A (2644) Lichess.org INT 2020}) 10... Nf5 {[%CAl Rc6d4] } 11. e3 Nce7 {White is slightly better.} 12. Be5 Bh6 13. Bf4 (13. g4 $14 f6 14. Bh2 (14. gxf5 fxe5 15. dxe5 Bxf5 $11)) 13... Bxf4 $11 14. exf4 c6 15. Qd2 Nd6 16. Ne5 Nef5 17. Ne2 Qb6 18. Rad1 (18. Rab1 $142) 18... Be6 (18... f6 $17 19. Nd3 Nxd4 20. Nxd4 Qxd4) 19. b3 Rae8 20. Nc3 Qa5 $2 {[#]} (20... f6 $15 21. Na4 Qc7) 21. Nxd5 $1 $16 {[%mdl 576] Discovered Attack} Qxd2 (21... Qd8 22. Nc3 ) 22. Nf6+ {[%mdl 64] Double Attack} Kh8 23. Rxd2 Rd8 24. d5 cxd5 25. Nxd5 ({ Better is} 25. Rfd1 $18) 25... Nb5 {With the idea ...Nc3.} 26. Rfd1 Rc8 (26... f6 $142) 27. Nb6 $18 Rc7 28. Rd8 (28. Bd5 $1 $18 {and the rest is easy.}) 28... Kg7 29. Rxf8 Kxf8 30. Rd8+ Ke7 31. Rb8 Nfd6 32. Bd5 Rc1+ 33. Kg2 Bxd5+ 34. Nxd5+ Ke6 35. Nb6 Rc2 36. a4 ({White should try} 36. Nf3 $1 $16 {Threatens to win with a4.} Rxa2 37. Ng5+ Kf6 38. Rh8) 36... Nd4 {[#]} (36... Nc3 $1 $11 { keeps the balance.}) 37. Nbc4 $1 $16 {[%CAl Rc4d6]} Nxc4 38. bxc4 {[%mdl 4096] Endgame KRN-KRN} f6 {[#]} 39. Nd3 Rxc4 40. Rxb7 h5 41. Rb6+ Kf5 42. Rxa6 Rc2 $2 (42... Nc6 43. Nb2 Rc5) 43. Nb4 $18 {White is clearly winning.} Rc5 44. Rd6 Nb3 (44... Ke4 $142 45. Rxf6 Ra5) 45. Nd5 {Weighted Error Value: White=0.18/ Black=0.36} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "17.10"] [White "Murzin, Volodar"] [Black "Abdusattorov, Nodirbek"] [Result "1/2-1/2"] [ECO "B10"] [WhiteElo "2502"] [BlackElo "2634"] [Annotator "TA"] [PlyCount "82"] [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 9,82,23,21,25,32,24,20,30,19,20,32,18,16,6,21,12,2,0,0,0,20,7,27,-2,10, 0,9,0,0,0,24,16,21,0,0,-11,0,0,0,-102,-102,-95,-84,-72,-77,-156,-178,-211,-12, -42,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c6 2. Nf3 d5 3. d3 Bg4 4. Nbd2 e6 5. h3 Bxf3 6. Qxf3 {B10: Caro-Kann: 2 d3 and 2 c4.} Nd7 7. g3 Bc5 8. Bg2 Ne7 9. O-O O-O 10. Qe2 {[#]} a5 $146 ({Predecessor:} 10... f5 11. Nf3 h6 12. exd5 exd5 13. b4 Bb6 14. Bb2 f4 15. g4 Ng6 16. Qe6+ Kh7 {1-0 (52) Haldorsen,B (2458)-Bryakin,M (2434) Novi Sad 2021}) 11. a4 e5 12. Nf3 Qc7 13. h4 Rfe8 14. Bh3 Bd6 15. Kh1 h6 16. Rg1 Nc5 17. Bd2 b5 18. g4 dxe4 19. dxe4 Ng6 $1 20. g5 h5 21. Bf5 Ne6 $1 22. axb5 cxb5 23. Qxb5 {[%CAl Ra1a5]} Reb8 24. Qd5 (24. Qd3 $11 {keeps the balance.}) 24... Ngf4 $1 $17 {[%CAl Rf4d5]} 25. Qa2 { [#] And now g6 would win.} ({Not} 25. Bxf4 $2 Nxf4 26. Qa2 g6 $19) 25... g6 $1 {[%CAl Rg6f5]} 26. Bxe6 Nxe6 27. Bc3 (27. c3 $142) 27... Nf4 28. Rad1 {[#]} Qd7 (28... a4 $1 $19 {[%CAl Ra4a3] Hoping for ...a3.} 29. Bd2 Ne2) 29. Rg3 (29. Rxd6 $5 Qxd6 30. Bxe5 $11) 29... Ne2 30. Nxe5 {The position is equal.} ({ Don't go for} 30. Bxe5 $2 Nxg3+ 31. Bxg3 Qh3+ 32. Nh2 Bxg3 $19) 30... Nxg3+ 31. Kg2 Qe6 32. Qxe6 fxe6 33. Rxd6 Nxe4 34. Rxe6 Nxc3 35. Rxg6+ Kh7 36. Rh6+ Kg7 37. Rg6+ $1 Kh8 38. Rh6+ $1 Kg8 39. Rg6+ $1 Kh7 40. Rh6+ Kg7 41. Rg6+ Kh7 { Weighted Error Value: White=0.13/Black=0.08} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "18.1"] [White "Keymer, Vincent"] [Black "Abdusattorov, Nodirbek"] [Result "0-1"] [ECO "A34"] [WhiteElo "2591"] [BlackElo "2634"] [Annotator "TA"] [PlyCount "68"] [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 16,68,7,8,10,0,8,8,17,-21,0,-8,0,-4,0,-25,0,-14,-25,-12,0,-37,-29,-138, -138,-130,-123,-134,-134,-147,-137,-184,-189,-175,-187,-183,-184,-212,-220, -311,-316,-584,-583,-823,-826,-1293,-1289,-2158,-2102,-1991,-2065,-29983, -29984,-29977,-3488]} 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Nxc3 7. bxc3 e5 8. d3 Be7 9. O-O O-O {A34: Symmetrical English: 2 Nc3, lines with ...d5.} 10. Qa4 Qc7 11. Nd2 Bd7 {[#] The position is equal.} 12. Qc2 $146 ({Predecessor:} 12. Nc4 a6 13. Ne3 b5 14. Nd5 Qd6 15. Nxe7+ Nxe7 16. Qc2 Bc6 17. Bxc6 Qxc6 18. Bb2 {1/2-1/2 (18) Trisic,D (2029)-Pavlovic,L (2101) Belgrade 2015}) 12... b5 {[%CAl Bb7b5,Bb5b4][%mdl 32]} 13. a4 b4 14. Bb2 Rac8 15. Rfd1 a5 16. Nc4 Be6 17. Rac1 f6 18. Ne3 Rfd8 19. c4 {White is now going downhill.} (19. Nc4 $11 {keeps the balance.}) 19... Nd4 $17 20. Bxd4 cxd4 ({ Much weaker is} 20... exd4 $6 21. Bd5 $11) 21. Nf1 f5 22. Re1 Bg5 23. Rcd1 e4 24. dxe4 Qxc4 25. Qxc4 Bxc4 ({Don't play} 25... Rxc4 26. exf5 Bf7 27. f4 $17) 26. exf5 Bb3 27. Ra1 (27. f4 $142 Bxd1 28. Rxd1) 27... Bc2 $19 28. f4 $2 {[#]} (28. Rab1) 28... Bf6 29. Nd2 d3 30. e4 Bc3 31. Rad1 Bxd1 32. Rxd1 Bxd2 33. Rxd2 b3 34. e5 Rc2 {Weighted Error Value: White=0.88/Black=0.03} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "18.2"] [White "Yip, Carissa"] [Black "Murzin, Volodar"] [Result "0-1"] [ECO "E62"] [WhiteElo "2430"] [BlackElo "2502"] [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 15,60,24,17,23,18,22,38,30,41,35,39,39,43,1,10,9,41,3,18,1,21,-32,63, -40,-39,-53,-7,-14,-5,-259,-242,-406,-346,-356,-343,-349,-345,-348,-343,-432, -425,-512,-519,-618,-618,-632,-565]} 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. c4 O-O 5. O-O d6 6. d4 Nc6 7. Nc3 Bf5 {7...e5 is the modern continuation.} 8. b3 Ne4 9. Bb2 {E62: King's Indian: Fianchetto: 6...c6 and Panno Variation (6...Nc6) without ...a6.} Nxc3 10. Bxc3 e5 11. d5 {White is slightly better.} Ne7 12. Nd2 {[#]} Qd7 $146 ({Predecessor:} 12... a5 13. e4 Bd7 14. a3 f5 15. b4 a4 16. c5 Bb5 17. Re1 f4 18. g4 g5 {1-0 (66) Grunberg,M (2401)-Obgolts,E (2376) Chess. com INT 2020}) 13. e4 Bh3 14. Rc1 Bxg2 15. Kxg2 f5 16. f3 g5 17. b4 h5 18. c5 ( 18. exf5 $11 Qxf5 19. Qe2) 18... Ng6 (18... Rf7 $15) 19. Qe2 ({White should try } 19. exf5 $14 Rxf5 20. Ne4) 19... f4 $1 $15 20. Nc4 Rf7 {Threatening ...g4.} 21. Bd2 Raf8 22. Na5 $2 {[%mdl 8192] Now White is beyond hope.} (22. cxd6 $11 { and White is okay.} cxd6 23. gxf4) 22... g4 $19 {[#] Hoping for ...fxg3.} 23. Rc3 $2 (23. gxf4 exf4 24. Kh1) 23... gxf3+ 24. Rcxf3 Qg4 25. h3 Nh4+ $1 { [%mdl 64] [#] Double Attack} 26. Kg1 Nxf3+ 27. Rxf3 Qxh3 {Black is clearly winning.} 28. gxf4 Qg4+ {[%mdl 64] Double Attack} 29. Kf1 {If White can now play f5 this consolidates a bit.} exf4 30. Nc4 Bd4 {[%csl Gd4][%CAl Rg4g1] Weighted Error Value: White=0.59/Black=0.18} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "18.3"] [White "Nihal Sarin"] [Black "Khademalsharieh, Sarasadat"] [Result "1-0"] [ECO "C47"] [WhiteElo "2620"] [BlackElo "2494"] [Annotator "Shahid"] [PlyCount "41"] [EventDate "2021.06.10"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. a4 g6 5. Bc4 Bg7 6. d3 {C47: Scotch Four Knights and Four Knights with 4 g3.} d6 7. h3 h6 8. Be3 {White has an edge.} O-O 9. Qd2 Kh7 $1 10. g4 Ng8 11. O-O-O Nd4 $1 {[%CAl Rd4f3]} 12. Bxd4 exd4 13. Ne2 c5 {[#]} 14. h4 $146 ({Predecessor:} 14. g5 Be6 15. h4 h5 16. Nf4 Bg4 17. Nh2 Bxd1 18. Qxd1 Be5 19. Ne2 Bxh2 20. Rxh2 {1-0 (41) Kineva,E (2120)-Severina, M (2032) Moscow 2011}) 14... Bxg4 $2 {[#]} (14... Ne7 $1 $17 {stays on course.} 15. Rdg1 Bd7) 15. Ng5+ $1 $16 {[%mdl 512]} hxg5 (15... Kh8 16. f3) 16. hxg5+ Nh6 {[#]} 17. Rdg1 $1 $18 {[%CAl Rg1g4] Black must now prevent Rxg4.} Bxe2 ( 17... f5 $142) 18. Qxe2 Qd7 $2 (18... b5) 19. f4 {White is clearly winning.} Qxa4 20. Kb1 Qd7 21. f5 {Weighted Error Value: White=0.08/Black=0.63} (21. f5 gxf5 22. gxh6 Bf6 23. Qg2 Rg8 24. Qg7+ Rxg7 (24... Bxg7 25. hxg7#) 25. hxg7+ Kg8 26. Rh8#) 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "18.4"] [White "Zhu, Jiner"] [Black "Liang, Awonder"] [Result "0-1"] [ECO "B01"] [WhiteElo "2462"] [BlackElo "2592"] [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 9,112,40,52,68,60,27,26,41,32,24,48,22,35,29,31,26,72,41,80,39,49,42,33, 8,27,22,59,51,41,56,72,41,50,10,77,39,39,28,43,52,88,80,95,-81,-85,-78,-90, -113,-113,-83,-107,-89,-95,-97,-92,-99,-105,-105,-108,-241,-231,-241,-105,-128, -128,-128,-128,-128,-133,-161,-161,-202,-175,-212,-190,-262,-242,-226,-264, -244,-262,-372,-359,-430,-422,-422,-422,-422,-415,-408,-408,-382,-338,-327, -297,-468,-467,-583,-583,-577,-578,-787,-544,-1317,-1120]} 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd8 4. d4 Nf6 5. Nf3 g6 6. Bc4 {B01: Scandinavian Defence.} Bg7 7. h3 O-O 8. O-O {White has an edge.} a6 9. a4 b6 10. Re1 Nc6 11. Bg5 Bb7 12. Qd2 Qd6 {[#]} 13. Rad1 $146 ({Predecessor:} 13. d5 Na5 14. Ba2 Qb4 15. Rab1 Rad8 16. Qf4 Qxf4 17. Bxf4 Nxd5 18. Nxd5 Bxd5 19. Bxd5 Rxd5 20. Rxe7 {0-1 (50) McClymont,B (2421)-Puccini,J (2265) Sydney 2020}) 13... Rad8 14. Qe2 Nb4 15. Ne5 ({Of course not} 15. Qxe7 Nxc2 16. Qxd6 Rxd6 $11) 15... e6 16. Nb1 { [%CAl Bc3b1,Bb1a3,Ba3c4,Bc4e5][%mdl 32]} h6 17. Bc1 a5 18. c3 Nbd5 19. Na3 Qe7 20. Bd3 Nd7 21. Nac4 Qf6 (21... c5 $11 {remains equal.}) 22. Ng4 Qh4 23. Kh2 Kh7 24. g3 Qh5 25. Nce5 N7f6 26. c4 $2 (26. f3 $16 {keeps the pressure on.}) 26... Nxg4+ $17 27. Nxg4 {[#]} f5 $1 28. Ne5 {Hoping for Qxh5.} (28. Ne3 Qxe2) 28... Qxe2 29. Bxe2 Nb4 30. Bf3 Ba6 31. Nc6 Nxc6 32. Bxc6 Bxc4 33. Bf4 Rxd4 34. Rxd4 (34. Rc1 $17 {was the only defense.}) 34... Bxd4 $19 35. Rc1 Ba6 (35... Bb3 $19 {has better winning chances. White must now prevent ...e5.} 36. Bb5 Rf7 37. Bxc7 Bxb2) 36. Bxc7 Bxf2 37. Rd1 Bc8 38. Be5 Bc5 39. Kg2 g5 40. Kf3 Kg6 41. b3 h5 42. Rd3 (42. h4 {might work better.}) 42... Be7 43. Rd1 Rd8 44. Rxd8 Bxd8 {[%mdl 4096] Endgame KBB-KBB} 45. Bd6 (45. Be8+ $142 Kh6 46. Bc6) 45... g4+ 46. hxg4 hxg4+ 47. Ke3 Bg5+ 48. Kd4 Bf6+ 49. Ke3 Bd8 50. Be5 Be7 51. Be8+ Kg5 52. Bc7 (52. Bc6 $142) 52... Bc5+ {Black is clearly winning.} 53. Kd2 Kf6 54. Kd3 e5 55. Kc4 Be6+ 56. Kb5 Bxb3 {Weighted Error Value: White=0.42/Black=0.17} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "18.5"] [White "Mendonca, Leon Luke"] [Black "Salimova, Nurgyul"] [Result "1-0"] [ECO "D46"] [WhiteElo "2549"] [BlackElo "2395"] [Annotator "TA"] [PlyCount "41"] [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 21,41,22,41,35,14,0,0,-6,0,-4,-32,-31,99,132,227,221,1179,1191,2495, 2281,29991,29992]} 1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. e3 e6 5. Nc3 Nbd7 6. Qc2 Bd6 7. Bd3 dxc4 8. Bxc4 b5 9. Be2 Bb7 10. O-O O-O 11. e4 e5 12. dxe5 {D46: Semi-Slav: 5 e3 Nbd7 6 Bd3, Black avoids the Meran.} Nxe5 13. Nd4 Neg4 14. Nf5 {The position is equal.} Bxh2+ 15. Kh1 {[#]} Bb8 $146 ({Predecessor:} 15... g6 16. f3 gxf5 17. fxg4 Bc7 18. Bg5 h6 19. Rad1 Qe7 20. Qc1 Rfd8 21. Nd5 cxd5 22. Rxf5 Nxe4 23. Bxe7 {1-0 (31) Nguyen,T (2571)-Mendonca,L (2499) Bad Wiessee 2020 }) 16. Bg5 {f4 is the strong threat.} Qc7 $4 (16... Bc8 $1 $15 {keeps the upper hand.}) 17. f4 $16 {aiming for e5.} b4 {[#]} (17... h6 $16 {was worth a try.} 18. Bxf6 Nxf6) 18. e5 $1 $18 {[%CAl Re5f6]} bxc3 $2 (18... Nxe5 19. Bxf6 gxf6) 19. exf6 gxf6 20. Qxc3 Ne5 21. Bxf6 {[%CAl Rf5h6] Weighted Error Value: White=0.02/Black=1.23} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "18.6"] [White "Praggnanandhaa R"] [Black "Badelka, Olga"] [Result "1/2-1/2"] [ECO "D32"] [WhiteElo "2608"] [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 24,97,41,14,0,0,2,0,10,14,19,19,16,19,14,17,8,8,18,0,5,0,0,0,8,0,0,0,0, 0,15,28,17,8,17,4,11,0,0,0,0,0,0,0,0,0,0,0,0,0,45,43,45,45,39,8,8,0,45,0,12,8, 36,8,8,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 O-O 5. Bg5 h6 6. Bh4 d5 7. e3 c5 8. cxd5 exd5 9. dxc5 Be6 10. Be2 Nc6 11. O-O Bxc5 12. Rc1 Be7 13. Qa4 Qb6 {D32: Tarrasch Defence: Sidelines and lines without g3.} 14. Qb5 Rfd8 15. Rfd1 Qxb5 16. Nxb5 {[#]} g5 $146 ({Predecessor:} 16... Rac8 17. Nfd4 Nxd4 18. Nxd4 Rxc1 19. Rxc1 Rc8 20. Rxc8+ Bxc8 21. Bd1 g5 22. Bg3 Ne4 { 1-0 (59) Hort,V (2595)-Dankert,P (2345) Hamburg 1980}) 17. Bg3 Ne4 18. Nfd4 Nxg3 19. hxg3 Nxd4 20. Nxd4 Rac8 21. f4 Bf6 22. Kf2 Bxd4 23. exd4 Kg7 24. Bd3 Kf6 25. Rh1 Rxc1 26. Rxc1 $11 {[%mdl 4096] Endgame KRB-KRB} Rc8 27. Rh1 Kg7 28. Kf3 Bd7 29. Ke3 a6 30. Kd2 Bb5 31. Bxb5 (31. Bc2 {with more complications.} a5 32. a4 Ba6 33. fxg5 hxg5 34. Rh5) 31... axb5 32. fxg5 hxg5 {KR-KR} 33. Re1 Rc4 34. Kd3 Ra4 35. Re5 Rxa2 36. Kc3 Ra4 37. Rxg5+ Kf6 {[#] White must now prevent ...Rc4+.} 38. Rxd5 Rc4+ 39. Kd3 Rb4 40. Kc3 Rc4+ 41. Kd3 Rb4 42. Kc2 {[#] And now b3 would win.} Rc4+ (42... Ke6 {is more complex.} 43. Re5+ Kd6 44. Re4 Rc4+ 45. Kb1 Rb4) 43. Kb1 b4 {The position is equal.} 44. Rd7 Ke6 45. Rxb7 Rxd4 46. Ka2 Rg4 47. Kb3 Rxg3+ 48. Kxb4 Rxg2 49. Kc3 {Weighted Error Value: White=0.07/ Black=0.04} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "18.7"] [White "Bjerre, Jonas Buhl"] [Black "Gukesh D"] [Result "0-1"] [ECO "E94"] [WhiteElo "2542"] [BlackElo "2578"] [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 17,71,21,46,29,56,55,62,55,64,26,18,27,23,18,70,71,71,8,81,0,65,0,0,-54, -50,-129,-101,-449,-428,-385,28,-247,-83,-205,0,-288,-218,-183,-196,-432,-420, -1085,-1050,-29993,-29994,-29994,-29995,-29995,-29996,-29996,-29997,-29997, -29998,-29998,-29999,-29999]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Na6 8. Be3 Qe8 {8...c6 is becoming the main line.} 9. dxe5 dxe5 10. Rb1 {E94: King's Indian: Classical: 6 Be2 e5 7 0-0: Various Black 7th moves.} Ng4 11. Bc1 {[#]} Nc5 $146 ({Predecessor:} 11... c6 12. b4 Qe7 13. Ba3 Rd8 14. b5 Qe8 15. Qa4 Nc7 16. Rfd1 Rxd1+ 17. Rxd1 Bd7 {0-1 (63) Krak,T (2297) -Neuman,P (2471) Slovakia 2012}) 12. b4 {White is slightly better.} Ne6 13. Ba3 c6 14. b5 {aiming for Bd6.} c5 15. Nd5 f5 (15... Nf6 $11) 16. exf5 $14 gxf5 17. h3 (17. g3 $16) 17... Nh6 (17... Nf6 $1 $11) 18. Qc1 (18. Bb2 $16) 18... Kh8 { [#]} (18... e4 $11) 19. Ng5 (19. Nxe5 $1 $14 Nd4 20. Bd3 Qxe5 21. Bxc5) 19... Nd4 $11 20. Bd1 (20. Re1 $1 $11 b6 21. Nc7 {[%mdl 64] Double Attack} Nxe2+ 22. Rxe2) 20... b6 $15 21. Nc7 (21. f4 $15) 21... Qg6 $17 22. Nxa8 $4 {[%mdl 8192]} (22. f4 $17 {is a better chance.} Rb8 23. Nd5) 22... f4 $19 23. h4 Bf5 $2 {[#]} ({Better is} 23... Nhf5 $1 $19 {[%CAl Rf5h4]} 24. g3 h6) 24. Ra1 $2 {[%mdl 8192] [#]} (24. Rb3 $1 $11 {and White stays safe.} Nxb3 (24... Rxa8 25. Bb2) 25. axb3 Rxa8 26. Re1) 24... Rxa8 $2 (24... Bd3 $1 $19 {is more deadly. ... Nhf5 is the strong threat.} 25. Nh3 (25. Nc7 $2 Nhf5 $19) 25... Rxa8) 25. Re1 ( 25. Bb2 $17) 25... Rf8 $2 ({Black should play} 25... Rg8 $19 26. Bb2 Bf6 27. Bxd4 cxd4) 26. Bf3 $2 {[%mdl 8192]} (26. Bb2 $11 {and White is okay.}) 26... Nf7 27. Nxf7+ Rxf7 28. Bd5 (28. Qd1 Rf8 29. h5) 28... Rd7 {Strongly threatening ...Rxd5!} 29. Bb2 {[#]} (29. Ba8 $142 e4 30. Qxf4 Nf3+ {[%mdl 64] Double Attack, Discovered Attack} 31. Kf1 (31. Kh1 $2 Be5 $19)) 29... Rxd5 $1 { [%mdl 512]} 30. cxd5 (30. Kh2 Rd8) 30... Bh3 {[%csl Gh3][%CAl Rg6g2] Black mates.} 31. g3 Nf3+ {[%mdl 64] Double Attack} 32. Kh1 fxg3 33. fxg3 Qxg3 { [%csl Gf3][%CAl Rg3h2][%mdl 64] Double Attack} 34. Qc2 {[#]} Bg2+ $1 {[%mdl 512]} 35. Qxg2 Qxh4+ 36. Qh3 Qxh3# {Weighted Error Value: White=1.15/Black=0.53 } 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "18.8"] [White "Lei, Tingjie"] [Black "Yoo, Christopher Woojin"] [Result "1/2-1/2"] [ECO "E05"] [WhiteElo "2505"] [BlackElo "2457"] [Annotator "TA"] [PlyCount "118"] [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 13,118,0,1,0,26,24,12,10,21,30,21,35,32,34,29,36,33,27,27,22,52,12,20, -7,-7,-7,-8,-9,-10,-7,-6,-12,0,0,0,0,0,0,5,0,5,5,5,5,5,5,16,0,7,0,0,0,0,0,0,0, 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,-28000,-28000, -28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000, -28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000]} 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Nf3 Be7 5. Bg2 O-O 6. O-O dxc4 7. Qc2 b5 8. a4 {E05: Open Catalan: 5 Nf3 Be7.} Bb7 9. axb5 a6 10. bxa6 {The position is equal.} Nxa6 {[%CAl Bb8a6, Ba6b4,Bb4c2][%mdl 32]} 11. Qxc4 Bd5 12. Qc3 {[#]} c5 $146 ({Predecessor:} 12... Ne4 13. Qe3 c5 14. Nc3 cxd4 15. Nxd4 Nxc3 16. bxc3 Nc5 17. Rxa8 Qxa8 18. Bxd5 Qxd5 {0-1 (48) Belous,V (2524)-Titus,A (2158) Chess.com INT 2020}) 13. Be3 Ne4 14. Qe1 Nb4 15. Rxa8 Qxa8 16. Nc3 Nc2 17. Qc1 Nxe3 18. Qxe3 cxd4 19. Qxd4 Bf6 20. Qe3 Nxc3 21. bxc3 Rc8 22. Rc1 Bxc3 23. Nh4 Bxg2 24. Nxg2 e5 25. Nh4 Bd4 26. Rxc8+ Qxc8 27. Qe4 g6 28. Nf3 Qc5 29. e3 Bc3 30. Qd3 h6 31. g4 Qc6 32. Kg2 Kg7 {[#] Hoping for ...e4!} (32... e4 $5 33. Qd8+ $8 Kg7 $11) 33. Qc2 Qe6 34. h3 Bb4 35. Qe4 Bd6 36. Nd2 Bc7 37. Qc2 Qd5+ 38. e4 Qd7 39. Nc4 Qc6 40. Ne3 Qxc2 41. Nxc2 $11 {[%mdl 4096] Endgame KB-KN} Kf6 42. Ne3 {[#] aiming for Nd5+.} Ke6 43. Nd5 Bd6 44. Kf3 f5 45. gxf5+ gxf5 46. Ne3 fxe4+ 47. Kxe4 Bc5 48. Ng4 $2 { [%mdl 8192]} (48. f3 $11) 48... h5 49. Nxe5 Bxf2 50. Nf3 {Mate.} Bg3 51. Ng5+ Kf6 52. Nf3 h4 53. Nxh4 Bxh4 {KB-KP} 54. Kf4 Kg6 55. Kg4 Bd8 56. h4 Be7 57. h5+ Kh6 58. Kf5 Bf6 59. Kxf6 Kxh5 {[%mdl 32768] Weighted Error Value: White=0.02/ Black=0.02. An unexpected result.} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "18.9"] [White "Abdumalik, Zhansaya"] [Black "Saduakassova, Dinara"] [Result "1-0"] [ECO "C54"] [WhiteElo "2472"] [BlackElo "2500"] [Annotator "TA"] [PlyCount "69"] [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 13,69,18,23,4,20,12,10,17,13,7,0,-8,-9,-14,0,0,39,18,22,24,37,20,34,0, 58,33,105,112,106,110,120,114,129,0,0,0,204,204,204,197,214,202,193,200,191, 195,390,387,717,510,502,502,634,643,642,642,613,622]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. O-O Nf6 5. d3 a6 6. c3 d6 7. Nbd2 O-O 8. h3 {C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3.} h6 {has lost popularity (8...Ba7).} 9. b4 {9.a4 is setting a new trend.} Ba7 10. a4 {The position is equal.} Ne7 11. Re1 Ng6 12. Nf1 c6 13. Ng3 {[#]} a5 $146 ({Predecessor:} 13... Re8 14. a5 d5 15. Bb3 Be6 16. Be3 Bxe3 17. Rxe3 Qd7 18. c4 Rad8 19. cxd5 cxd5 {0-1 (62) Eggleston,D (2403)-Pulpan,J (2397) Olomouc 2019}) 14. b5 Bc5 15. d4 exd4 16. Nxd4 d5 17. exd5 Nxd5 18. Qh5 (18. bxc6 $2 Nxc3 19. c7 Qxd4 $19) 18... Qh4 ( 18... Bxd4 $11 19. cxd4 Be6) 19. bxc6 bxc6 (19... Qxh5 $14 20. Nxh5 bxc6) 20. Qxh4 $16 Nxh4 21. Nxc6 Be6 22. Ne4 Nxc3 {[#]} 23. Nxc3 ({White should play} 23. Bxe6 $1 $16 Nxe4 24. Rxe4 fxe6 25. Be3 (25. Rxe6 $2 Rxf2 26. Kh1 Rf1+ 27. Kh2 Raf8 $19) 25... Bxe3 26. fxe3 (26. Rxe3 Rfe8 $16)) 23... Bxc4 $11 24. Re4 { [%mdl 64] Double Attack} Rfe8 $2 25. Rxc4 $18 Re1+ 26. Kh2 Bxf2 27. Bb2 { aiming for Rxe1.} Rae8 28. Rxe1 ({Worse is} 28. Nxa5 Nf5 $15) 28... Rxe1 29. Re4 {[#] Hoping for Rxe1.} ({And not} 29. Nxa5 Nf5 $11) 29... Rf1 (29... Bg1+ 30. Kg3 Nf5+ 31. Kg4 Ne3+ 32. Kf3 f5) 30. Ne2 Re1 $2 (30... Be1 31. Bc3 Bxc3 32. Nxc3 g5 33. Nxa5 Rc1) 31. Bd4 {White is clearly winning.} Bxd4 32. Ncxd4 g5 33. Re5 f5 34. g3 Ng6 35. Rxf5 {Weighted Error Value: White=0.17/Black=0.40} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "18.10"] [White "Shuvalova, Polina"] [Black "Mammadzada, Gunay"] [Result "0-1"] [ECO "B92"] [WhiteElo "2489"] [BlackElo "2443"] [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 16,142,22,6,27,0,27,-27,-22,-30,5,-37,-13,-31,-37,-51,-48,-56,-33,-71, -35,-48,-26,-35,-26,-19,-22,-22,0,0,60,56,66,41,54,0,0,-97,-79,-138,-119,-129, -111,-141,-58,-60,0,0,47,0,106,28,50,0,0,0,92,80,91,58,56,49,68,56,293,323,285, 237,595,589,667,660,707,704,819,817,804,797,744,561,714,725,779,632,697,355, 386,365,380,377,385,381,370,-1662,-1646,-29972,-29974,-29970,-1044,-1041,-1037, -1041,-1031,-926,-926,-924,-456,-6112,-5882,-29975,-29976,-29977,-29977,-29977, -29977,-29976,-29977,-29975,-29976,-29981,-29982,-29982,-29983,-29983,-29984, -29985,-29986,-29986,-29985]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. O-O O-O 9. Qd3 b6 {B92: Sicilian Najdorf: 6 Be2.} 10. a4 Bb7 {[#]} 11. Nd5 $146 (11. Bg5 $142) ({Predecessor:} 11. Bg5 Nbd7 12. Rfd1 Rc8 13. Rd2 Rxc3 14. bxc3 Nxe4 15. Bxe7 Qxe7 16. Rdd1 d5 17. f3 {0-1 (35) Jurcisin,I (2044)-Csiba,D (2358) Slovakia 2015}) 11... Nxd5 $11 {Black has an edge.} 12. exd5 a5 13. Kh1 Nd7 14. c4 Rc8 15. Qh3 Ba6 16. Nd2 Nc5 17. b3 Bg5 18. Bd1 f5 19. Bc2 e4 20. g4 Qf6 21. Rb1 {White wants to play f4.} Bxd2 22. Bxd2 f4 (22... fxg4 $11 23. Qxg4 Rce8) 23. Bc3 $14 Qg5 24. f3 Rce8 25. Rbe1 ( 25. fxe4 $14 h6 26. Qg2) 25... Bc8 $11 26. fxe4 (26. Bd4 $11) 26... Bxg4 $17 ( 26... Qxg4 27. Qxg4 Bxg4 28. e5 $16) 27. Qg2 (27. Rg1 $142 h5 28. Qg2) 27... Qh5 28. Rf2 {Threatens to win with Rg1.} g6 29. Rg1 {[#]} Bh3 (29... Be2 $1 $17 {[%mdl 512]} 30. Bd4 {[#]} (30. Rxe2 $2 f3 $19 {[%mdl 64] Double Attack}) (30. Bd2 f3) 30... Rf7 $1) 30. Qf3 $15 {Qxh5 is the strong threat.} Qxf3+ ({Black should play} 30... Qh4 $1 $15) 31. Rxf3 $11 Bc8 32. Re1 Nd7 (32... g5 $11) 33. Bd4 (33. Ref1 $16) 33... Re7 34. h4 Ne5 35. Rf2 Nd7 (35... f3 $11 {keeps the balance.}) 36. Ref1 $16 Ref7 37. Rg1 f3 $1 38. h5 Rf4 $1 39. hxg6 Ne5 $2 ({ Black should try} 39... h5 $1 $14) 40. gxh7+ $18 ({Less strong is} 40. Bxb6 Ng4 $16) 40... Kh8 41. Rg5 Re8 $2 (41... Rh4+ 42. Kg1 Rh3) 42. Kg1 Bh3 43. Rg3 Bd7 44. Bxb6 Bg4 45. Bd4 Kxh7 46. Rh2+ Kg6 47. Be3 Rf7 48. Kf2 Rg7 49. Rh6+ Kf7 50. Rxd6 Rh8 {next ...Rh2+ is good for Black.} 51. Rh6 Rxh6 52. Bxh6 Rh7 53. Bf4 Rh2+ 54. Ke3 $4 {[%mdl 8192] [#]} (54. Kg1 $18 Rxc2 55. Bxe5 Rc1+ 56. Kf2 Rc2+ 57. Ke1 Re2+ 58. Kf1 Rxe4 59. Bc7) 54... f2 $1 $19 55. Bd3 (55. Rh3 f1=Q) 55... Nxd3 56. Rxg4 f1=Q 57. Bxh2 Qf2+ 58. Kxd3 {[%mdl 4096] Endgame KQ-KRB} Qf3+ { [%mdl 64] Double Attack} 59. Kd4 Qxg4 60. Bc7 Qd1+ (60... Qg1+ $142 61. Kc3 Qc1+ 62. Kd3 Qb1+ 63. Kd4 Qxb3 64. Bxa5 Qd1+ 65. Kc5 Qxa4) 61. Kc5 (61. Kc3 $142) 61... Qxb3 62. Bxa5 Qxa4 {Black mates.} 63. Bc7 Qa3+ 64. Kb5 Qb3+ 65. Kc5 Qe3+ 66. Kc6 Qxe4 67. c5 Ke7 68. Bd6+ Kd8 69. Bc7+ Kc8 70. Bd6 Qa4+ 71. Kb6 Qb3+ {Never resign too early! Weighted Error Value: White=0.33/Black=0.42} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "19.1"] [White "Mammadzada, Gunay"] [Black "Keymer, Vincent"] [Result "0-1"] [ECO "B90"] [WhiteElo "2443"] [BlackElo "2591"] [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 12,110,25,13,31,18,29,14,15,19,23,19,8,2,22,22,28,17,9,0,10,4,0,0,0,-65, -74,-72,-58,-58,-62,-63,-71,-91,-91,-91,-71,-91,-91,-118,-113,-168,-158,-172, -151,-244,-244,-243,-242,-235,-172,-147,-94,-221,-203,-212,-197,-191,-184,-174, -169,-198,-213,-272,-272,-286,-278,-237,-247,-276,-245,-268,-268,-268,-264, -268,-265,-208,-239,-961,-953,-945,-912,-1138,-972,-2068,-1959,-5197,-5189, -29976,-29975,-29980,-29979,-29979,-29980,-29982,-29983,-29983,-29984,-29983, -29984]} 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. Bg5 Be6 9. Bxf6 Qxf6 {The position is equal.} 10. Nd5 Qd8 11. Nec3 g6 12. Bc4 Bh6 13. Qd3 Nc6 14. O-O O-O 15. Bb3 Nd4 $5 {[%mdl 4] An interesting side line.} 16. Rad1 Rc8 17. Ne3 Qh4 { [#]} 18. Ne2 $146 (18. Ncd5 $11) ({Predecessor:} 18. Ncd5 Rc5 19. c3 Nxb3 20. axb3 Bxe3 21. b4 Bxd5 22. bxc5 Bb3 23. Qxe3 Bxd1 24. Rxd1 dxc5 25. Rd5 { 1/2-1/2 (25) Cavajda,I (2475)-Stoeckert,M (2460) ICCF email 2018}) 18... Bxb3 $15 19. cxb3 Nxe2+ 20. Qxe2 Qxe4 21. Rxd6 Bxe3 22. Qxe3 Qxe3 23. fxe3 Rfd8 24. Rxd8+ Rxd8 $17 {[%mdl 4096] Endgame KR-KR} 25. Rf2 Rd1+ 26. Kh2 (26. Rf1 $17 Rd3 27. e4) 26... Re1 $19 27. Rc2 Rxe3 28. Rc7 (28. b4 $17) 28... Re2 29. Rxb7 Rxb2 30. Re7 Re2 ({But not} 30... Rxa2 31. Rxe5 Kg7 32. Re7 $17) 31. a4 Kg7 ( 31... h4 $142 32. Re8+ Kg7) 32. Kg3 {This costs White the game.} (32. Kg1 $17) 32... Kf6 33. Rb7 Re3+ 34. Kf2 Rc3 35. b4 {intending Rb6+.} Rb3 $1 36. h4 Ke6 $1 37. a5 f6 $1 38. Rb6+ Kf5 39. Ke2 e4 40. Kd2 Rb2+ 41. Ke3 {[#]} Ke5 $1 { ...f5 is the strong threat.} ({And not} 41... Rxg2 42. Rxa6 g5 43. hxg5 $11) 42. g3 Rb3+ 43. Kf2 {[#]} Kf5 $1 44. Ke2 g5 ({Not} 44... Rxg3 45. Rxa6 g5 46. hxg5 $11) 45. Kf2 $2 (45. hxg5 fxg5 46. Rxa6) 45... gxh4 46. gxh4 Ke5 47. Ke2 f5 48. Rxa6 Rxb4 49. Rh6 Rb2+ 50. Ke1 Ra2 {Black mates.} 51. Rxh5 Rxa5 52. Rh8 Kf4 53. Rg8 Kf3 54. Kd2 e3+ 55. Kd3 f4 {Weighted Error Value: White=0.65/ Black=0.04} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "19.2"] [White "Saduakassova, Dinara"] [Black "Shuvalova, Polina"] [Result "1/2-1/2"] [ECO "E05"] [WhiteElo "2500"] [BlackElo "2489"] [Annotator "TA"] [PlyCount "170"] [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 18,170,16,10,9,7,6,-2,11,0,20,24,23,20,16,0,12,0,0,0,0,-7,0,-26,0,-14,0, -61,-23,-20,-9,-66,-81,-75,-49,-49,-49,-60,-81,-88,-85,-81,-82,-89,-80,-86,-76, -85,-27,-66,-66,-66,-66,-66,-66,-66,-66,-66,-27,-94,-16,-66,-66,-66,-66,-66,0, -27,0,-12,0,0,0,-59,0,0,0,0,0,-53,0,-21,0,0,0,0,0,0,4,0,0,0,8,8,56,56,121,9,29, 17,198,116,561,554,29965,29965,29965,6560,5608,1399,4781,4935,4790,1598,29966, 29967,29963,29964,29966,29968,29968,29968,29970,29973,29973,29974,29974,29975, 29974,29973,29973,29974,29974,29975,29978,29979,29979,29980,29977,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0]} 1. Nf3 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. O-O O-O 6. d4 dxc4 7. Qc2 a6 8. a4 Bd7 9. Qxc4 Bc6 10. Bf4 Bd6 {E05: Open Catalan: 5 Nf3 Be7. } 11. Qc1 Nbd7 12. Nc3 a5 13. Re1 Bxf4 (13... Bxf3 $5 14. Bxd6 cxd6 15. Bxf3 d5 $11) 14. Qxf4 Bxf3 15. Bxf3 c6 {[#]} 16. h4 $146 ({Predecessor:} 16. Rad1 Qe7 17. Qd2 Rfd8 18. Qc2 g6 19. Bg2 e5 20. e3 Nb6 21. dxe5 Qxe5 22. Qb3 {0-1 (69) Banusz,T (2606)-Sanal,V (2487) Tegernsee 2018}) 16... Nb6 17. h5 h6 18. Red1 Qe7 19. Kg2 Rfd8 20. Rd3 Rd7 21. Ne4 Nxe4 22. Bxe4 (22. Qxe4 $11 Qb4 23. b3) 22... Rad8 (22... Nd5 {seems wilder.} 23. Qf3 Nf6 24. e3 Nxe4 25. Qxe4 Rd5) 23. Qd2 Nd5 {...Nb4 is the strong threat.} 24. Bxd5 (24. Qxa5 $11 b6 25. Qe1) 24... Rxd5 $15 25. Rh1 Qd6 {[%CAl Rd5d4]} 26. Rh4 c5 {[%CAl Rc5d4]} 27. dxc5 Qc6 { Strongly threatening ...Rxd3+.} (27... Rxd3 28. Qxd3 Qxd3 29. exd3 $11) 28. Rxd5 Rxd5 $17 {[%mdl 4096] Endgame KQR-KQR} 29. Qf4 Rxh5+ $1 30. Qf3 Rxc5 31. b4 Rd5 32. bxa5 Qc5 (32... Rxa5 $17 33. e3 Qxf3+ 34. Kxf3 b5 35. axb5 Rxb5) 33. Re4 Qxa5 34. Rc4 {next Rc8+ is good for White.} Rd7 35. Rc8+ Kh7 36. Qe4+ g6 37. Qc4 Qe5 (37... Kg7 {is interesting.} 38. Rc5 Qd2 39. Rb5 Rd4 40. Qc5 Rd5) 38. Ra8 (38. Qb4 $1 $11) 38... Rc7 ({Black should play} 38... Rd1 $17 {aiming for ...Qh5.} 39. Qg4 Kg7) 39. Qb4 Qd5+ $1 40. e4 {Qf8 would kill now.} Qc5 { [%CAl Rc5b4]} 41. Qb2 {[%csl Ga8][%CAl Rb2h8]} e5 (41... Qc3 $15 42. Qb5 g5) 42. Rb8 (42. a5 $5 {[%CAl Ra5a6]}) 42... Qe7 (42... Qd4 {is more complex.} 43. Qxd4 exd4 44. Rd8 Rc4 45. Rd7 Kg8) 43. Qb5 Kg7 (43... f6 {looks sharper.} 44. a5 h5 45. Qb6 Kg7 46. Qb3 Qf7) 44. Re8 Qd6 45. Rxe5 (45. Qxe5+ $11 Qxe5 46. Rxe5) 45... Qf6 (45... Rc2 $15 46. Rd5 Qf6) 46. Rc5 $11 Re7 47. e5 (47. Rc4 { is more complex.} Qe6 48. Rb4 Rd7 49. Qe2 Qf6 50. e5) 47... Qf5 48. Qb2 (48. Qe2 $11) 48... Kh7 (48... Qe4+ $15 49. f3 Qxa4) 49. a5 h5 50. Qd4 Rd7 51. Rd5 Re7 52. Rc5 Qe6 53. Qd6 (53. Rb5 {with more complications.} Kg7 54. Qe4 Qc8 55. Kh2 Qd7 56. Rc5) 53... Kg7 54. Qxe6 (54. Rb5 {feels hotter.} Qxd6 55. exd6 Rd7 56. Kh3 Kf6 57. f4) 54... Rxe6 {KR-KR} 55. Rb5 Ra6 56. f4 g5 ({Black should try } 56... Ra7 $14) 57. f5 ({Much weaker is} 57. Rxb7 $6 Rxa5 58. e6 (58. fxg5 Rxe5 59. Kh3 Kg6 $11) 58... Kf6 $11) (57. fxg5 $16 {Black must now prevent Kh3. } Rg6 58. Rxb7) 57... Kh6 $1 58. Kf3 Kg7 $2 (58... h4 $11 {and Black has nothing to worry.}) 59. Ke4 ({Worse is} 59. Rxb7 Rxa5 60. Ke4 Ra4+ 61. Ke3 Ra3+ 62. Ke4 Ra4+ 63. Kf3 Ra3+ 64. Ke4 Ra4+ $11) (59. g4 $1 $18 {[%CAl Rg4h5]} Kh6 60. gxh5 (60. Rxb7 hxg4+ 61. Kxg4 Rxa5 $11) 60... Kxh5 61. Rc5 (61. Rxb7 Rxa5 62. Rxf7 g4+ 63. Ke4 Ra4+ 64. Ke3 Ra3+ 65. Kf4 Ra4+ 66. Ke3 Ra3+ 67. Kf4 Ra4+ 68. Ke3 $11)) 59... Ra8 $2 {[%mdl 8192]} (59... h4 $16 {is more resistant.}) 60. Rxb7 $18 Rxa5 61. e6 $1 Ra4+ 62. Kf3 (62. Kd5 $142 Ra5+ 63. Ke4 Ra4+ 64. Kd3 Ra3+ 65. Kc4 Ra4+ 66. Kd3 Ra3+ 67. Kc4 Ra4+ 68. Kb3) 62... Ra3+ 63. Kg2 ( 63. Ke2 $142 Ra2+ 64. Kd3 Ra3+ 65. Kd2 Ra2+ 66. Ke3 Ra3+ 67. Ke4 Ra4+ 68. Kf3 Ra3+ 69. Ke2 Ra2+ 70. Kd3 Ra3+ 71. Ke4 Ra4+) 63... Ra2+ 64. Kf1 Ra1+ 65. Ke2 ( 65. Kf2 $142 Ra2+ 66. Ke3 Ra3+ 67. Kd2 Ra2+ 68. Ke3 Ra3+ 69. Ke4 Ra4+ 70. Kd3 Ra3+ 71. Ke4 Ra4+) 65... Ra2+ 66. Ke3 Ra3+ 67. Kd4 Ra4+ 68. Ke5 Ra5+ 69. Kd6 Ra6+ 70. Ke7 fxe6 71. f6+ Kg6 72. f7 Ra8 73. f8=Q Rxf8 74. Kxf8 {KR-K3P} Kf5 75. Rb4 e5 {[#]} 76. Kg7 $1 {[%CAl Rg7h6]} e4 {[#]} 77. Kh6 $1 h4 78. gxh4 $2 ( 78. Rb5+ {mates} Kf6 79. g4 h3 80. Rxg5 Ke7 81. Rb5 Kf8 82. g5 h2 83. Rb1) 78... gxh4 $11 {KR-KPP. The position is equal.} 79. Kh5 e3 80. Kxh4 {KR-KP} ( 80. Rb2 {keeps more tension.} Kf4 81. Kh6 Kf3 82. Kg5 e2 83. Rb1) 80... e2 81. Rb1 Kf4 82. Kh3 {White wants to mate with Kg2.} Kf3 83. Kh2 {White threatens Kg1 and mate.} Kf2 84. Kh3 e1=Q 85. Rxe1 Kxe1 {Black escapes into a draw. Weighted Error Value: White=0.20/Black=0.47} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "19.3"] [White "Yoo, Christopher Woojin"] [Black "Abdumalik, Zhansaya"] [Result "1-0"] [ECO "B45"] [WhiteElo "2457"] [BlackElo "2472"] [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 22,95,50,48,50,32,135,132,138,136,187,157,116,127,123,120,154,164,153, 147,192,183,377,371,591,269,591,366,370,261,385,343,940,937,926,902,866,708, 687,362,363,335,329,322,466,472,623,351,354,359,301,285,282,304,379,377,372, 355,576,567,556,545,1025,1004,1003,1004,1004,1004,993,232,969,987,929,931,1000, 997]} 1. e4 c5 2. Nf3 Nc6 3. Nc3 e6 4. d4 cxd4 5. Nxd4 Nf6 6. Nxc6 bxc6 7. e5 Nd5 8. Ne4 Qc7 9. f4 Qb6 10. c4 Bb4+ {10...Bb4+ scores better than 10...Ne3.} 11. Ke2 f5 12. exf6 Nxf6 {[#] B45: Sicilian Four Knights.} 13. Be3 $1 Qa6 ( 13... Qd8 $14 14. Nd6+ Bxd6 15. Qxd6 Bb7) 14. Nxf6+ $1 $16 gxf6 {White is clearly better.} 15. Kf2 Qa5 (15... Be7 $16) 16. c5 {And now a3 would win.} O-O {[#]} (16... Bxc5 $2 17. Qh5+ Kd8 18. Qxc5 $18) 17. Qc2 $146 ({Predecessor:} 17. Qd4 e5 18. Bc4+ Kh8 19. Qd6 Ba6 20. Bxa6 Qxa6 21. a3 exf4 22. Bxf4 { 1-0 (22) Dmochowska,A (2073)-Koubova,A (1805) Balatonszarszo 2017}) 17... Qd8 18. Bd3 f5 19. Rhf1 Ba5 20. Kg1 Bc7 21. Bd4 Qh4 $2 (21... d5 {was worth a try.} 22. Qf2 Kf7) 22. Rf3 $18 Rb8 (22... Rf7 $142 23. Be2 a5) 23. Raf1 (23. Qc3 $142 ) 23... Rf7 $2 (23... Rb4) 24. Rh3 Qe7 25. Rff3 d6 (25... Rb4 $142) 26. Qc3 e5 $2 (26... d5 27. Rh5 Kf8) 27. cxd6 Bxd6 28. fxe5 Bb4 29. Qxc6 Qd7 30. Qxd7 Rxd7 31. Rhg3+ ({Worse is} 31. Bxf5 Rxd4 32. Rfg3+ (32. Bxh7+ Kg7 $17) 32... Kf8 $15 ) 31... Kh8 32. Bf2 Bb7 (32... Rd8 $142 33. h3 Ba5) 33. e6 Rd6 34. Rxf5 Be4 { [#]} 35. Rb5 {[%CAl Rb5b8]} Rxb5 36. Bxb5 Rd1+ 37. Bf1 {Rg4 is the strong threat.} Bd5 {With the idea ...Bc4.} 38. Rg4 a5 39. a3 (39. Bd4+ $2 Rxd4 $1 { [%mdl 512]} 40. Rxd4 Bc5 $19) 39... Be7 (39... Bd6 {is a better defense.} 40. b4 (40. Bd4+ $2 Rxd4 {[%mdl 64] Remove Defender} 41. Rxd4 Bc5 $17) 40... axb4) 40. b4 axb4 41. axb4 (41. Bd4+ $2 {[#]} Rxd4 $1 {[%mdl 512]} 42. Rxd4 Bc5 $19) 41... h5 42. Bd4+ Kh7 43. Rg7+ {[%mdl 64] Double Attack} Kh6 44. Rxe7 Bc4 45. Be3+ Kg6 {[%csl Gc4][%CAl Rd1f1]} 46. Rf7 {White is clearly winning.} Bxe6 47. Rf4 Rb1 48. b5 {Weighted Error Value: White=0.42/Black=0.77} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "19.4"] [White "Gukesh D"] [Black "Lei, Tingjie"] [Result "1-0"] [ECO "D02"] [WhiteElo "2578"] [BlackElo "2505"] [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 9,135,8,8,7,11,0,0,0,0,-1,0,0,0,0,82,90,84,33,32,27,64,66,63,63,68,62, 67,61,97,98,150,104,235,154,152,170,150,133,141,135,140,119,129,88,105,57,66, 59,75,83,129,33,29,26,20,-2,0,0,0,0,0,-12,70,66,71,61,64,68,97,77,145,131,144, 131,133,127,255,102,122,8,431,255,694,653,1067,985,1598,1507,1287,255,255,248, 241,8,8,8,8,8,8,8,8,8,8,8,1349,859,3048,1606,1602,1547,1360,1287,1172,1116, 1068,1059,5590,5575,5575,5347,5057,4813,4622,4622,1575,1307,1029,575]} 1. d4 Nf6 2. Nf3 d5 3. Bf4 e6 4. e3 Bd6 5. Nbd2 {[%CAl Bb1d2,Bd2f3,Bf3g5][%mdl 32]} O-O 6. Bd3 {D02:1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4.} b6 7. Ne5 c5 {is currently scoring better than 7...Bb7.} 8. c3 {The position is equal.} Qc7 9. h4 $5 {[%mdl 4] A promising side line.} Nbd7 { [%CAl Rd7e5]} 10. Ndf3 Ne4 {[#]} 11. Ng5 $146 ({Predecessor:} 11. Qb1 Bb7 12. Nxd7 Qxd7 13. Ne5 Qc7 14. f3 f6 15. fxe4 fxe5 16. dxe5 Bxe5 17. g3 Bxf4 18. gxf4 {1-0 (48) Tari,A (2625)-Samunenkov,I (2209) Chess.com INT 2021}) 11... Nxe5 (11... Bxe5 $11 {remains equal.} 12. dxe5 Nxe5) 12. dxe5 $16 Bxe5 13. Qh5 $40 {[%mdl 128] White has some attack.} (13. Nxe4 $16 dxe4 14. Bxe4 Bxf4 15. Bxa8 Bxe3 16. Qe2 (16. fxe3 Qg3+ {[%mdl 64] Double Attack} 17. Kf1 Ba6+ { [%mdl 64] Discovered Attack} 18. Kg1 Qxe3+ 19. Kh2 Qe5+ 20. g3 Rxa8 $11)) 13... h6 $14 {[#] ...Nf6 is the strong threat.} 14. Nxe6 $1 fxe6 (14... Bxe6 15. Qxe5 ) 15. Bxe5 Qf7 16. Qxf7+ Rxf7 17. f3 Nf6 18. O-O-O a5 19. Bg6 Rb7 (19... Rfa7 $142) 20. g4 Nh7 (20... Nd7 $16 21. Bf4 Nf8) 21. Bc2 Bd7 22. g5 h5 23. g6 Nf6 24. Rhg1 Bb5 25. Rd2 Rf8 26. e4 Bc6 27. exd5 Bxd5 28. Bd6 Rd8 29. Bh2 {aiming for c4!} Rbd7 30. Rf1 ({White should try} 30. Ba4 $16) 30... Bxa2 31. Rxd7 Rxd7 32. Be5 Bc4 33. Re1 b5 34. b3 Bd5 35. Re3 Bc6 (35... Rd8 $11) 36. Bxf6 gxf6 37. Rxe6 {[%mdl 64] Double Attack} Bxf3 38. Rxf6 {[%mdl 4096] Endgame KRB-KRB} Bg4 39. Ra6 a4 (39... Kg7 $142) 40. bxa4 $16 bxa4 41. Rxa4 ({Resist} 41. Bxa4 Re7 $14) 41... Kg7 42. Ra5 Rc7 (42... c4 $16) 43. Ra6 (43. Kd2 $18 {is the precise move to win.}) 43... Bf3 44. Kd2 (44. Re6 $16) 44... Rd7+ $2 {[%mdl 8192]} ( 44... Re7 $11 {and Black has nothing to worry.}) 45. Ke3 $18 Bd1 (45... Bd5 46. Kf4 Re7) 46. Bf5 Re7+ 47. Kf4 Be2 48. Rc6 c4 49. Rd6 $2 (49. Kg5 Ra7 50. Rc5) 49... Rc7 50. Ke5 Bd3 51. Bxd3 $2 (51. Rd7+ $18 Rxd7 52. Bxd7) 51... cxd3 $11 52. Rxd3 $18 {Threatening Kd4. KR-KR} Rc4 53. Kf5 Rc5+ 54. Ke6 (54. Ke4 { seems wilder.} Rc4+ 55. Ke5 Kxg6 56. Rh3 Ra4 57. Kd5) 54... Rc4 55. Rh3 { Strongly threatening Kd5.} Kxg6 56. Kd5 Rc8 {[%mdl 8192]} (56... Rg4 $11) 57. Rg3+ {White is clearly winning.} Kf5 58. c4 Rd8+ {[#]} 59. Kc5 $1 Rc8+ 60. Kd4 Rd8+ 61. Kc3 Rd1 62. Rg5+ Kf6 63. Rxh5 Rh1 64. Kb4 Kg6 65. Rg5+ Kf6 66. Rg4 Kf5 67. Rd4 Ke5 68. Kc5 {Weighted Error Value: White=0.44/Black=0.47} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "19.5"] [White "Badelka, Olga"] [Black "Bjerre, Jonas Buhl"] [Result "1-0"] [ECO "E51"] [WhiteElo "2418"] [BlackElo "2542"] [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 13,71,-4,-4,0,16,7,7,7,8,14,5,8,23,0,0,-26,-29,-50,-39,-43,0,0,0,0,98, 70,110,107,115,130,191,171,201,167,221,191,246,255,312,293,518,517,505,307,512, 502,667,660,604,520,534,504,1010,983,1253,960,2163,2119,1779,1465]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 b6 7. cxd5 exd5 8. Bd3 {E51: Nimzo-Indian: Rubinstein: 4...0-0 5 Nf3 d5.} a5 9. O-O Ba6 10. Bxa6 {The position is equal.} Nxa6 11. Rc1 {[#]} Re8 $146 ({Predecessor:} 11... Bxc3 12. Bxc3 Ne4 13. Nd2 Nd6 14. b3 Re8 15. Qf3 c6 16. Rfe1 Ne4 17. Nxe4 Rxe4 {1-0 (59) Costachi,M (2471)-Bartel,M (2638) Tornelo INT 2020}) 12. Qc2 Bf8 13. Nb5 { [%CAl Rb5c7]} c5 14. dxc5 bxc5 15. a4 Ne4 16. Rfd1 c4 17. b3 Rc8 18. bxc4 dxc4 (18... Rxc4 $11 19. Qa2 Qc8) 19. Be1 $16 {White now steadily converts the win.} Qb6 {Threatening ...Nb4.} 20. Rd4 Nec5 21. Rxc4 Rcd8 (21... Nb4 $16 22. Bxb4 axb4) 22. Nfd4 $36 {[%mdl 2048] White is on the roll.} Rd5 23. Rb1 {[#] Hoping for Nc3.} Rh5 (23... Qd8 $142 24. Nc6 Qd7) 24. Nf3 Qd8 (24... Rb8 {is a better defense.} 25. h4 Qg6) 25. Nbd4 $18 Bd6 26. Rb5 Nb4 $2 {[#]} (26... Qd7 27. Bxa5 Bf8) 27. Bxb4 axb4 28. Rcxb4 Qc7 $2 (28... Qa8 29. Nf5 Bf8) 29. Rc4 {White is clearly winning.} Bxh2+ 30. Kf1 Bd6 31. Nf5 Bf8 32. g4 Rh1+ (32... Qc6 $142 33. gxh5 Qxf3 34. Rcxc5 Bxc5 35. Rxc5 Qh1+ 36. Ke2 Qxh5+ 37. Kd3 Qf3) 33. Kg2 Ra1 34. Rcxc5 Bxc5 35. Rxc5 ({Weaker is} 35. Qxc5 Qxc5 36. Rxc5 Rxa4 $18) 35... Qd7 36. Qc3 {[%csl Gf5][%CAl Rc3g7] Weighted Error Value: White=0.18/Black=0.52} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "19.6"] [White "Salimova, Nurgyul"] [Black "Praggnanandhaa R"] [Result "0-1"] [ECO "E67"] [WhiteElo "2395"] [BlackElo "2608"] [Annotator "TA"] [PlyCount "82"] [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 19,82,27,41,43,23,0,14,0,0,0,0,0,8,0,0,0,0,0,0,-10,0,-28,19,0,18,0,0, -35,0,0,0,0,0,-14,-8,-40,-11,-76,0,-19,-29,-25,-28,-58,-45,-58,-56,-751,-733, -762,-755,-710,-722,-1052,-1033,-977,-936,-1019,-907,-880,-869,-984,-916,-966, -800]} 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 d6 5. Bg2 O-O 6. O-O Nbd7 7. Nc3 e5 8. Qc2 exd4 9. Nxd4 Re8 10. Rd1 a5 11. b3 {E67: King's Indian: Fianchetto: 6... Nbd7.} Nc5 12. Ba3 Qe7 13. Rac1 {The position is equal.} c6 14. h3 h5 15. e3 { [#]} Nh7 $146 ({Predecessor:} 15... h4 16. g4 Bd7 17. Bxc5 dxc5 18. Nde2 Rab8 19. a4 Rbd8 20. Rd2 Bh6 21. Rd3 Bxg4 22. hxg4 Nxg4 23. Rxd8 Rxd8 {1/2-1/2 (37) Rossi,G (1902)-Cani,G (2140) Milan 2011}) 16. Nce2 Bd7 17. h4 Nf6 18. Nf4 Ng4 19. Qe2 Rad8 20. Qe1 Bc8 21. Rc2 Qc7 22. Rcd2 a4 23. Qf1 Ne4 24. Bxe4 Rxe4 25. Nf3 {[%CAl Ra3d6]} Bf8 26. Ng5 Ree8 27. Bb2 Ne5 28. Qe2 (28. Bd4 $11) 28... Bg7 (28... axb3 $17 29. axb3 Be7) 29. f3 (29. Kg2 {feels hotter.} axb3 30. axb3 Qb6 31. Rxd6 Rxd6 32. Rxd6 Qxb3 33. Nxg6 Bg4 34. Qd2) 29... axb3 30. axb3 Qb6 31. Rxd6 Rxd6 32. Rxd6 Qxb3 33. Ne4 $2 {[%mdl 8192] [#] Now White is beyond hope.} (33. Bxe5 $15 Bxe5 34. Rd3) 33... Qxb2 $3 $19 {[%mdl 576] Deflection. Black is clearly winning.} 34. Qxb2 (34. Rd2 Qc1+) 34... Nxf3+ {[%mdl 64] Discovered Attack} 35. Kf2 Bxb2 36. Kxf3 Bg4+ 37. Kf2 Rxe4 38. Nd3 Be5 39. Rd8+ Kg7 40. c5 Bf6 41. Rb8 Re7 {Weighted Error Value: White=0.59/Black=0.13} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "19.7"] [White "Liang, Awonder"] [Black "Mendonca, Leon Luke"] [Result "1/2-1/2"] [ECO "B23"] [WhiteElo "2592"] [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 14,108,0,-8,0,0,3,-7,-5,-7,0,-2,0,0,0,-26,-27,-22,-11,-31,-41,-50,-38, -38,-22,-21,-14,-36,-11,-32,-33,-25,0,0,14,0,14,0,0,-23,37,16,90,125,118,133, 114,13,34,0,66,35,84,16,16,13,20,18,18,17,18,17,22,8,23,18,26,24,26,0,8,0,0,0, 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. Nc3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. f4 Nc6 6. Nf3 g6 7. O-O Bg7 8. d3 Nh6 {B23: Closed Sicilian: Lines without g3.} 9. h3 f5 10. Be3 O-O 11. Qd2 Rac8 12. Rae1 b6 {[#]} 13. Kh2 $146 ({Predecessor:} 13. Nd1 Nd4 14. c3 Nxf3+ 15. Rxf3 Nf7 16. Rff1 d5 17. e5 Nd8 18. d4 Ne6 {1/2-1/2 (18) Sindarov,J (2383)-Lorparizangeneh,S (2516) Poti 2017}) 13... Nd4 14. Nd1 Nxf3+ 15. Rxf3 e6 16. c3 d5 17. e5 d4 18. Bf2 Rfd8 19. Bh4 Re8 20. Nf2 Kh8 21. Qe2 Nf7 22. g4 dxc3 23. bxc3 Qc6 24. Re3 b5 25. Bf6 b4 26. c4 Rb8 (26... Qc7 $11) 27. h4 $14 b3 (27... Qc7 $11 {remains equal.}) 28. axb3 $16 Rxb3 29. h5 $1 {[%CAl Rh5g6]} Reb8 {[#]} 30. Qf1 ({White should play} 30. gxf5 $1 $16 gxf5 31. Rg3 Bxf6 32. exf6) 30... Rb2 31. Kg3 Kg8 (31... fxg4 $11 32. Nxg4 gxh5 33. Bxg7+ Kxg7) 32. gxf5 exf5 {[#]} 33. Bxg7 (33. hxg6 $1 $16 hxg6 34. Bxg7 Kxg7 35. e6) 33... Kxg7 $11 34. e6 Nh6 35. e7 Re8 $1 36. R1e2 Rxe2 37. Qxe2 Qd7 38. Re6 Qd4 39. hxg6 hxg6 40. Ra6 Ng8 41. Rxa7 (41. Qe6 $5 { [%CAl Re6g6]} Qf6 42. Qxf6+ Nxf6 43. Rxa7 $14) 41... Nf6 {The position is equal.} 42. Qe5 {Hoping for Kf3.} Kf7 43. Rc7 Qxe5 44. fxe5 {[%mdl 4096] Endgame KRN-KRN} Nh5+ 45. Kf3 Rxe7 46. Rxc5 g5 47. d4 {Threatens to win with Ke3.} Ra7 {Black wants to play ...Ra3+.} 48. Nd3 Ra3 49. Rc7+ Ke8 50. Ke2 { [%CAl Re2d2]} Ng3+ 51. Kd2 {And now Nc5 would win.} Nf1+ 52. Ke2 {Strongly threatening Nb4.} Ng3+ 53. Kd2 {aiming for Nc5.} Nf1+ 54. Ke2 {Nb4 is the strong threat.} Ng3+ {Weighted Error Value: White=0.11/Black=0.11} 1/2-1/2 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "19.8"] [White "Khademalsharieh, Sarasadat"] [Black "Zhu, Jiner"] [Result "0-1"] [ECO "A13"] [WhiteElo "2494"] [BlackElo "2462"] [Annotator "ChessBase"] [PlyCount "80"] [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]} Nf6 {[%emt 0:00:00]} 2. c4 {[%emt 0:00:11]} e6 { [%emt 0:00:02]} 3. e3 {[%emt 0:00:02]} d5 {[%emt 0:00:02]} 4. b3 {[%emt 0:00: 12]} c5 {[%emt 0:00:02]} 5. cxd5 {[%emt 0:00:08]} exd5 {[%emt 0:00:02]} 6. Bb2 {[%emt 0:00:09]} Nc6 {[%emt 0:00:05]} 7. Be2 {[%emt 0:00:11]} Bd6 {[%emt 0:00: 05]} 8. O-O {[%emt 0:00:01]} O-O {[%emt 0:00:01]} 9. d4 {[%emt 0:00:01]} cxd4 { [%emt 0:00:04]} 10. Nxd4 {[%emt 0:00:04]} a6 {[%emt 0:00:19]} 11. Nd2 {[%emt 0: 00:04]} Qe7 {[%emt 0:00:22]} 12. Rc1 {[%emt 0:00:04]} Bd7 {[%emt 0:00:02]} 13. N2f3 {[%emt 0:00:10]} Rfe8 {[%emt 0:00:21]} 14. Qc2 {[%emt 0:00:50]} Ne4 { [%emt 0:00:11]} 15. Rfd1 {[%emt 0:00:03]} Rac8 {[%emt 0:01:45]} 16. Nxc6 { [%emt 0:00:10]} bxc6 {[%emt 0:00:02]} 17. Bxa6 {[%emt 0:01:23]} Ra8 {[%emt 0: 00:03]} 18. Bd3 {[%emt 0:00:29]} Rxa2 {[%emt 0:00:19]} 19. Qb1 {[%emt 0:00:06]} Raa8 {[%emt 0:00:56]} 20. h3 {[%emt 0:00:05]} Rab8 {[%emt 0:01:36]} 21. Qc2 { [%emt 0:00:06]} h6 {[%emt 0:00:21]} 22. Ra1 {[%emt 0:00:05]} Nc5 {[%emt 0:00: 15]} 23. Bh7+ {[%emt 0:01:15]} Kh8 {[%emt 0:00:02]} 24. Qc3 {[%emt 0:00:04]} f5 {[%emt 0:00:43]} 25. Bg6 {[%emt 0:00:03]} Rxb3 {[%emt 0:00:08]} 26. Qc2 { [%emt 0:00:42]} Reb8 {[%emt 0:00:04]} 27. Bd4 {[%emt 0:00:14]} Ne4 {[%emt 0:00: 03]} 28. Ra7 {[%emt 0:00:15]} R3b7 {[%emt 0:00:18]} 29. Rxb7 {[%emt 0:00:08]} Rxb7 {[%emt 0:00:00]} 30. Qa2 {[%emt 0:00:02]} Ng5 {[%emt 0:00:36]} 31. Bh5 { [%emt 0:00:50]} Nxf3+ {[%emt 0:00:04]} 32. Bxf3 {[%emt 0:00:02]} Rb8 {[%emt 0: 00:12]} 33. Qa7 {[%emt 0:00:23]} Be8 {[%emt 0:00:04]} 34. Qa1 {[%emt 0:00:11]} Qb7 {[%emt 0:00:17]} 35. Rc1 {[%emt 0:00:04]} Ra8 {[%emt 0:00:10]} 36. Bxg7+ { [%emt 0:00:08]} Kg8 {[%emt 0:00:12]} 37. Qf6 {[%emt 0:00:06]} Ba3 {[%emt 0:00: 07]} 38. Bxh6 {[%emt 0:01:05]} Bxc1 {[%emt 0:00:02]} 39. Qf8+ {[%emt 0:00:02]} Kh7 {[%emt 0:00:02]} 40. Bg5 {[%emt 0:00:41]} Bb2 {[%emt 0:00:32]} 0-1 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "19.9"] [White "Murzin, Volodar"] [Black "Nihal Sarin"] [Result "1-0"] [ECO "C77"] [WhiteElo "2502"] [BlackElo "2620"] [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 13,80,17,22,17,21,14,27,19,33,33,26,43,50,38,42,33,45,32,33,32,83,87,83, 83,100,70,69,75,315,288,334,323,360,206,311,301,332,328,324,269,313,172,172, 149,133,135,142,128,133,121,95,0,0,0,260,264,537,531,527,222,2483,2438,2075, 1848,29992,29993,29993,29994,29999]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d3 d6 6. c3 g6 7. O-O $1 {7.0-0 is better than 7.Nbd2.} Bg7 8. h3 {C77: Ruy Lopez: 3...a6 4 Ba4 Nf6, unusual lines.} O-O 9. Be3 h6 10. Nbd2 {White has an edge.} Nd7 11. Nh2 Ne7 {[#]} 12. f4 $146 ({Predecessor:} 12. d4 exd4 13. Bxd4 f5 14. f4 Nf6 15. Bb3+ Kh7 16. g4 fxe4 17. Bxf6 Bxf6 18. Nxe4 {1/2-1/2 (39) Nestorovic,N (2507)-Slobodjan,R (2464) Germany 2017}) 12... exf4 13. Bxf4 Nc5 14. Bc2 Ne6 15. Be3 f5 16. d4 f4 ({Black should play} 16... d5 $14) 17. Bf2 $16 Qe8 18. Ndf3 Bd7 19. Qd2 g5 20. Rfe1 Ng6 $2 (20... Nd8 $16) 21. e5 $18 d5 22. Qd3 Kh7 23. Ng4 (23. h4 $142) 23... Bb5 (23... h5 {keeps fighting.}) 24. Qd1 Qf7 25. h4 Kg8 26. a4 Be8 27. h5 (27. Qe2 $142) 27... Ne7 28. Nf6+ Bxf6 29. exf6 Qxf6 30. Qd3 {[%csl Gc2][%CAl Rd3h7]} Rf7 31. Ne5 $36 {[%CAl Bf3e5,Be5g4, Bg4h6,Bh6g8][%mdl 2080] Ng4 is the strong threat. Keeping Black busy.} Nf8 32. g3 (32. Nxf7 $16 Bxf7 33. Qf3) 32... Rg7 $11 33. gxf4 Bxh5 $2 {[%mdl 8192]} ( 33... gxf4+ $11 {and Black has nothing to worry.} 34. Kh2 Ne6) 34. Qh3 $18 ({ Weaker is} 34. f5 g4 $14) 34... Bg6 {[#]} (34... Nfg6) 35. Ng4 $1 {[%mdl 64] Double Attack} Qxf4 {[#] Strongly threatening ...h5.} 36. Bg3 $1 Qd2 $2 (36... Qxg4 37. Qxg4 Bxc2 38. Bxc7 Nfg6) 37. Nxh6+ Kh8 {[#]} 38. Be5 $1 Qxc2 (38... Re8 39. Nf7+) 39. Bxg7+ {[%mdl 64] Discovered Attack. White mates.} Kxg7 40. Rxe7+ {[%mdl 64] Double Attack} Kf6 41. Ng8# {Weighted Error Value: White=0.28/ Black=0.54} 1-0 [Event "Gelfand Challenge"] [Site "Chess24"] [Date "2021.06.04"] [Round "19.10"] [White "Abdusattorov, Nodirbek"] [Black "Yip, Carissa"] [Result "1-0"] [ECO "B06"] [WhiteElo "2634"] [BlackElo "2430"] [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 13,75,46,78,48,69,51,96,95,162,95,235,112,283,284,279,277,268,265,316, 284,291,293,291,300,302,220,300,203,220,195,345,339,346,339,303,220,183,164, 172,165,161,135,139,133,142,148,183,175,172,171,170,89,93,98,150,150,295,281, 316,319,311,295,292,291]} 1. d4 g6 2. e4 Bg7 3. Nc3 d6 4. Be3 Nd7 5. Qd2 c6 6. Nf3 b5 7. Bd3 Nb6 8. h4 $5 {[%mdl 4] Exploring less charted territory. B06: Modern Defence.} h6 9. e5 {[#]} Be6 $146 ({Predecessor:} 9... d5 10. h5 g5 11. b3 f5 12. a4 bxa4 13. Nxa4 Nxa4 14. Rxa4 e6 15. Qa5 Qd7 {1-0 (29) Zeller,F (2422)-Lorscheid,G (2323) Germany 2001}) 10. a4 {White is better.} a6 (10... Nc4 $16 11. Qe2 Nxb2) 11. O-O (11. axb5 $18 axb5 12. O-O) 11... Nd5 (11... Nc4 $16 12. Bxc4 bxc4) 12. Be4 (12. axb5 $18 {is more deadly.} axb5 13. Be4) 12... Rc8 $2 (12... b4 $16) 13. axb5 $18 axb5 14. Nxd5 cxd5 15. Bd3 Bd7 16. exd6 exd6 17. Bf4 Ne7 18. Bxd6 O-O 19. h5 g5 20. Ra7 Re8 21. Ne5 Bxe5 (21... Be6 { might work better.}) 22. dxe5 ({Not} 22. Bxe5 Nc6 $18) 22... Nf5 23. Qb4 ({ Weaker is} 23. Bxf5 Bxf5 24. Qxd5 Be6 $18) 23... Nxd6 24. Qxd6 Be6 25. Bxb5 Qxd6 26. exd6 Red8 27. d7 Rb8 28. Bc6 Rxb2 29. Rfa1 $1 $36 {[%mdl 2048] White is in control.} Kf8 30. Ra8 Rbb8 31. Rxb8 Rxb8 {[%mdl 4096] Endgame [#] KRB-KRB } 32. Ra5 (32. Bxd5 $1 $18 {[%mdl 512]} Bxd7 33. Ra7) 32... Ke7 $16 33. Bxd5 Rb1+ (33... Kxd7 $142 34. Bxe6+ Kxe6) 34. Kh2 {Strongly threatening Bxe6.} Bxd7 (34... Kxd7 $16 {keeps fighting.} 35. Bxe6+ Kxe6 36. Ra6+ Ke5 37. Rxh6 Rb4) 35. Ra7 $18 {White has a decisive advantage.} Rb6 {[#]} 36. Bxf7 {[%mdl 512]} Rf6 ( 36... Kd6 37. Bg6) 37. Bd5 Kd6 38. Ra6+ {Weighted Error Value: White=0.23/ Black=0.42} 1-0