[Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "16.1"] [White "Zhu, Jiner"] [Black "Mammadzada, Gunay"] [Result "1-0"] [ECO "B52"] [WhiteElo "2459"] [BlackElo "2443"] [Annotator "TA"] [PlyCount "149"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 11,149,20,31,11,24,14,28,0,8,-3,0,0,0,-16,0,-5,-5,-42,0,0,0,-60,24,-40, -37,-37,-35,-40,-30,-35,-19,-33,-21,-25,-22,-91,-4,-16,15,14,18,0,25,31,37,39, 57,76,64,93,76,0,0,0,0,0,0,0,60,48,51,43,37,54,55,14,14,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,-227,0,0,0,-89,0,-7,0,-14,0,0,0,0,22,0,0,0,22,22,22,22,397,378,350, 266,272,166,489,281,318,301,444,443,460,454,830,777,710,543,822,821,872,817, 841,830,1394,804,772,708,758,0,745,467,1820,1270,29984,1367]} 1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Nxd7 5. O-O Ngf6 6. Qe2 Rc8 7. Rd1 {B52: Sicilian: Moscow Variation with 3...Bd7.} g6 {[#]} 8. b3 $146 ({Predecessor:} 8. c3 Bh6 9. b3 O-O 10. Bb2 Qc7 11. c4 e5 12. Nc3 Rfe8 13. Ne1 Nf8 14. Nc2 Ne6 {1-0 (35) Satyapragyan,S (2416)-Efroimski,M (2255) Douglas 2015}) 8... Bg7 9. Bb2 { White has an edge.} e5 10. c4 Nf8 11. Nc3 Ne6 12. Nd5 Nh5 13. g3 O-O 14. Ne1 Qe8 15. Ng2 f5 16. f3 ({Better is} 16. exf5 $11 gxf5 17. Nh4) 16... Qf7 (16... f4 $15 17. g4 Nf6) 17. Rf1 (17. exf5 $11 gxf5 18. Nh4) 17... f4 $15 18. g4 Nf6 19. h4 Nd7 20. a3 Nb8 21. Ne1 Nc6 22. Nc2 Na5 23. Qd3 (23. Rab1 $11) 23... Rfd8 (23... Bf6 $17 24. g5 (24. Nxf6+ Qxf6 25. g5 Qe7 $15) 24... Bg7) 24. Kg2 $11 a6 25. Rab1 Nc6 26. b4 h6 27. Qe2 Kh7 28. Bc3 Ned4 29. Bxd4 exd4 30. bxc5 dxc5 31. d3 (31. Rfc1 $16) 31... Ne5 32. Rb6 Rc6 33. Rfb1 Rd7 34. Ne1 g5 (34... Bf6 $11) 35. h5 Rxb6 36. Rxb6 Nc6 37. Qb2 Be5 38. Kf2 Bb8 39. Qd2 Ba7 40. Rb1 Ne5 41. Ke2 Qe6 42. Kf1 Kg7 43. Rb3 Rf7 44. Qb2 Qd7 45. Qb1 Qc6 46. Ke2 Qd7 47. Rb2 $2 (47. Kf1 $11 {and White has nothing to worry.}) 47... Kf8 $2 (47... Nxg4 $1 $19 {White must now prevent ...Ne3.} 48. Kd2 (48. fxg4 $2 Qxg4+ 49. Kd2 b5 $19) 48... Ne5) 48. Kf2 Qc6 49. Qd1 (49. Kf1 $11) 49... Ke8 ({Black should play} 49... b5 $17 50. Qc2 Rb7) 50. Kf1 Kd8 51. Rb1 Kc8 52. Nc2 Kb8 53. Na1 Ka8 54. Nb3 Qa4 55. Ke2 Qxa3 56. Qc2 {And now Ra1 would win.} Qa4 {[#]} 57. Nxd4 $1 { [%mdl 64] Discovered Attack} Qd7 {[%mdl 8192] White stays focused until the end.} (57... Qxc2+ $1 $11 58. Nxc2 Nc6) 58. Nf5 $18 Nc6 {Threatens to win with ...Rxf5!} 59. Kf2 Qe6 60. Qb2 {Hoping for Qh8+.} Bb8 $2 (60... Rh7 61. Qc3 Qe5) 61. Qa3 ({Weaker is} 61. Nb6+ Ka7 $18) (61. Qh8 $142 {aiming for Nd6!} Qe5 62. Qc8) 61... Ba7 62. Kg2 $1 Qe5 (62... Rd7 $142 63. Qb2 Qe5 64. Qxe5 Nxe5 65. Nxh6 Nxd3) 63. Nxh6 Rd7 64. Nf5 Nd4 (64... Rh7 $142 65. h6 Qh8) 65. Nxd4 Qxd4 66. Rb3 Qg7 67. Qb2 Qh6 68. Qe5 {White wants to mate with Qe8+.} Bb8 69. Qe8 Rg7 70. Nb6+ Ka7 71. Nc8+ Ka8 72. Nb6+ Ka7 73. Nd7 {[%csl Gd7][%CAl Re8b8]} Bc7 (73... Qd6 $142 74. Nxb8 Qxb8 75. Qxb8+ Kxb8) 74. Nxc5 {[%csl Gc5][%CAl Rb3b7]} b6 {[#]} 75. Ne6 {Weighted Error Value: White=0.25/Black=0.38} (75. Nxa6 $142 $1 {[%mdl 512]} Qd6 {[#]} 76. c5 $1 Qd8 77. Qa4 Kb7 78. Nxc7 Qxc7 79. Rxb6+ Kc8 80. Qa8+ Kd7 81. Rb7) 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "16.2"] [White "Nihal Sarin"] [Black "Murzin, Volodar"] [Result "0-1"] [ECO "D12"] [WhiteElo "2620"] [BlackElo "2478"] [Annotator "TA"] [PlyCount "88"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 15,88,21,29,28,26,26,46,23,31,18,25,7,0,1,7,12,12,0,0,0,0,0,12,0,15,13, 14,0,15,9,23,0,16,0,22,16,22,0,0,-3,0,-46,-42,-43,-38,-147,-156,-155,-142,-275, -248,-242,-245,-482,-468,-506,-498,-496,-308,-425,-396,-381,-408,-427,-425, -564,-563,-997,-993,-29987,-29988,-29988,-29989,-29991,-29992]} 1. Nf3 Nf6 2. c4 c6 3. d4 d5 4. e3 Bf5 5. Nc3 e6 6. Nh4 Be4 7. f3 Bg6 8. Qb3 Qc7 9. Bd2 { D12: Slav Defence: 3 Nf3 Nf6 4 e3 Bf5.} Nbd7 {[%CAl Bb8d7,Bd7f8,Bf8e6][%mdl 32] } 10. cxd5 exd5 11. Rc1 {White is slightly better.} Be7 12. g3 Qb6 {[#]} 13. Nxg6 $146 ({Predecessor:} 13. Qxb6 axb6 14. Nxg6 hxg6 15. a4 Bb4 16. b3 Nf8 17. Bd3 Ne6 18. Rc2 O-O 19. Kf2 {1-0 (37) Henrichs,T (2483)-Ducarmon,Q (2368) Maastricht 2012}) 13... hxg6 14. Kf2 Nf8 15. Qxb6 axb6 16. a3 Ne6 17. Bd3 g5 18. h3 g6 19. Ne2 Kf8 20. Kg2 Kg7 21. Bc3 Rhd8 22. Rhd1 Kg8 23. Rd2 Bf8 24. Rf1 Bg7 25. Rdd1 b5 26. Bb1 Ne8 27. f4 gxf4 28. exf4 Nd6 29. g4 Re8 30. Ng3 { White is now going downhill.} (30. Rde1 $15) 30... Nc4 $17 {...Ne3+ is the strong threat.} 31. Kf3 c5 {[%CAl Rg7d4]} 32. dxc5 (32. Ne2 $17) 32... Bxc3 $19 {[%mdl 64] [#] Overworked Piece} ({Less strong is} 32... Nxb2 33. Bxb2 Bxb2 34. Rxd5 $17) 33. bxc3 Rxa3 34. Ne2 (34. Rfe1 {is the only way for White.}) 34... d4 {[%mdl 64] Deflection} 35. Nxd4 Rxc3+ 36. Kf2 Ne3 37. Nxb5 Nxd1+ {[%mdl 64] Discovered Attack} 38. Rxd1 Rxh3 39. Nd6 Rd8 40. Rc1 {[#]} Nxc5 $1 {[%mdl 512]} 41. Nxf7 (41. Rxc5 Rxd6) 41... Rd2+ 42. Ke1 Rb2 {[%CAl Rh3h1] Black mates.} 43. Bc2 Kxf7 44. Kd2 Nb3+ {[%mdl 64] Double Attack. Weighted Error Value: White=0. 59/Black=0.08} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "16.3"] [White "Badelka, Olga"] [Black "Abdusattorov, Nodirbek"] [Result "0-1"] [ECO "E18"] [WhiteElo "2433"] [BlackElo "2627"] [Annotator "TA"] [PlyCount "88"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 14,88,25,12,21,0,33,14,68,60,66,14,19,-22,10,16,20,27,33,6,13,20,17,18, 87,58,67,60,68,62,114,61,68,63,62,53,82,72,72,-12,-8,-7,-7,-37,305,-52,0,0,0,0, 0,0,0,0,177,168,182,176,180,-8,-8,-8,-8,-8,0,-533,-20,-583,-572,-621,-580, -1502,-1256,-29987,-29986,-29989,-29990]} 1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. d4 e6 5. O-O Be7 6. c4 O-O 7. Nc3 Na6 8. Re1 Ne4 {E18: Queen's Indian: Old Main Line (4 g3 Bb7 5 Bg2 Be7 6 0-0 0-0 7 Nc3).} 9. Bd2 Bf6 $5 {[%mdl 4] [#] A promising side line.} 10. Qc2 $146 ({Predecessor:} 10. Rc1 d6 11. a3 c5 12. d5 Nxd2 13. Qxd2 e5 14. Ne4 Be7 15. b4 Rb8 16. Rb1 {1/2-1/2 (30) Schreiner,P (2471)-Atlas,V (2453) Austria 2014}) 10... Nxc3 (10... Nxd2 $11 11. Qxd2 d5) 11. Bxc3 $14 {Threatens to win with Ng5!} d5 12. Ne5 ({Better is} 12. c5 $14) 12... c5 $11 13. e3 Bxe5 14. dxe5 Nc7 15. Rad1 Qe7 16. f4 Rad8 17. Qa4 a6 18. Qc2 b5 (18... Rd7 $11 {keeps the balance.}) 19. b3 b4 20. Bb2 Ba8 21. cxd5 Nxd5 (21... Bxd5 $14 22. e4 Bb7) 22. Rc1 (22. e4 $16 Nb6 23. Bc1) 22... Rc8 $14 23. e4 Nb6 24. Qd3 c4 25. bxc4 Rfd8 26. Qe2 ({White should try} 26. Bd4 $16) 26... Qc5+ 27. Kh1 a5 28. f5 Nxc4 $2 {[%mdl 8192]} (28... Bb7 $15) 29. f6 $2 (29. Bf1 exf5 30. Qxc4 Bxe4+ 31. Rxe4 Qf8 $16) (29. fxe6 $1 $18 fxe6 30. Bh3 (30. Bf1 Qf8 $18)) 29... Rd2 (29... Bb7 $1 $15) 30. Qxd2 $1 $11 Nxd2 31. Rxc5 Rxc5 32. Rd1 $1 {[%CAl Rd1d2]} Rc2 33. Bc1 gxf6 $2 (33... h6 $11 {and Black has nothing to worry.} 34. Bxd2 Rxa2) 34. exf6 $18 h5 35. Bxd2 {Black must now prevent Bg5. } Rxa2 36. Be3 $2 (36. Bf4 $18 b3 37. Be5) 36... b3 $11 37. Bd4 ({Much worse is } 37. Rd8+ Kh7 $17) 37... a4 38. Bf3 $1 a3 {aiming for ...Rc2.} 39. Be5 $2 { [%mdl 8192] [#]} ({Wrong is} 39. Bxh5 $2 Bxe4+ 40. Kg1 Rg2+ 41. Kf1 Rxh2 $19) ( 39. Rb1 $1 $11 b2 40. Kg2) 39... b2 $2 (39... Bc6 $1 $19 40. Rb1 (40. Bxh5 $2 Bxe4+ 41. Kg1 Rg2+ 42. Kf1 b2 $19) 40... b2) 40. Rb1 $2 {[%mdl 8192]} (40. Kg1 $11 {and White stays safe.}) 40... Bc6 $19 41. Kg1 {[#] and the idea Kf1 leaves White hopeful.} Bb5 42. Bd1 {Strongly threatening Bb3.} Bd3 $1 {[%csl Bb1,Be4][%mdl 64] Double Attack} 43. Bb3 Bxb1 44. Bxa2 Bxa2 {Weighted Error Value: White=0.95/Black=0.58} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "16.4"] [White "Lei, Tingjie"] [Black "Khademalsharieh, Sarasadat"] [Result "1-0"] [ECO "E04"] [WhiteElo "2505"] [BlackElo "2494"] [Annotator "Shahid"] [PlyCount "53"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] [TimeControl "600+5"] {[%evp 0,53,25,26,18,-17,3,-24,-11,-6,2,-8,14,14,33,9,24,19,42,56,43,38,25,12, 21,42,48,50,50,57,64,56,37,57,41,22,84,48,42,42,78,42,77,50,93,83,186,161,260, 259,434,422,568,590,621,620]} 1. d4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 2. c4 {[%emt 0:00:00]} e6 {[%emt 0:00:00]} 3. g3 {[%emt 0:00:00]} d5 {[%emt 0:00:02]} 4. Bg2 {[%emt 0:00:02]} Bb4+ {[%emt 0:00:02]} 5. Bd2 {[%emt 0:00:03]} a5 { [%emt 0:00:01]} 6. Nf3 {[%emt 0:00:15]} dxc4 {[%emt 0:00:40]} 7. Qc2 {[%emt 0: 00:26]} c5 {[%emt 0:00:57]} 8. Qxc4 {[%emt 0:00:42]} Bxd2+ {[%emt 0:01:21]} 9. Nbxd2 {[%emt 0:00:04]} cxd4 {[%emt 0:00:01]} 10. Nxd4 {[%emt 0:00:01]} O-O { [%emt 0:00:02]} 11. N2f3 {[%emt 0:01:32]} Qb6 {[%emt 0:00:46]} 12. O-O { [%emt 0:00:26]} Bd7 {[%emt 0:01:15]} 13. Ne5 {[%emt 0:00:44]} Rc8 {[%emt 0:00: 03]} 14. Qd3 {[%emt 0:00:11]} Be8 {[%emt 0:00:07]} 15. Rfd1 {[%emt 0:02:14]} Nbd7 {[%emt 0:02:06]} 16. Nc4 {[%emt 0:00:42]} Qa6 {[%emt 0:00:09]} 17. Rac1 { [%emt 0:00:05]} Nc5 {[%emt 0:00:46]} 18. Qf3 {[%emt 0:00:27]} Nce4 {[%emt 0:00: 22]} 19. Qd3 {[%emt 0:00:39]} Nc5 {[%emt 0:00:15]} 20. Qa3 {[%emt 0:00:07]} a4 {[%emt 0:00:23]} 21. Rc2 {[%emt 0:01:28]} Rab8 {[%emt 0:00:11]} 22. Rdc1 { [%emt 0:00:07]} Nd5 $2 {[%emt 0:01:31]} (22... Nce4) 23. Ne5 {[%emt 0:00:19]} b6 {[%emt 0:00:31]} (23... Qd6 24. Nxf7 Bxf7 25. Rxc5) 24. b4 $18 {[%emt 0:00: 17]} Nd7 {[%emt 0:00:02]} 25. Nec6 {[%emt 0:00:15]} N7f6 {[%emt 0:00:19]} 26. b5 {[%emt 0:00:07]} Qb7 {[%emt 0:00:14]} 27. e4 {[%emt 0:00:01]} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "16.5"] [White "Yip, Carissa"] [Black "Abdumalik, Zhansaya"] [Result "0-1"] [ECO "A34"] [WhiteElo "2430"] [BlackElo "2472"] [Annotator "TA"] [PlyCount "110"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 12,110,40,47,52,46,44,39,63,28,49,49,54,45,99,35,47,22,0,-23,49,32,37, 35,59,54,62,5,43,50,66,0,0,0,0,-205,-208,-192,-103,-443,-414,-1071,-564,-576, -571,-570,-567,-543,-535,-547,0,-756,-738,-901,-678,-671,-667,-656,-643,-779, -774,-876,-768,-821,-806,-1197,-1175,-1227,-1214,-1282,-1263,-5197,-4794,-6399, -6387,-1698,-1164,-1104,-1084,-1188,-1185,-1591,-1090,-1508,-1079,-1132,-1138, -5285,-929,-1277,-758,-1281,-1240,-1027,-680,-640,-630,-589,-530,-634,-631]} 1. e4 c5 2. Nf3 a6 3. c4 e6 4. Nc3 b6 5. d4 cxd4 6. Nxd4 Bb7 7. Bd3 Qc7 {A34: Symmetrical English: 2 Nc3, lines with ...d5.} 8. O-O Nf6 9. Qe2 d6 {White is slightly better.} 10. Kh1 Nbd7 11. f4 Be7 12. Bd2 g6 (12... O-O $14) 13. b4 ({ Better is} 13. Rae1 $16) 13... Rc8 {[#]} 14. f5 $146 ({Predecessor:} 14. Rae1 O-O 15. a3 Rfe8 16. f5 exf5 17. exf5 d5 18. fxg6 hxg6 19. Nxd5 Bxd5 20. cxd5 { 1-0 (31) Kozirev,A (2343)-Fesenko,V (2221) Cheliabinsk 2010}) 14... gxf5 { [#] aiming for ...Ne5.} 15. exf5 (15. Nd5 $5 Qd8 16. Nxe7 Qxe7 17. exf5 $11) 15... e5 (15... Rg8 $1 $11 16. Rf2 (16. fxe6 Bxg2+ 17. Qxg2 Rxg2 $15) 16... e5) 16. Nf3 Rg8 17. Rac1 Qb8 18. Ng5 Qa8 19. Nge4 (19. Rg1 $14) 19... Nxe4 20. Bxe4 ({Don't play} 20. Nxe4 Nf6 $15) 20... Nf6 21. Bxb7 (21. Bf3 $14) 21... Qxb7 $11 22. Be3 Rxc4 23. Rc2 $2 (23. b5 $11 {and White stays safe.}) 23... Rcg4 $19 24. Rg1 Rh4 $40 {[%mdl 128] Black is out for blood.} (24... b5 $19 25. a3 h5) 25. b5 $2 {[%mdl 8192]} (25. Rgc1 $17) 25... Ng4 {[%csl Gg4][%CAl Rh4h2]} 26. Rgc1 (26. Rf1 $142 Rxh2+ 27. Kg1 Nxe3 28. Kxh2 Rxg2+ 29. Qxg2 Nxg2 30. Rxg2) 26... Rxh2+ 27. Kg1 Nxe3 28. Kxh2 Rxg2+ 29. Qxg2 Nxg2 30. Rxg2 {intending bxa6.} a5 ( 30... Qf3 $19 31. Rcc2 a5) 31. Rd1 $2 {[%mdl 8192]} (31. Rg8+ $11 Bf8 32. Ne2) 31... Qf3 {[%mdl 64] [#] Double Attack. Black is clearly winning.} 32. Ne2 Qh5+ 33. Kg1 Bg5 {( -> ...Be3+)} 34. Rd3 h6 35. Nc3 Qh4 36. Nd5 Qe1+ 37. Kh2 Qe4 38. Rd1 Qxf5 39. Rgg1 Qc2+ 40. Kh3 Qxa2 41. Nxb6 Qb3+ 42. Kg4 Qe6+ 43. Kg3 Bf4+ 44. Kf2 Qa2+ 45. Kf1 Bg5 46. Nd5 Kd7 47. b6 Kc6 48. Rg3 Bh4 49. Rc3+ Kd7 {[%csl Gh4][%CAl Ra2f2]} 50. Kg1 Qf2+ 51. Kh1 Bg3 {[%csl Gg3][%CAl Rf2h2]} 52. Nf6+ Qxf6 53. Rxg3 Qh4+ 54. Kg2 Qb4 55. Rf3 f5 {Weighted Error Value: White=1.01/ Black=0.51} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "16.6"] [White "Praggnanandhaa R"] [Black "Mendonca, Leon Luke"] [Result "1-0"] [ECO "D12"] [WhiteElo "2608"] [BlackElo "2549"] [Annotator "TA"] [PlyCount "101"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 15,101,29,25,0,59,47,83,67,69,20,46,40,66,63,64,56,99,89,122,122,151, 140,152,102,92,91,145,85,162,167,191,164,171,154,201,181,193,94,100,92,93,99, 93,62,64,64,71,62,80,58,58,58,70,60,171,169,460,466,550,543,691,702,712,712, 709,706,701,691,651,473,727,678,2193,1946,1830,1536,1844,1748,1676,1453,1841, 1802,1719,1673,1472,1311,1193,1157]} 1. d4 Nf6 2. c4 c6 3. Nf3 d5 4. e3 Bf5 5. Nc3 e6 6. Nh4 Be4 7. f3 Bg6 8. Qb3 Qc7 9. cxd5 {D12: Slav Defence: 3 Nf3 Nf6 4 e3 Bf5.} Nxd5 (9... cxd5 $11 10. Bd2 (10. Nxg6 hxg6 11. Bd2 Nc6 $11) 10... Nc6) 10. g3 Be7 11. Nxg6 {White is better.} hxg6 {[#]} 12. Kf2 $146 (12. e4 $5 { [%CAl Re4d5]} Nf6 13. Be2 $14) ({Predecessor:} 12. e4 Nxc3 13. bxc3 Nd7 14. Kf2 Rb8 15. a4 g5 16. Be2 e5 17. Be3 O-O 18. Rhd1 {1-0 (67) Matlakov,M (2653) -Dubov,D (2614) Loo 2013}) 12... Nd7 13. e4 N5f6 14. Kg2 O-O 15. Be2 c5 16. Bf4 Qa5 17. d5 e5 18. Bg5 Qc7 19. Rac1 a6 20. a4 Bd6 ({Black should try} 20... Rfc8 ) 21. Nb1 (21. Bd2 $142) 21... Rab8 (21... Rfb8 $16) 22. Na3 $18 Rfc8 23. Rc2 Ne8 24. h4 Ndf6 25. Rhc1 Be7 26. a5 (26. Qe3 $18 {and White stays clearly on top.}) 26... Qxa5 $16 27. Nc4 {[%mdl 64] [#] Double Attack} Qc7 28. Nb6 Rd8 29. Be3 {[%CAl Re3c5]} Nd7 30. Nxd7 Qxd7 31. Qb6 Rdc8 32. Bf1 {[%mdl 1024] White has strong compensation.} Bd8 33. Qb3 Be7 34. Kh2 {aiming for Bh3.} b5 { White leaves nothing to chance now.} (34... Rc7 $14) 35. Bh3 $18 Qc7 {[#]} ( 35... f5) 36. Bxc8 {[%CAl Re3c5] White is clearly winning.} Rxc8 37. Bxc5 Bxc5 38. Rxc5 Qxc5 39. Rxc5 Rxc5 {[%mdl 4096] Endgame KQ-KRN} 40. Qa3 Rc2+ 41. Kh3 Nf6 42. d6 Rf2 (42... Kh7 $142 43. Qxa6 b4) 43. Qxa6 Rxf3 44. Qc8+ Kh7 45. d7 Nxd7 46. Qxd7 {KQ-KR} b4 47. Qe7 b3 48. Qxe5 Rd3 49. Qb5 Re3 50. Qc4 f6 51. Kg2 {Weighted Error Value: White=0.21/Black=0.44} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "16.7"] [White "Salimova, Nurgyul"] [Black "Keymer, Vincent"] [Result "0-1"] [ECO "E11"] [WhiteElo "2397"] [BlackElo "2591"] [Annotator "ChessBase"] [PlyCount "64"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] [TimeControl "600+5"] {[%evp 0,51,18,25,26,20,27,6,6,-19,21,20,16,-13,3,-4,26,4,18,18,75,95,94,93,98, 83,93,59,60,58,54,55,46,25,21,-106,-138,-119,-101,-105,-78,-102,-55,-182,-41, -220,-235,-324,-329,-329,-349,-349,-360,-351]} 1. d4 {[%emt 0:00:00]} Nf6 { [%emt 0:00:00]} 2. Nf3 {[%emt 0:00:00]} e6 {[%emt 0:00:00]} 3. c4 {[%emt 0:00: 04]} d5 {[%emt 0:00:00]} 4. g3 {[%emt 0:00:01]} Bb4+ {[%emt 0:00:02]} 5. Bd2 { [%emt 0:00:02]} Be7 {[%emt 0:00:02]} 6. Bg2 {[%emt 0:00:06]} O-O {[%emt 0:00: 01]} 7. O-O {[%emt 0:00:20]} c6 {[%emt 0:00:01]} 8. Bf4 {[%emt 0:00:07]} dxc4 { [%emt 0:00:04]} 9. Ne5 {[%emt 0:00:21]} b5 {[%emt 0:00:01]} 10. Nxc6 {[%emt 0: 01:10]} Nxc6 {[%emt 0:00:03]} 11. Bxc6 {[%emt 0:00:01]} Ba6 {[%emt 0:00:00]} 12. Bxa8 {[%emt 0:01:04]} Qxa8 {[%emt 0:00:00]} 13. Nd2 {[%emt 0:01:04]} h6 { [%emt 0:01:04]} 14. Nf3 {[%emt 0:00:07]} Qd5 {[%emt 0:00:05]} 15. h4 {[%emt 0: 01:12]} Bb7 {[%emt 0:00:17]} 16. Re1 {[%emt 0:01:23]} Ne4 {[%emt 0:00:11]} 17. h5 {[%emt 0:01:15]} Qxh5 {[%emt 0:00:16]} 18. Kg2 {[%emt 0:00:01]} Qd5 { [%emt 0:01:07]} 19. Rh1 {[%emt 0:00:22]} Rd8 {[%emt 0:00:05]} 20. Qc2 {[%emt 0: 01:34]} Qf5 {[%emt 0:00:44]} 21. Qc1 {[%emt 0:00:27]} Ng5 {[%emt 0:00:34]} 22. Bxg5 {[%emt 0:00:47]} hxg5 {[%emt 0:00:02]} 23. Qg1 {[%emt 0:00:16]} g4 { [%emt 0:00:45]} 24. Qh2 {[%emt 0:00:01]} gxf3+ {[%emt 0:00:01]} 25. Kg1 { [%emt 0:00:02]} f6 {[%emt 0:00:03]} 26. e3 {[%emt 0:00:04]} Be4 {[%emt 0:00:17] } 27. Qh4 {[%emt 0:00:07]} Kf7 {[%emt 0:00:12]} 28. Rc1 {[%emt 0:00:12]} Bd3 { [%emt 0:00:18]} 29. a3 {[%emt 0:00:05]} a5 {[%emt 0:00:06]} 30. g4 {[%emt 0:00: 02]} Qg6 {[%emt 0:00:08]} 31. Qg3 {[%emt 0:00:04]} Bd6 {[%emt 0:00:02]} 32. Qh4 {[%emt 0:00:12]} Rh8 {[%emt 0:00:04]} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "16.9"] [White "Liang, Awonder"] [Black "Bjerre, Jonas Buhl"] [Result "1-0"] [ECO "B23"] [WhiteElo "2592"] [BlackElo "2550"] [Annotator "TA"] [PlyCount "73"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,73,0,11,-10,-5,-16,0,2,4,0,0,0,0,-76,-63,-145,-42,-84,-58,-41,-51,-62, -15,-20,0,0,0,0,0,0,0,-186,-34,-30,-27,-34,0,0,0,0,0,0,0,0,108,83,111,114,102, 8,1,10,62,78,335,329,312,325,309,291,483,509,443,481,598,383]} 1. e4 c5 2. Nc3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Qd2 Nf6 6. b3 {B23: Closed Sicilian: Lines without g3.} e6 7. Bb2 d5 8. exd5 {The position is equal.} exd5 9. O-O-O { [%CAl Rc3d5]} Be6 10. Nf3 Qa5 11. Kb1 (11. Bb5 $11) 11... Bb4 $17 {[#]} 12. Qd3 $146 {[#]} ({Predecessor:} 12. Nd4 Ne4 13. Nxe4 Bxd2 14. Nd6+ Kf8 15. Nxb7 Qb6 16. Nxc6 Qxc6 17. Ba3+ Kg8 18. Nc5 {0-1 (39) Kairbekova,A (2065)-Nurmanova,A (2026) Almaty 2020}) 12... O-O (12... Ng4 $1 $17 13. Qd2 (13. Nxd5 $2 O-O-O $19 ) 13... O-O) 13. Nd4 Rac8 {Hoping for ...Nxd4.} 14. Nxc6 Rxc6 15. Nb5 Rfc8 16. a3 Be7 ({Don't play} 16... Rxc2 $6 17. axb4 Qxb4 18. Nd4 $16 (18. Nxa7 $2 Bf5 $19)) 17. b4 Qa4 {...Ne4 is the strong threat.} 18. Qb3 $1 {[%CAl Rb3a4]} Qxb3 19. cxb3 Ne4 20. Bd4 {[#]} (20. Nxa7 $11 {and White stays safe.} Nxf2 {[%mdl 64] Double Attack} 21. Nxc6 Rxc6 22. Bb5) 20... Bf6 $2 (20... Rc2 $1 $19 21. Bc4 Rxf2) 21. Bd3 $1 $15 {[%CAl Rd3e4] Black must now prevent Bxe4.} Bxd4 22. Bxe4 Bxf2 (22... Bf6 {with more complications.} 23. Bd3 Rd8 24. Rc1 g6 25. Nxa7 Rxc1+ 26. Rxc1 Bd4) 23. Bxd5 Bxd5 24. Rxd5 g6 25. Rf1 Bb6 26. Rd7 a6 (26... Be3 $11) 27. Nd6 $16 {[%mdl 64] Double Attack} Rf8 28. Nxf7 {Threatening mate with Nh6+.} Be3 29. Rf3 (29. Rxb7 $16 Rc3 30. Rd7) 29... Rc1+ $11 30. Kb2 Rfc8 31. Rd8+ $14 Kg7 $2 {[%mdl 8192] A mistake that costs the game.} (31... Rxd8 $16 { was called for.} 32. Nxd8 Re1) 32. Rxc8 $18 Rxc8 33. Rxe3 Kxf7 34. Rc3 Re8 ( 34... Rb8 {was necessary.} 35. Rc7+ Ke6 36. Rxh7 b5) 35. Rc7+ {White is clearly winning.} Kf6 36. Rxb7 h5 37. Rc7 {Weighted Error Value: White=0.18/ Black=0.52} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "16.10"] [White "Yoo, Christopher Woojin"] [Black "Shuvalova, Polina"] [Result "1-0"] [ECO "D30"] [WhiteElo "2455"] [BlackElo "2476"] [Annotator "TA"] [PlyCount "65"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,64,0,0,-18,0,0,2,0,0,0,0,-27,-19,-18,-20,-12,-14,-30,46,18,44,-7,25,7, 57,63,108,108,97,62,69,62,72,68,62,46,431,200,453,205,216,200,208,207,178,158, 948,957,29981,29982,29982,29983,29983,29984,29981,29961,29999]} 1. d4 Nf6 2. Nf3 e6 3. c4 d5 4. Bg5 dxc4 5. Qa4+ Nbd7 6. Nc3 {D30: Queen's Gambit Declined: Systems without Nc3.} Be7 7. e4 O-O 8. Qxc4 {The position is equal.} h6 9. Bf4 c5 {[#]} 10. dxc5 $146 ({Predecessor:} 10. O-O-O cxd4 11. Bc7 Qe8 12. Nxd4 Nb6 13. Bxb6 axb6 14. e5 Nd5 15. Nxd5 exd5 16. Qxd5 {1/2-1/2 (78) Lalith,B (2541) -Teske,H (2512) Chennai 2013}) 10... Bxc5 11. Be2 a6 12. e5 {[#]} b5 $1 13. Qd3 {[#]} Nh7 (13... b4 $1 $11 14. exf6 Qxf6 {[%mdl 64] Double Attack}) 14. O-O Bb7 15. Rfd1 (15. Ne4 $14) 15... Nb6 16. Qc2 Qe7 17. Bd3 Ng5 18. Bxg5 hxg5 19. Be4 g4 20. Bxb7 Qxb7 21. Ng5 {[%csl Gg5][%CAl Rc2h7]} g6 22. Qe2 {Nce4 is the strong threat.} Nc4 $2 {[%mdl 8192]} ({Better is} 22... Qb8 $14) 23. Qxg4 (23. Nce4 $142 Bb4 {[#]} 24. Rd7 $3 {[%mdl 512]}) 23... Kg7 $2 (23... Be7 {might work better.} 24. Nxe6 Qc8 {[%mdl 64] Pin}) 24. Nce4 $40 {[%mdl 128] Black is in trouble.} (24. Qh4 $142 {[%csl Gg5][%CAl Rh4h7]} Rh8 25. Qf4 Nxb2 26. Nce4) 24... Be7 $18 25. Qh4 {[%csl Gg5][%CAl Rh4h7]} Rh8 26. Qf4 Bxg5 27. Nxg5 { Hoping for Qf6+.} Rh5 $2 {Loses the game.} (27... Qe7 $16 28. b3 Nb6) 28. Qf6+ Kg8 29. Rd8+ {White mates.} Rxd8 30. Qxd8+ Kg7 31. Qf6+ Kh6 32. Nxf7+ Kh7 33. Qh8# {Weighted Error Value: White=0.32/Black=0.75} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "17.1"] [White "Shuvalova, Polina"] [Black "Zhu, Jiner"] [Result "0-1"] [ECO "A18"] [WhiteElo "2476"] [BlackElo "2459"] [Annotator "TA"] [PlyCount "126"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 10,125,28,18,27,18,26,6,10,31,9,0,37,29,26,30,30,16,8,-31,-25,-65,-16, -113,-99,-101,-121,-122,-111,-117,-134,-124,-81,-77,0,0,0,0,0,0,0,0,0,0,0,-91, 0,0,0,0,0,0,0,0,0,0,0,0,0,-1016,-967,-958,-911,-755,-727,-930,-918,-1630,-820, -1952,-1321,-9244,-5493,-29967,-2014,-29978,-29974,-29974,-29975,-29975,-29975, -29984,-29985,-29985,-29986,-29986,-29987,-29987,-29988,-29988,-29989,-29989, -29990,-29990,-29989,-29989,-29990,-29992,-29993,-29993,-29993,-29995,-29993, -29993,-29993,-29993,0,-29993,-29993,-29993,-29994,-29996,-29997,-29997,-29998, -29998,-29999,-29999]} 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. cxd5 exd5 5. e5 Ne4 6. Nf3 Bf5 {A18: English Opening: Flohr-Mikenas System (1 c4 Nf6 2 Nc3 e6 3 e4).} 7. Be2 c5 8. d4 Nc6 {The position is equal.} 9. O-O c4 10. Nxe4 {[#]} dxe4 $146 ({Predecessor:} 10... Bxe4 11. Nd2 Bf5 12. g4 Be6 13. b3 h5 14. Nf3 cxb3 15. Qxb3 hxg4 16. Qxb7 gxf3 {1/2-1/2 (52) Liu,Z (2386)-Svetushkin,D (2528) Paracin 2019}) 11. Ng5 h6 {[#]} 12. Nxf7 Kxf7 13. Bxc4+ Kg6 14. Be3 (14. g4 {looks sharper.} Bc8 15. Be3 Na5 16. Be2 Be6 17. Qc2) 14... Kh7 $1 15. a3 Be7 16. b4 ( 16. f4 $1 $11) 16... a6 17. Rc1 Rf8 18. Qd2 Bg5 19. Qb2 Bxe3 20. fxe3 Qe7 21. Bd5 Rac8 (21... Qd7 $17 22. Qa2 Ne7) 22. Rxf5 $11 {[%mdl 64] Remove Defender} Rxf5 23. Bxe4 Qg5 24. Bxf5+ Qxf5 25. d5 Ne7 26. Rxc8 Nxc8 27. Qd4 (27. h3 $11 { keeps the balance.}) 27... Ne7 (27... Qb1+ $17 28. Kf2 Ne7) 28. h3 Qb1+ 29. Kh2 Qf5 30. a4 {White wants to play b5.} Kg8 31. b5 axb5 32. axb5 {d6 is the strong threat.} Ng6 33. e6 {Black must now prevent d6.} Qe5+ 34. Qxe5 $4 { [%mdl 8192] White is on the road to losing.} (34. g3 $11) 34... Nxe5 {[%mdl 4096] Endgame KN-KP} 35. Kg3 Kf8 36. Kf4 {[#]} Nc4 $1 37. e4 Ke7 38. e5 {[#]} Na3 $1 {[%CAl Ra3b5]} 39. Kf5 Nxb5 40. h4 h5 41. g3 b6 (41... Nd4+ $142 42. Ke4 Ne2 43. Kf3 Nc3 44. d6+ Kxe6 45. Ke3 Na4 46. Kf3 Nc5 47. g4 hxg4+ 48. Kxg4 Kxe5 49. Kf3 Kd4 50. Ke2 Kc3 51. h5 b5 52. Ke3 b4 53. h6 gxh6 54. d7 Nxd7 55. Ke4 b3 56. Kd5 b2 57. Ke6 Nc5+ 58. Kd6 Kd4 59. Ke7 b1=Q 60. Kf6 Nd7+ 61. Ke7 Qh7+ 62. Kd8 Ne5 63. Ke8 Qf7+ 64. Kd8 Qd7#) 42. g4 hxg4 43. Kxg4 Nc3 44. d6+ Kxe6 { KN-K3P} 45. Kg5 b5 46. Kg6 b4 47. Kxg7 b3 48. d7 Kxd7 {KN-KPP} 49. h5 b2 50. h6 b1=Q 51. h7 Qg1+ 52. Kf7 Qh2 53. Kg8 Qg3+ 54. Kf7 Qf4+ 55. Kg8 Qg5+ 56. Kf7 Qf5+ 57. Kg7 Qg5+ 58. Kf7 $1 Qh6 {Black mates.} 59. e6+ Kd6 60. Kg8 Qg6+ 61. Kh8 Nd5 62. e7 Qf6+ {[%mdl 64] Double Attack} 63. Kg8 Nxe7# {Weighted Error Value: White=0.64/Black=0.22} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "17.2"] [White "Bjerre, Jonas Buhl"] [Black "Yoo, Christopher Woojin"] [Result "1-0"] [ECO "A50"] [WhiteElo "2550"] [BlackElo "2455"] [Annotator "ChessBase"] [PlyCount "97"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] [TimeControl "600+5"] {[%evp 0,70,20,20,20,6,13,22,37,12,49,39,41,23,35,31,24,28,24,18,27,25,32,-2, 31,20,3,-7,7,-1,6,10,10,-31,-24,-31,-31,-18,4,-97,-90,-78,-78,-77,-57,-114,-46, 0,0,-149,-169,-220,-228,-207,24,24,102,117,124,133,278,293,319,319,1328,301, 350,1516,1494,808,865,856,899]} 1. d4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 2. c4 {[%emt 0:00:00]} b6 {[%emt 0:00:01]} 3. Nf3 {[%emt 0:00:12]} Bb7 {[%emt 0: 00:04]} 4. g3 {[%emt 0:00:01]} g6 {[%emt 0:00:26]} 5. Bg2 {[%emt 0:00:15]} Bg7 {[%emt 0:00:03]} 6. O-O {[%emt 0:00:08]} O-O {[%emt 0:00:01]} 7. Nc3 {[%emt 0: 00:51]} Ne4 {[%emt 0:00:04]} 8. Nxe4 {[%emt 0:00:22]} Bxe4 {[%emt 0:00:09]} 9. Bf4 {[%emt 0:00:09]} d6 {[%emt 0:00:56]} 10. Qd2 {[%emt 0:00:13]} e6 {[%emt 0: 00:03]} 11. Bg5 {[%emt 0:00:36]} Qe8 {[%emt 0:02:10]} 12. Bh6 {[%emt 0:00:14]} Nd7 {[%emt 0:00:16]} 13. Qe3 {[%emt 0:00:38]} Bb7 {[%emt 0:00:14]} 14. Rfd1 { [%emt 0:00:39]} Nf6 {[%emt 0:00:43]} 15. Bxg7 {[%emt 0:00:03]} Kxg7 {[%emt 0: 00:02]} 16. c5 {[%emt 0:00:24]} Qb5 {[%emt 0:00:48]} 17. a4 {[%emt 0:01:07]} Qb4 {[%emt 0:00:23]} 18. Rdc1 {[%emt 0:01:03]} Bd5 {[%emt 0:01:26]} 19. Nd2 { [%emt 0:00:42]} Bxg2 {[%emt 0:00:13]} 20. Kxg2 {[%emt 0:00:15]} Nd5 {[%emt 0: 00:57]} 21. Qd3 {[%emt 0:00:03]} dxc5 {[%emt 0:00:16]} 22. Rc4 {[%emt 0:00:48]} Qxb2 {[%emt 0:00:12]} 23. Rb1 {[%emt 0:00:10]} Qa2 {[%emt 0:00:03]} 24. e4 { [%emt 0:00:26]} Nf6 {[%emt 0:00:27]} 25. d5 {[%emt 0:01:06]} exd5 {[%emt 0:00: 29]} 26. exd5 {[%emt 0:00:02]} Rad8 {[%emt 0:00:12]} 27. Qc3 {[%emt 0:00:13]} Rxd5 {[%emt 0:00:10]} 28. Rb2 {[%emt 0:00:33]} Qa1 {[%emt 0:00:43]} 29. Ne4 { [%emt 0:00:01]} Rd1 {[%emt 0:00:19]} 30. Nxf6 {[%emt 0:00:34]} Rg1+ {[%emt 0: 00:04]} 31. Kh3 {[%emt 0:00:04]} Kh8 {[%emt 0:00:35]} 32. Nd7+ {[%emt 0:00:11]} Kg8 {[%emt 0:00:01]} 33. Nf6+ {[%emt 0:00:11]} Kh8 {[%emt 0:00:02]} 34. Nxh7+ { [%emt 0:00:03]} f6 {[%emt 0:00:04]} 35. Nxf8 {[%emt 0:00:06]} Qf1+ {[%emt 0:00: 06]} 36. Kh4 {[%emt 0:00:06]} g5+ {[%emt 0:00:12]} 37. Kh5 {[%emt 0:00:16]} Kg7 {[%emt 0:00:05]} 38. Ne6+ {[%emt 0:00:07]} Kf7 {[%emt 0:00:04]} 39. Nxg5+ { [%emt 0:00:06]} Kg7 {[%emt 0:00:04]} 40. Ne6+ {[%emt 0:00:06]} Kf7 {[%emt 0:00: 01]} 41. Nf4 {[%emt 0:00:12]} Qd1+ {[%emt 0:00:05]} 42. f3 {[%emt 0:00:03]} Qd8 {[%emt 0:00:06]} 43. Kg4 {[%emt 0:00:06]} Qd7+ {[%emt 0:00:03]} 44. Kh4 { [%emt 0:00:03]} Qf5 {[%emt 0:00:01]} 45. g4 {[%emt 0:00:06]} Qg5+ {[%emt 0:00: 10]} 46. Kh3 {[%emt 0:00:01]} f5 {[%emt 0:00:09]} 47. Nh5 {[%emt 0:00:03]} fxg4+ {[%emt 0:00:08]} 48. fxg4 {[%emt 0:00:01]} Rf1 {[%emt 0:00:07]} 49. Qg3 { [%emt 0:00:05]} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "17.3"] [White "Gukesh D"] [Black "Liang, Awonder"] [Result "1-0"] [ECO "E99"] [WhiteElo "2578"] [BlackElo "2592"] [Annotator "ChessBase"] [PlyCount "119"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] [TimeControl "600+5"] {[%evp 0,80,20,20,23,6,18,37,36,42,47,56,44,43,61,28,63,59,54,68,50,51,58,49, 54,32,88,90,96,80,107,79,90,64,136,125,131,100,138,89,95,74,150,99,136,119,130, 117,142,92,78,117,142,211,287,335,335,335,335,355,386,184,426,263,263,258,269, 269,310,137,114,186,205,86,88,102,102,121,119,17,9,43,329]} 1. d4 {[%emt 0:00: 00]} Nf6 {[%emt 0:00:00]} 2. c4 {[%emt 0:00:01]} g6 {[%emt 0:00:00]} 3. Nc3 { [%emt 0:00:01]} Bg7 {[%emt 0:00:00]} 4. e4 {[%emt 0:00:02]} d6 {[%emt 0:00:00]} 5. Nf3 {[%emt 0:00:08]} O-O {[%emt 0:00:01]} 6. Be2 {[%emt 0:00:02]} e5 { [%emt 0:00:01]} 7. O-O {[%emt 0:00:10]} Nc6 {[%emt 0:00:02]} 8. d5 {[%emt 0:00: 02]} Ne7 {[%emt 0:00:01]} 9. Ne1 {[%emt 0:00:01]} Nd7 {[%emt 0:00:11]} 10. Nd3 {[%emt 0:00:02]} f5 {[%emt 0:00:04]} 11. f3 {[%emt 0:00:02]} f4 {[%emt 0:00:04] } 12. b4 {[%emt 0:00:01]} g5 {[%emt 0:00:28]} 13. c5 {[%emt 0:00:06]} Ng6 { [%emt 0:00:02]} 14. a4 {[%emt 0:00:34]} Rf7 {[%emt 0:00:05]} 15. a5 {[%emt 0: 00:42]} Bf8 {[%emt 0:00:19]} 16. c6 {[%emt 0:00:37]} Nf6 {[%emt 0:00:30]} 17. b5 {[%emt 0:00:51]} h5 {[%emt 0:00:29]} 18. Nf2 {[%emt 0:00:23]} Rg7 {[%emt 0: 00:26]} 19. Kh1 {[%emt 0:00:24]} Rb8 {[%emt 0:01:11]} 20. Rg1 {[%emt 0:02:43]} Nh8 {[%emt 0:00:45]} 21. g3 {[%emt 0:00:18]} Ng6 {[%emt 0:00:57]} 22. gxf4 { [%emt 0:00:54]} Nxf4 {[%emt 0:00:04]} 23. Bxf4 {[%emt 0:00:03]} exf4 {[%emt 0: 00:11]} 24. Rg2 {[%emt 0:00:31]} bxc6 {[%emt 0:00:21]} 25. dxc6 {[%emt 0:00:07] } Qe7 {[%emt 0:00:59]} 26. Qd4 {[%emt 0:00:45]} Qe5 {[%emt 0:00:01]} 27. Qxa7 { [%emt 0:00:43]} Qxc3 {[%emt 0:00:02]} 28. Rag1 {[%emt 0:00:02]} Rxb5 {[%emt 0: 00:03]} 29. Bxb5 {[%emt 0:00:03]} Qxf3 {[%emt 0:00:01]} 30. Qd4 {[%emt 0:00:42] } Rg6 {[%emt 0:02:23]} 31. Qd3 {[%emt 0:00:16]} Qxd3 {[%emt 0:00:43]} 32. Bxd3 {[%emt 0:00:02]} g4 {[%emt 0:00:05]} 33. e5 {[%emt 0:00:04]} f3 {[%emt 0:00:07] } 34. Bxg6 {[%emt 0:00:33]} fxg2+ {[%emt 0:00:01]} 35. Kxg2 {[%emt 0:00:09]} dxe5 {[%emt 0:00:05]} 36. Rb1 {[%emt 0:00:02]} Nd5 {[%emt 0:00:04]} 37. Rb8 { [%emt 0:00:22]} Ba6 {[%emt 0:00:04]} 38. Be4 {[%emt 0:00:12]} Nf4+ {[%emt 0:00: 02]} 39. Kg1 {[%emt 0:00:03]} Kf7 {[%emt 0:00:02]} 40. Ra8 {[%emt 0:00:05]} Bb5 {[%emt 0:00:06]} 41. a6 {[%emt 0:00:10]} Bc5 {[%emt 0:00:04]} 42. a7 {[%emt 0: 00:07]} Nh3+ {[%emt 0:00:12]} 43. Kg2 {[%emt 0:00:01]} Nxf2 {[%emt 0:00:47]} 44. Bd5+ {[%emt 0:00:01]} Ke7 {[%emt 0:00:07]} 45. Re8+ {[%emt 0:00:04]} Kxe8 { [%emt 0:00:01]} 46. a8=Q+ {[%emt 0:00:01]} Ke7 {[%emt 0:00:00]} 47. Qg8 { [%emt 0:00:27]} Kf6 {[%emt 0:00:04]} 48. Qf7+ {[%emt 0:00:06]} Kg5 {[%emt 0:00: 02]} 49. Qg7+ {[%emt 0:00:02]} Kf5 {[%emt 0:00:05]} 50. Qxc7 {[%emt 0:00:05]} Nd3 {[%emt 0:00:05]} 51. Qf7+ {[%emt 0:00:06]} Kg5 {[%emt 0:00:01]} 52. c7 { [%emt 0:00:08]} Ba6 {[%emt 0:00:05]} 53. Qg8+ {[%emt 0:00:04]} Kf4 {[%emt 0:00: 03]} 54. c8=Q {[%emt 0:00:03]} Bxc8 {[%emt 0:00:01]} 55. Qxc8 {[%emt 0:00:01]} e4 {[%emt 0:00:00]} 56. Qe6 {[%emt 0:00:10]} Ne1+ {[%emt 0:00:24]} 57. Kf1 { [%emt 0:00:01]} Nf3 {[%emt 0:00:02]} 58. Qxe4+ {[%emt 0:00:03]} Kg5 {[%emt 0: 00:00]} 59. Kg2 {[%emt 0:00:04]} h4 {[%emt 0:00:09]} 60. h3 {[%emt 0:00:03]} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "17.5"] [White "Mendonca, Leon Luke"] [Black "Salimova, Nurgyul"] [Result "1-0"] [ECO "D24"] [WhiteElo "2549"] [BlackElo "2397"] [Annotator "TA"] [PlyCount "123"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,123,14,58,47,59,50,58,44,44,42,45,40,50,0,4,0,18,7,14,6,11,0,9,0,0,0, 0,-18,-26,-24,17,33,25,48,67,27,69,26,64,51,55,22,115,117,104,117,111,85,591, 69,58,40,29,0,31,38,52,4,8,0,78,0,0,4,4,-67,0,0,66,4,51,58,91,64,114,9,26,0, 126,90,177,181,443,460,416,411,442,450,504,495,645,533,717,662,628,502,485,483, 476,420,720,672,616,588,1264,1221,29996,877,905,757,29976,29978,29978,29976, 29976,29976]} 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 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.} Be7 9. O-O Nc6 10. Be3 {10.Qd2 is more advanced technology.} Bb7 {[#]} 11. b3 $146 ({Predecessor:} 11. Rc1 Nb4 12. Bxc4 Nxc4 13. Rxc4 O-O 14. Qa4 Nd5 15. Rcc1 a5 16. Nc3 Nb6 17. Qc2 {1-0 (31) Sarana,A (2636) -Maghsoodloo,P (2671) chess.com INT 2019}) 11... cxb3 12. axb3 a6 13. Nc3 Nb4 14. Qb1 O-O 15. Rc1 N6d5 16. Ne4 Nxe3 17. fxe3 Nd5 18. Kf2 f6 19. exf6 gxf6 ( 19... Nxf6 {with more complications.} 20. Nxf6+ Bxf6 21. Qc2 e5 22. Qxc7 Qxc7 23. Rxc7 exd4 24. Rd1 Bd5) 20. Nc5 Bxc5 21. dxc5 Qe8 22. Ra4 Rf7 23. Rh4 Rg7 24. g3 Rd8 25. Qb2 Qf7 (25... e5 $1 $11) 26. Rd1 $16 Re8 27. e4 Ne7 {With the idea ...Ng6.} 28. Rd7 Qg6 $2 {[%mdl 8192]} (28... Qf8 $16) 29. Qd4 $2 (29. Nd4 $18 Bc8 (29... f5 30. Bh5) 30. c6 Bxd7 (30... Nxc6 31. Rxg7+ Qxg7 32. Nxc6 $18) 31. cxd7 Rd8 32. Nxe6 Rxd7 33. Bh5 $18) 29... Nc6 $14 30. Rxg7+ Qxg7 31. Qe3 Ne7 32. Nd4 Ng6 33. Rh5 Qe7 34. Bc4 {Strongly threatening c6.} Bc8 (34... Ne5 $11 {keeps the balance.} 35. Rh4 (35. Bxe6+ $2 Qxe6 {[%mdl 64] Remove Defender} 36. Nxe6 Ng4+ {[%mdl 64] Double Attack} 37. Ke2 Nxe3 $19) 35... Nxc4 36. bxc4 Qxc5) 35. Qh6 (35. Nf5 $16 Qf8 36. Nh6+ Kh8 37. Ng4) 35... Qg7 36. Qxg7+ (36. Qc1 {is more complex.} Ne5 37. Be2 Rd8 38. Nf3 Nxf3 39. Kxf3 e5 40. Bc4+) 36... Kxg7 37. Nf3 (37. Ke3 $11) 37... Rd8 ({Better is} 37... e5 $1 $15 38. h3 Rd8) 38. e5 $1 $11 {[%CAl Re5f6] exf6+ is the strong threat.} fxe5 (38... f5 $11) 39. Nxe5 (39. Ke2 $14) 39... Rd2+ 40. Ke3 Rd1 41. Nf3 Bb7 42. Be2 (42. Bxe6 $16 Bxf3 43. Kxf3) 42... Rb1 43. Bc4 Ne7 (43... Rd1 $1 $11) 44. Nd4 {White stays focused until the end.} Nd5+ (44... Bd5 $16) 45. Kd2 $18 Nb4 $2 (45... Bc8 46. Bd3 (46. Bxd5 exd5 47. Rxd5 Kf6 $16) 46... Rb2+ 47. Kc1 Nf6) 46. Nxe6+ Kf6 47. Nxc7 a5 48. Rxh7 Rb2+ 49. Ke3 Bg2 50. Nb5 Nc2+ 51. Kf4 Nb4 52. Nd6 {Black must now prevent Ne8+.} Rf2+ 53. Kg4 {Threatens to win with Rf7+.} Bf3+ {[#]} 54. Kh3 $1 Kg6 (54... Ke5 $142 55. g4 Bc6) 55. Rf7 Bg2+ 56. Kh4 Bf3 {[%CAl Rf2h2]} 57. h3 Nc6 58. Bd5 Ne5 {[#]} 59. Rf4 $1 Kh6 (59... Bxd5 60. Rxf2) 60. Nf7+ { White mates.} Nxf7 61. Rxf7 Bxd5 62. Rxf2 {Weighted Error Value: White=0.41/ Black=0.45} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "17.6"] [White "Abdumalik, Zhansaya"] [Black "Praggnanandhaa R"] [Result "0-1"] [ECO "B63"] [WhiteElo "2472"] [BlackElo "2608"] [Annotator "TA"] [PlyCount "98"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 25,98,0,0,-65,-64,-58,-55,-78,-38,-53,-43,-70,-47,-47,-33,-62,-38,-103, -81,-71,-48,-56,-51,-37,-41,-86,-32,-26,-11,-46,-47,-52,-55,-58,-56,-110,-102, -133,-127,-130,-100,-115,-114,-93,-100,-80,-51,-301,-290,-236,-238,-229,-220, -218,-70,-277,-277,-329,-310,-297,-312,-437,-431,-415,-375,-717,-709,-693,-687, -1509,-1834,-29976,-29977,-29983,-29984]} 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 a6 8. O-O-O Be7 9. f3 Nxd4 10. Qxd4 O-O 11. Kb1 b5 12. h4 Bb7 13. g4 Rc8 14. h5 {[#] B63: Sicilian: Richter-Rauzer: 7... Be7 and unusual Black 7th moves.} (14. Bd3 $11) 14... Nxe4 $1 $15 15. Nxe4 { h6 is the strong threat.} Bxg5 16. Qxd6 {[#] Black is slightly better.} Bf4 $146 ({Predecessor:} 16... Be7 17. Qxd8 Rfxd8 18. Be2 f5 19. gxf5 exf5 20. Ng3 g6 21. hxg6 hxg6 22. Rdg1 Rc5 {0-1 (42) Sarwat,W (2325)-Sameeh,H (2289) Tanta 2003}) 17. Qxd8 Rfxd8 18. Rxd8+ Rxd8 {[%CAl Rd8d1]} 19. Bd3 Rc8 20. Rf1 g6 21. a3 ({Better is} 21. hxg6 $15 hxg6 22. Nf6+ Kg7 23. Be4) 21... Kg7 22. b4 Rc7 23. Nc5 Bc8 24. hxg6 hxg6 25. Kb2 Bd6 (25... Be3 $17 26. Nb3 Kf6) 26. Ne4 Be5+ 27. c3 f5 28. Nc5 Bd6 29. Nb3 Kf6 30. Rh1 (30. Rd1 $15) 30... Bb7 $17 31. Rh3 Bd5 32. Nd4 {intending gxf5.} Be5 33. Ne2 fxg4 34. fxg4 {[#]} Kg5 $1 35. Re3 Bf4 36. Rh3 ({White has to play} 36. Nxf4 $15 Kxf4 37. Re1) 36... e5 $19 (36... Kxg4 37. Nxf4 Kxf4 38. Bxg6 $17) 37. Rh8 e4 (37... Kxg4 38. Bxg6 Kf3 39. Bh5+ Ke3 40. Re8 $17) 38. Rd8 Bb7 (38... exd3 39. Rxd5+ Kxg4 40. Rxd3 $17) 39. Bc2 Be5 ({Don't take} 39... Kxg4 40. Re8 $17) (39... Re7 $19 40. a4 bxa4 41. Bxa4 Kxg4) 40. Rg8 $2 (40. Re8 $15 Kf6 41. Bb3) 40... Re7 ({Don't play} 40... Kxg4 41. Rxg6+ Kf3 42. Nd4+ Ke3 43. a4 $17) 41. a4 Bd5 (41... Kxg4 42. axb5 axb5 43. Rxg6+ Kf3 44. Ng1+ Kf2 45. Nh3+ Ke2 46. Rg2+ Kf3 47. Rg6 $17) 42. Rd8 Bc4 43. Nc1 (43. Bd1 {was worth a try.}) 43... Bf4 44. axb5 axb5 45. Nb3 $2 (45. Rd4 e3 46. Bd3 Bxd3 47. Nxd3) 45... e3 46. Nd4 e2 47. Rf8 Bd5 48. Nxe2 Rxe2 49. Rd8 Be4 {Weighted Error Value: White=0.70/Black=0.10} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "17.7"] [White "Khademalsharieh, Sarasadat"] [Black "Yip, Carissa"] [Result "1/2-1/2"] [ECO "D77"] [WhiteElo "2494"] [BlackElo "2430"] [Annotator "Shahid"] [PlyCount "92"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] [TimeControl "600+5"] {[%evp 0,92,20,23,66,37,47,47,47,34,27,-1,22,6,6,4,13,12,23,26,44,24,65,-12,-5, -7,-7,-5,33,17,21,-33,10,0,17,-58,63,67,68,57,69,71,41,-35,-35,-15,11,0,19,-12, 3,0,-33,-19,-11,-11,-18,-45,-50,-110,-127,-154,-60,-114,-93,-104,-89,-102,-83, -53,-74,-73,-69,-52,0,-158,-124,-105,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 {[%emt 0:00:00]} g6 {[%emt 0:00:00]} 2. c4 {[%emt 0:00:00]} Bg7 {[%emt 0:00:01] } 3. Nf3 {[%emt 0:00:03]} Nf6 {[%emt 0:00:09]} 4. g3 {[%emt 0:00:02]} d5 { [%emt 0:00:04]} 5. Bg2 {[%emt 0:00:08]} O-O {[%emt 0:00:03]} 6. O-O {[%emt 0: 00:02]} dxc4 {[%emt 0:00:02]} 7. Na3 {[%emt 0:00:01]} Nc6 {[%emt 0:00:01]} 8. Nxc4 {[%emt 0:00:06]} Be6 {[%emt 0:00:01]} 9. b3 {[%emt 0:01:01]} Bd5 {[%emt 0: 00:03]} 10. Bb2 {[%emt 0:00:12]} a5 {[%emt 0:00:02]} 11. a4 {[%emt 0:00:50]} Qc8 {[%emt 0:00:10]} 12. Rc1 {[%emt 0:00:11]} Rd8 {[%emt 0:00:41]} 13. e3 { [%emt 0:00:32]} Ne4 {[%emt 0:00:48]} 14. Qe2 {[%emt 0:00:14]} Qe6 {[%emt 0:00: 30]} 15. Ne1 {[%emt 0:01:36]} Ng5 {[%emt 0:02:12]} 16. h4 {[%emt 0:01:51]} Bxg2 {[%emt 0:00:40]} 17. Nxg2 {[%emt 0:00:22]} Ne4 {[%emt 0:00:15]} 18. Nf4 { [%emt 0:00:32]} Qf5 {[%emt 0:00:02]} 19. Kg2 {[%emt 0:00:37]} e5 {[%emt 0:00: 50]} 20. g4 {[%emt 0:01:17]} Qf6 {[%emt 0:00:03]} 21. g5 {[%emt 0:00:46]} (21. Nxe5 Nxe5 22. dxe5 Qxh4 23. e6 Bxb2 (23... Rd2 24. exf7+ Kh8 25. Nxg6+ hxg6 26. Rh1 $18) 24. exf7+ Kf8 (24... Kh8 25. Qxb2+) 25. Ne6+) 21... Qf5 {[%emt 0:00: 17]} 22. dxe5 {[%emt 0:00:01]} Nxe5 {[%emt 0:00:03]} 23. Bxe5 {[%emt 0:00:10]} Bxe5 {[%emt 0:00:04]} 24. Nxe5 {[%emt 0:00:01]} Qxe5 {[%emt 0:00:01]} 25. Rc2 { [%emt 0:00:04]} c6 {[%emt 0:01:13]} 26. Rd1 {[%emt 0:00:31]} Nc3 {[%emt 0:00: 11]} 27. Rxd8+ {[%emt 0:00:02]} Rxd8 {[%emt 0:00:00]} 28. Qf3 {[%emt 0:00:04]} Ne4 {[%emt 0:00:03]} 29. Rc4 {[%emt 0:00:13]} Nd2 {[%emt 0:00:05]} 30. Qd1 { [%emt 0:00:02]} Rd6 {[%emt 0:00:19]} 31. Rc1 {[%emt 0:00:26]} Qe4+ {[%emt 0:00: 24]} 32. Kg3 {[%emt 0:00:02]} Qf5 {[%emt 0:00:26]} 33. Kg2 {[%emt 0:00:11]} f6 {[%emt 0:00:29]} 34. gxf6 {[%emt 0:00:07]} Qxf6 {[%emt 0:00:07]} 35. Qg4 { [%emt 0:00:01]} Nxb3 {[%emt 0:00:17]} 36. Rc2 {[%emt 0:00:14]} Qf5 {[%emt 0:00: 13]} 37. Qe2 {[%emt 0:00:01]} Qe4+ {[%emt 0:00:19]} 38. Kg3 {[%emt 0:00:04]} Qxa4 {[%emt 0:00:21]} 39. Qg4 {[%emt 0:00:05]} Rf6 {[%emt 0:00:26]} 40. Qc8+ { [%emt 0:00:07]} Rf8 {[%emt 0:00:01]} 41. Qe6+ {[%emt 0:00:10]} Rf7 {[%emt 0:00: 23]} 42. Rc3 {[%emt 0:00:04]} Nd2 {[%emt 0:00:08]} 43. Qe8+ {[%emt 0:00:12]} Rf8 {[%emt 0:00:09]} 44. Qe6+ {[%emt 0:00:02]} Rf7 {[%emt 0:00:12]} 45. Qe8+ { [%emt 0:00:06]} Rf8 {[%emt 0:00:02]} 46. Qe6+ {[%emt 0:00:02]} Rf7 {[%emt 0:00: 03]} 1/2-1/2 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "17.8"] [White "Abdusattorov, Nodirbek"] [Black "Lei, Tingjie"] [Result "0-1"] [ECO "C54"] [WhiteElo "2627"] [BlackElo "2505"] [Annotator "TA"] [PlyCount "96"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 11,96,8,8,0,0,0,0,0,7,13,20,12,6,7,8,13,24,20,24,15,16,12,16,14,13,0,2, 0,50,28,19,16,11,21,16,12,12,8,5,21,16,16,19,0,0,0,57,-26,-38,-65,124,137,137, 78,88,42,47,55,43,55,116,108,107,0,0,0,0,-518,-450,-450,-450,-558,-552,-549, -542,-1020,-1017,-1014,-1014,-1010,-997,-1008,-986,-985,-935,-813,-768]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 6. Bb3 h6 7. Nbd2 {[%CAl Bb1d2, Bd2f1,Bf1g3][%mdl 32] C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3.} a5 8. h3 Bd7 9. Nf1 {[#] The position is equal.} Ne7 $146 ({Predecessor:} 9... O-O 10. Ng3 Ne7 11. O-O Ng6 12. d4 Ba7 13. Be3 Re8 14. Re1 Bc6 15. Bc2 exd4 16. Bxd4 {1-0 (35) Perez Gormaz,M (2413)-Cervantes Landeiro,T (2311) chess.com INT 2020}) 10. Ng3 Ng6 11. O-O a4 12. Bc2 O-O 13. d4 Ba7 14. Be3 b5 15. Qd2 Re8 16. Rad1 Qe7 17. Rfe1 Be6 18. b3 axb3 19. axb3 Rad8 20. Ra1 Bb6 21. d5 Bxe3 22. Qxe3 Bd7 23. Ra7 Rc8 24. Bd3 Nf4 25. Bf1 Qf8 26. Rea1 c6 27. Rxd7 { [%mdl 64] Remove Defender} Nxd7 28. dxc6 Rxc6 (28... Nb8 $1 $11) 29. Bxb5 (29. Ra7 $1 $14) 29... Rc7 $11 30. Ra7 {[#]} Rec8 31. Bxd7 $16 Rxc3 32. Qb6 (32. Qd2 $142 Rc2 33. Qa5) 32... Rb8 33. Rb7 Rxb7 34. Qxb7 Qd8 {White must now prevent . ..Rc7.} 35. Bc6 Nxh3+ 36. gxh3 Rxf3 37. Kg2 (37. Bd5 $16 Qf6 38. Nf5) 37... Qf6 $11 38. Nf5 Rc3 39. Qe7 $4 {[%mdl 8192]} Qxe7 $19 {Black is clearly winning.} ( {Weaker is} 39... Qg6+ 40. Ng3 $14) 40. Nxe7+ Kf8 41. Nd5 Rxc6 {[%mdl 4096] Endgame KR-KN} 42. b4 Rc4 43. Kf3 f5 44. exf5 Rd4 45. Nc7 Rxb4 46. Kg3 Kf7 47. f3 Rf4 48. Nb5 Ke7 {Weighted Error Value: White=0.44/Black=0.13} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "17.9"] [White "Murzin, Volodar"] [Black "Badelka, Olga"] [Result "1-0"] [ECO "C11"] [WhiteElo "2478"] [BlackElo "2433"] [Annotator "Shahid"] [PlyCount "79"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] [TimeControl "600+5"] {[%evp 0,79,23,25,47,36,18,38,56,51,43,3,-1,-23,-14,-21,-24,-10,-3,-4,-5,0,7, -27,-9,-16,-26,-10,-15,-44,-21,-79,-50,-72,-12,-37,-46,-50,-39,-39,-22,-5,12, -17,14,-24,-2,33,27,-14,-5,-20,76,-75,-100,-97,-85,-169,-149,-170,-111,-169, -107,-199,-181,-260,-287,-275,-340,-560,0,267,364,371,356,356,354,354,579,886, 29999,-30000]} 1. e4 {[%emt 0:00:00]} e6 {[%emt 0:00:00]} 2. d4 {[%emt 0:00:00] } d5 {[%emt 0:00:00]} 3. Nc3 {[%emt 0:00:02]} Nf6 {[%emt 0:00:00]} 4. e5 { [%emt 0:00:01]} Nfd7 {[%emt 0:00:00]} 5. Nce2 {[%emt 0:00:01]} c5 {[%emt 0:00: 03]} 6. c3 {[%emt 0:00:00]} Nc6 {[%emt 0:00:04]} 7. f4 {[%emt 0:00:04]} Be7 { [%emt 0:00:03]} 8. Nf3 {[%emt 0:00:01]} O-O {[%emt 0:00:03]} 9. g3 {[%emt 0:00: 04]} b5 {[%emt 0:00:04]} 10. a3 {[%emt 0:00:03]} a5 {[%emt 0:00:02]} 11. Bg2 { [%emt 0:01:13]} b4 {[%emt 0:00:11]} 12. axb4 {[%emt 0:00:08]} cxb4 {[%emt 0:00: 02]} 13. O-O {[%emt 0:00:06]} Nb6 {[%emt 0:01:01]} 14. g4 {[%emt 0:00:39]} bxc3 {[%emt 0:00:20]} 15. bxc3 {[%emt 0:00:03]} Nc4 {[%emt 0:00:25]} 16. Ng3 { [%emt 0:00:43]} f6 {[%emt 0:00:59]} 17. Kh1 {[%emt 0:00:08]} fxe5 {[%emt 0:00: 41]} 18. dxe5 {[%emt 0:00:15]} Kh8 {[%emt 0:01:25]} 19. Nd4 {[%emt 0:00:15]} Nxd4 {[%emt 0:01:02]} 20. cxd4 {[%emt 0:00:03]} Bh4 {[%emt 0:00:21]} 21. Ne2 { [%emt 0:00:29]} Be7 {[%emt 0:00:15]} 22. Bh3 {[%emt 0:03:01]} Bd7 {[%emt 0:01: 36]} 23. f5 {[%emt 0:00:18]} Bg5 {[%emt 0:00:18]} 24. Qd3 {[%emt 0:00:37]} Bxc1 {[%emt 0:00:41]} 25. Raxc1 {[%emt 0:00:03]} Qg5 {[%emt 0:00:15]} 26. Ng3 { [%emt 0:01:10]} a4 {[%emt 0:00:19]} 27. Ra1 {[%emt 0:01:55]} a3 {[%emt 0:00:02] } 28. Rfe1 {[%emt 0:00:37]} Qh4 {[%emt 0:01:11]} 29. Kg2 {[%emt 0:00:09]} Rab8 {[%emt 0:00:03]} 30. Re2 {[%emt 0:00:04]} Rb2 {[%emt 0:00:22]} 31. Ra2 { [%emt 0:00:12]} Qg5 {[%emt 0:00:08]} 32. Kh1 {[%emt 0:00:07]} Qc1+ {[%emt 0:00: 03]} 33. Kg2 {[%emt 0:00:00]} Ne3+ {[%emt 0:00:22]} 34. Kf3 {[%emt 0:00:04]} Nd1 $2 {[%emt 0:00:10]} (34... exf5) (34... Bb5) 35. Qxa3 {[%emt 0:00:05]} Rfb8 {[%emt 0:00:16]} 36. Raxb2 {[%emt 0:00:04]} Nxb2 {[%emt 0:00:01]} 37. f6 { [%emt 0:00:05]} gxf6 {[%emt 0:00:03]} 38. exf6 {[%emt 0:00:01]} Qb1 {[%emt 0: 00:12]} 39. Qe7 {[%emt 0:00:10]} Nc4 {[%emt 0:00:04]} 40. Qg7# {[%emt 0:00:02]} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "17.10"] [White "Mammadzada, Gunay"] [Black "Nihal Sarin"] [Result "0-1"] [ECO "C70"] [WhiteElo "2443"] [BlackElo "2620"] [Annotator "TA"] [PlyCount "116"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 10,116,41,3,0,0,0,0,0,-14,0,-36,18,25,34,30,35,0,27,17,26,0,3,0,0,0,0,0, 12,-10,0,-18,-14,-18,-21,-24,-25,-21,-21,-36,-26,-31,-29,-25,-17,-18,-20,-15, -18,-33,-28,-37,-37,-32,-23,-88,-94,-85,-80,-91,-79,-349,-347,-327,-318,-485, -492,-492,-477,-460,-414,-563,-555,-377,-312,-181,-35,-403,-404,-399,-388,-350, -324,-406,-393,-5364,-5269,-5089,-4718,-1780,-408,-403,-393,-378,0,0,0,0,0,0,0, -5076,-5052,-4133,-4133,-29984,-29985,-29988,-29989]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Bc5 5. O-O d6 6. h3 Nge7 {C70: Ruy Lopez: 3...a6 4 Ba4, Norwegian and Delayed Schliemann.} 7. c3 O-O 8. d4 Ba7 {[#] The position is equal.} 9. Bg5 $146 ({Predecessor:} 9. Re1 b5 10. Bb3 Ng6 11. a4 bxa4 12. Rxa4 Rb8 13. Bc4 Nh4 14. d5 Nxf3+ 15. Qxf3 {1-0 (56) Pineiro,D (2198)-Lallana Yanez, D (2003) Montevideo 2011}) 9... f6 10. Be3 Kh8 ({Black should play} 10... f5 $1 $15) 11. Nbd2 $11 Bd7 12. Re1 Be8 13. d5 Nb8 14. Bxe8 {Threatens to win with Bxa7.} Qxe8 15. Qb3 Bxe3 16. Rxe3 Ra7 17. c4 Nd7 18. Qc3 h6 19. Re2 Ra8 20. Rc1 a5 21. b3 f5 22. exf5 Nxf5 23. Ne4 b6 24. a3 Qg6 25. Kh2 Nf6 26. Ng3 Nxg3 27. fxg3 Kg8 28. Qe3 Rf7 29. g4 Raf8 30. b4 axb4 31. axb4 b5 32. Nh4 (32. cxb5 $11 {keeps the balance.} Nxd5 33. Qb3) 32... Nxg4+ $17 33. hxg4 Qxg4 {[%mdl 64] Double Attack} 34. g3 g5 $36 {[%mdl 2048] Black has strong initiative.} ({ Reject} 34... bxc4 $6 35. Rec2 $11) 35. Ng2 {[%mdl 8192] [#]} (35. Qe4 $17 { was forced.} Qxe4 36. Rxe4 gxh4 37. Rxh4) 35... Rf1 $1 $19 (35... bxc4 36. Qe4 $16) 36. Rxf1 Rxf1 37. Rf2 (37. Re1 {keeps fighting.} Qh5+ 38. Nh4 Rxe1 39. Qxe1) 37... Qh5+ 38. Nh4 Rxf2+ 39. Qxf2 gxh4 40. cxb5 hxg3+ 41. Kxg3 {[%mdl 4096] Endgame KQ-KQ} Qg5+ 42. Kh3 Kg7 ({Black should try} 42... e4 $19 43. Qc2 Qh5+ 44. Kg3 Qg5+ 45. Kh3 Qf5+ 46. Kh2 Qh5+ 47. Kg3 Qe5+ 48. Kg2 Qe7) 43. Qa7 $2 {[%mdl 8192]} (43. b6 $1 $15 cxb6 44. Qxb6) 43... Qf5+ 44. Kh2 Qf4+ 45. Kh3 Qf7 ({Worse is} 45... Qxb4 46. Qxc7+ Kg6 47. b6 $11) 46. Qb7 e4 47. Qc6 $2 (47. Qa7) 47... Kg6 48. b6 Qf3+ 49. Kh2 Qf2+ (49... Qf4+ $142 50. Kg2 cxb6 51. Qxb6 e3) 50. Kh3 {Threatening Qe8+.} Qe3+ 51. Kg2 {[#]} Qxb6 $2 (51... Qg5+ $1 $19 52. Kh1 Qh5+ 53. Kg1 Qg4+ 54. Kh1 Qf3+ 55. Kg1 Qg3+ 56. Kf1 Qf4+ 57. Ke2 cxb6 58. Qxb6 Kf5) 52. Qe8+ $11 Kf5 53. Qe6+ $1 Kf4 54. Qf6+ $1 Ke3 55. Qxh6+ $2 { [%mdl 8192]} (55. Qc3+ $11 Kf4 56. Qf6+ Kg4 57. Qg6+ Kf4 58. Qf6+) 55... Kd3 56. Qh7 Qxb4 57. Qxc7 e3 58. Qh7+ Qe4+ {Weighted Error Value: White=0.79/ Black=0.39} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "18.1"] [White "Zhu, Jiner"] [Black "Nihal Sarin"] [Result "0-1"] [ECO "C70"] [WhiteElo "2459"] [BlackElo "2620"] [Annotator "TA"] [PlyCount "66"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 10,66,42,42,38,11,18,0,0,-8,0,-23,14,-43,9,-26,18,9,10,5,7,-17,0,-56,0, 0,34,-38,-12,-13,-27,-41,-50,-47,-35,-32,-39,-59,-56,-53,-24,-83,-102,-149, -139,-175,-171,-165,-171,-217,-218,-324,-148,-124,-153,-181,-163,-623,-615]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Bc5 5. O-O d6 6. c3 Ba7 {C70: Ruy Lopez: 3... a6 4 Ba4, Norwegian and Delayed Schliemann.} 7. h3 Nge7 8. d4 O-O {[#] The position is equal.} 9. Bg5 $146 ({Predecessor:} 9. Re1 b5 10. Bb3 Ng6 11. a4 bxa4 12. Rxa4 Rb8 13. Bc4 Nh4 14. d5 Nxf3+ 15. Qxf3 {1-0 (56) Pineiro,D (2198) -Lallana Yanez,D (2003) Montevideo 2011}) 9... f6 10. Be3 Kh8 11. Bb3 (11. Re1 $11) 11... Bd7 (11... f5 $1 $15) 12. Re1 Be8 13. Nbd2 Bh5 14. g4 Bg6 15. Be6 d5 16. exd5 ({White should try} 16. dxe5 $1 $11 dxe4 17. Nh4) 16... Nxd5 (16... exd4 $1 $15 17. Bxd4 Nxd4 18. cxd4 Nxd5 19. Bxd5 Qxd5) 17. Bxd5 $14 Qxd5 18. c4 (18. dxe5 $14 Bxe3 19. Rxe3) 18... Qd7 {[%CAl Re5d4]} 19. d5 Ne7 20. Bxa7 Rxa7 21. Nh4 Raa8 22. Qe2 c6 23. dxc6 Qxc6 24. Rad1 Rad8 {White must now prevent ... Bd3.} 25. Nxg6+ (25. Nf1 $11 {remains equal.}) 25... Nxg6 $17 26. Qe4 Qb6 27. Nb3 Nf4 28. c5 Qb5 ({Worse is} 28... Nxh3+ 29. Kh2 $18 (29. Kg2 Qc6 $11)) 29. Kh2 a5 30. Rd6 (30. Qe3 {was worth a try.}) 30... Rxd6 (30... a4 $19 31. Rb6 Qd3 32. Qxd3 Nxd3) 31. cxd6 Qb6 32. Qe3 Qxd6 33. Nxa5 $2 {[#]} (33. Qc5 Qxc5 34. Nxc5) 33... Qd5 $1 {[%csl Gf4,Ba2,Ba5][%CAl Rd5g2][%mdl 64] Double Attack. Weighted Error Value: White=0.47/Black=0.21} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "18.2"] [White "Badelka, Olga"] [Black "Mammadzada, Gunay"] [Result "0-1"] [ECO "A07"] [WhiteElo "2433"] [BlackElo "2443"] [Annotator "NA"] [PlyCount "156"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] [TimeControl "600+5"] {[%evp 0,102,25,18,14,-7,10,20,1,11,21,7,27,25,21,21,25,14,14,12,32,21,29,35, 35,23,25,5,17,10,14,-3,19,6,8,-15,-17,-17,32,30,66,49,59,36,47,38,43,33,38,33, 25,11,11,-6,1,0,31,32,118,33,31,17,39,31,41,45,21,25,15,15,85,66,65,65,59,55, 46,47,80,43,43,30,46,45,18,19,13,26,19,19,7,-18,-45,-55,-47,-47,-41,-58,-54, -63,-71,-92,0,-31,-80]} 1. Nf3 {[%emt 0:00:00]} d5 {[%emt 0:00:00]} 2. g3 { [%emt 0:00:00]} c6 {[%emt 0:00:00]} 3. Bg2 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00] } 4. O-O {[%emt 0:00:00]} Bg4 {[%emt 0:00:00]} 5. h3 {[%emt 0:00:02]} Bh5 { [%emt 0:00:02]} 6. d4 {[%emt 0:00:01]} e6 {[%emt 0:00:31]} 7. c4 {[%emt 0:00: 02]} Nbd7 {[%emt 0:00:19]} 8. cxd5 {[%emt 0:00:05]} exd5 {[%emt 0:00:04]} 9. Nh4 {[%emt 0:00:01]} Bg6 {[%emt 0:00:03]} 10. Nc3 {[%emt 0:00:01]} Bd6 { [%emt 0:00:19]} 11. Nxg6 {[%emt 0:00:14]} hxg6 {[%emt 0:00:02]} 12. Qd3 { [%emt 0:00:02]} O-O {[%emt 0:00:32]} 13. h4 {[%emt 0:00:21]} Re8 {[%emt 0:00: 21]} 14. Bg5 {[%emt 0:00:17]} Qb6 {[%emt 0:00:12]} 15. Bf3 {[%emt 0:01:12]} Be7 {[%emt 0:00:46]} 16. Kg2 {[%emt 0:00:38]} Nf8 {[%emt 0:00:44]} 17. b3 {[%emt 0: 00:56]} Ne6 {[%emt 0:00:09]} 18. Bxf6 {[%emt 0:00:20]} Bxf6 {[%emt 0:00:02]} 19. e3 {[%emt 0:00:01]} Rad8 {[%emt 0:01:46]} 20. Rh1 {[%emt 0:00:49]} Nf8 { [%emt 0:00:16]} 21. Rac1 {[%emt 0:00:59]} Qb4 {[%emt 0:00:21]} 22. Ne2 { [%emt 0:00:39]} Qd6 {[%emt 0:00:28]} 23. Rh3 {[%emt 0:00:28]} Ne6 {[%emt 0:00: 18]} 24. Rch1 {[%emt 0:00:58]} c5 {[%emt 0:01:00]} 25. h5 {[%emt 0:00:05]} g5 { [%emt 0:00:27]} 26. dxc5 {[%emt 0:02:13]} Nxc5 {[%emt 0:00:05]} 27. Qf5 { [%emt 0:00:03]} Qe6 {[%emt 0:01:45]} 28. Qxe6 {[%emt 0:00:01]} fxe6 {[%emt 0: 00:05]} 29. Rd1 {[%emt 0:00:44]} Nd7 {[%emt 0:00:16]} 30. Nd4 {[%emt 0:00:28]} Bxd4 {[%emt 0:00:57]} 31. exd4 {[%emt 0:00:02]} Nf6 {[%emt 0:00:00]} 32. Rhh1 { [%emt 0:00:11]} Rc8 {[%emt 0:00:01]} 33. Rc1 {[%emt 0:00:12]} g4 {[%emt 0:00: 02]} 34. Be2 {[%emt 0:00:02]} Kh7 {[%emt 0:00:01]} 35. Bd3+ {[%emt 0:00:10]} Kh6 {[%emt 0:00:04]} 36. Bg6 {[%emt 0:00:04]} Rf8 {[%emt 0:00:21]} 37. Rce1 { [%emt 0:00:07]} Rc6 {[%emt 0:00:14]} 38. Re2 {[%emt 0:00:03]} Ng8 {[%emt 0:00: 10]} 39. Rhe1 {[%emt 0:00:04]} Rf6 {[%emt 0:00:02]} 40. Be8 {[%emt 0:00:20]} Rd6 {[%emt 0:00:01]} 41. Rc1 {[%emt 0:00:04]} Rf8 {[%emt 0:00:08]} 42. Bg6 { [%emt 0:00:02]} Ne7 {[%emt 0:00:10]} 43. Rc7 {[%emt 0:00:10]} Nxg6 {[%emt 0:00: 16]} 44. hxg6 {[%emt 0:00:00]} Rb6 {[%emt 0:00:01]} 45. Re1 {[%emt 0:00:13]} Kxg6 {[%emt 0:00:07]} 46. Rh1 {[%emt 0:00:02]} Rf7 {[%emt 0:00:10]} 47. Rc8 { [%emt 0:00:09]} Rc6 {[%emt 0:00:02]} 48. Rxc6 {[%emt 0:00:02]} bxc6 {[%emt 0: 00:02]} 49. Rc1 {[%emt 0:00:01]} Rc7 {[%emt 0:00:01]} 50. b4 {[%emt 0:00:19]} Rb7 {[%emt 0:00:20]} 51. a3 {[%emt 0:00:02]} Rb6 {[%emt 0:00:02]} 52. Rc5 { [%emt 0:00:04]} Ra6 {[%emt 0:00:04]} 53. Rc3 {[%emt 0:00:06]} Kf5 {[%emt 0:00: 09]} 54. Re3 {[%emt 0:00:01]} Ra4 {[%emt 0:00:03]} 55. Rc3 {[%emt 0:00:13]} a5 {[%emt 0:00:02]} 56. bxa5 {[%emt 0:00:02]} Rxd4 {[%emt 0:00:06]} 57. Rxc6 { [%emt 0:00:02]} Ra4 {[%emt 0:00:01]} 58. a6 {[%emt 0:00:02]} Rxa3 {[%emt 0:00: 01]} 59. Kf1 {[%emt 0:00:15]} e5 {[%emt 0:00:03]} 60. Ke2 {[%emt 0:00:04]} Ke4 {[%emt 0:00:01]} 61. Rb6 {[%emt 0:00:05]} Ra2+ {[%emt 0:00:02]} 62. Ke1 { [%emt 0:00:03]} d4 {[%emt 0:00:02]} 63. Kf1 {[%emt 0:00:07]} d3 {[%emt 0:00:06] } 64. Ke1 {[%emt 0:00:01]} Kd4 {[%emt 0:00:15]} 65. Rc6 {[%emt 0:00:08]} Re2+ { [%emt 0:00:12]} 66. Kf1 {[%emt 0:00:03]} Rc2 {[%emt 0:00:10]} 67. a7 {[%emt 0: 00:08]} Ra2 {[%emt 0:00:05]} 68. Rc7 {[%emt 0:00:02]} g5 {[%emt 0:00:03]} 69. Ke1 {[%emt 0:00:02]} Ke4 {[%emt 0:00:01]} 70. Kd1 {[%emt 0:00:13]} Kf3 { [%emt 0:00:10]} 71. Rf7+ {[%emt 0:00:02]} Kg2 {[%emt 0:00:03]} 72. Ke1 { [%emt 0:00:01]} e4 {[%emt 0:00:03]} 73. Kd1 {[%emt 0:00:02]} Kf1 {[%emt 0:00: 05]} 74. Kc1 {[%emt 0:00:13]} Ke1 {[%emt 0:00:02]} 75. Kb1 {[%emt 0:00:01]} Ra4 {[%emt 0:00:14]} 76. Rd7 {[%emt 0:00:09]} d2 {[%emt 0:00:03]} 77. Kc2 {[%emt 0: 00:01]} Ra2+ {[%emt 0:00:02]} 78. Kb3 {[%emt 0:00:06]} Rxa7 {[%emt 0:00:02]} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "18.3"] [White "Lei, Tingjie"] [Black "Murzin, Volodar"] [Result "0-1"] [ECO "D10"] [WhiteElo "2505"] [BlackElo "2478"] [Annotator "ChessBase"] [PlyCount "88"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] [TimeControl "600+5"] {[%evp 0,88,18,18,18,-5,32,30,29,25,26,32,27,26,23,24,17,29,16,41,38,25,19,14, 14,22,26,22,21,4,8,-1,-23,0,-19,-36,-2,0,-10,-42,-21,-18,-4,-19,-2,-28,-10,0, -15,-16,0,-16,-18,-25,-22,-22,-22,-31,0,0,0,-85,-88,-106,-109,-88,-86,-104,-93, -93,-98,-97,-102,-109,270,349,361,-179,-170,-179,-147,-219,-227,-265,-307, -1012,-1013,-1012,-1013,-1013,-1013]} 1. d4 {[%emt 0:00:00]} d5 {[%emt 0:00:00] } 2. c4 {[%emt 0:00:00]} c6 {[%emt 0:00:00]} 3. cxd5 {[%emt 0:00:00]} cxd5 { [%emt 0:00:00]} 4. Bf4 {[%emt 0:00:00]} Nc6 {[%emt 0:00:07]} 5. Nc3 {[%emt 0: 00:02]} e6 {[%emt 0:00:00]} 6. e3 {[%emt 0:00:02]} Bd6 {[%emt 0:00:02]} 7. Bxd6 {[%emt 0:00:01]} Qxd6 {[%emt 0:00:00]} 8. Qg4 {[%emt 0:00:01]} Kf8 {[%emt 0:00: 32]} 9. Nf3 {[%emt 0:00:11]} Nge7 {[%emt 0:00:03]} 10. Qg3 {[%emt 0:00:32]} Nf5 {[%emt 0:00:45]} 11. Qxd6+ {[%emt 0:00:04]} Nxd6 {[%emt 0:00:00]} 12. Rc1 { [%emt 0:00:03]} Bd7 {[%emt 0:00:04]} 13. Nb5 {[%emt 0:00:47]} Ke7 {[%emt 0:00: 06]} 14. Nxd6 {[%emt 0:00:07]} Kxd6 {[%emt 0:00:01]} 15. Kd2 {[%emt 0:00:28]} f6 {[%emt 0:00:13]} 16. Bb5 {[%emt 0:00:35]} Rhc8 {[%emt 0:00:07]} 17. h4 { [%emt 0:00:58]} Be8 {[%emt 0:00:57]} 18. Bd3 {[%emt 0:00:18]} h6 {[%emt 0:00: 52]} 19. g4 {[%emt 0:00:28]} Nb4 {[%emt 0:00:21]} 20. Bb1 {[%emt 0:00:05]} Rxc1 {[%emt 0:00:04]} 21. Rxc1 {[%emt 0:00:03]} Nc6 {[%emt 0:00:05]} 22. Rg1 { [%emt 0:00:45]} Ne7 {[%emt 0:00:11]} 23. g5 {[%emt 0:00:43]} Bh5 {[%emt 0:00: 42]} 24. Ne1 {[%emt 0:00:23]} Rg8 {[%emt 0:01:26]} 25. Bh7 {[%emt 0:00:38]} Rf8 {[%emt 0:00:12]} 26. Nd3 {[%emt 0:02:15]} fxg5 {[%emt 0:02:10]} 27. hxg5 { [%emt 0:00:04]} g6 {[%emt 0:01:44]} 28. Nf4 {[%emt 0:00:03]} hxg5 {[%emt 0:00: 40]} 29. Rxg5 {[%emt 0:00:12]} Rf7 {[%emt 0:00:02]} 30. Bxg6 {[%emt 0:00:21]} Bxg6 {[%emt 0:00:04]} 31. Nxg6 {[%emt 0:00:02]} Rxf2+ {[%emt 0:00:05]} 32. Kc3 {[%emt 0:00:01]} Nf5 {[%emt 0:00:14]} 33. Rh5 {[%emt 0:01:03]} Nxe3 {[%emt 0: 00:26]} 34. Rh7 {[%emt 0:00:10]} Nd1+ {[%emt 0:00:04]} 35. Kd3 {[%emt 0:00:02]} Nxb2+ {[%emt 0:00:03]} 36. Ke3 {[%emt 0:00:01]} Rg2 {[%emt 0:00:18]} 37. Ne5 { [%emt 0:00:23]} Nc4+ {[%emt 0:00:06]} 38. Nxc4+ {[%emt 0:00:01]} dxc4 {[%emt 0: 00:01]} 39. Rxb7 {[%emt 0:00:03]} Rxa2 {[%emt 0:00:05]} 40. Rb4 {[%emt 0:00:06] } c3 {[%emt 0:00:13]} 41. Rc4 {[%emt 0:00:29]} Rh2 {[%emt 0:00:06]} 42. Kd3 { [%emt 0:00:45]} c2 {[%emt 0:00:02]} 43. Rc8 {[%emt 0:00:02]} a5 {[%emt 0:00:04] } 44. Rc4 {[%emt 0:00:09]} a4 {[%emt 0:00:05]} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "18.4"] [White "Yip, Carissa"] [Black "Abdusattorov, Nodirbek"] [Result "0-1"] [ECO "B19"] [WhiteElo "2430"] [BlackElo "2627"] [Annotator "TA"] [PlyCount "70"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 28,70,32,0,7,0,-22,-29,-30,-127,-124,-127,-122,-125,-116,-127,-77,-220, -125,-259,-259,-245,-257,-254,-256,-656,-651,-656,-671,-600,0,0,298,-724,-717, -708,-693,-725,-727,-797,-794,-919,-885,-1160,-1133]} 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Nf3 Nd7 7. h4 h6 8. h5 Bh7 9. Bd3 Bxd3 10. Qxd3 e6 11. Bd2 Ngf6 12. O-O-O Be7 13. Kb1 O-O 14. Ne4 c5 15. dxc5 (15. g4 $5) 15... Nxc5 {B19: Classical Caro-Kann: 4...Bf5 main line.} 16. Nxc5 Bxc5 17. Qe2 { aiming for Bxh6!} Qb6 {[#] Black has an edge.} 18. c4 $146 (18. Ne5 $11) ({ Predecessor:} 18. Ne5 Rfd8 19. f4 Rac8 20. g4 Bd4 21. c3 Bxe5 22. fxe5 Nd5 23. Qf3 Qc6 24. Rhf1 Rd7 25. g5 Rcd8 26. gxh6 Nxc3+ 27. bxc3 Rxd2 28. Qxf7+ { 1-0 (28) Womacka,M (2435)-Rozum,I (2566) chess.com INT 2020}) 18... Ng4 $17 19. Rhf1 Nxf2 20. Rde1 Rad8 $40 {[%mdl 128] Strongly threatening ...Nd3! Black attacks with force.} 21. Bc3 Rfe8 22. g4 (22. Nd2 $17) 22... Rd3 (22... Nxg4 $19 23. Nd2 f5) 23. Bxg7 Kxg7 $19 24. g5 e5 {White must now prevent ...e4.} 25. gxh6+ Qxh6 (25... Kxh6 26. Nxe5 Qf6 27. Qxd3 $11) 26. Rg1+ $2 (26. Nxe5 f6 27. Rxf2 Rxe5 {[%mdl 64] Double Attack} 28. Rg1+ Rg5 29. Rxg5+ Qxg5 30. h6+ Kxh6 31. Rxf6+ (31. Rh2+ $2 Kg7 $19) 31... Qxf6 32. Qxd3) 26... Kf8 27. Nxe5 { [#] Nd7+! would kill now.} Re7 {[%mdl 512]} 28. Qc2 (28. Ka1 Re3) 28... Rd2 ( 28... Re3 $19 29. Qf5 R7xe5 30. Qc8+ Ke7 31. Qxb7+ Kf6) 29. Qf5 $11 {Intending Qc8+ and mate.} Qb6 $2 {[%mdl 8192]} (29... Rc7 30. Ng6+ (30. Nxf7 $2 Rxb2+ { [%mdl 64] Clearance} 31. Kxb2 Qd2+ 32. Qc2 Nd3+ {[%mdl 64] Double Attack, Discovered Attack} 33. Kb1 Qxc2+ 34. Kxc2 Nxe1+ 35. Rxe1 Kxf7 $19) 30... Qxg6 31. hxg6 Bd4 32. g7+ (32. gxf7 $2 {leads to mate.} Rxb2+ 33. Kc1 Rxc4+ 34. Qc2 Rcxc2#) 32... Bxg7 33. Qh7 Re7 34. Qxg7+ Ke8 35. Rxe7+ Kxe7 36. Qg5+ {[%mdl 64] Double Attack} f6 37. Re1+ Kd7 38. Qxd2+ {[%mdl 64] Double Attack}) (29... Rxb2+ $11 30. Kxb2 Qd2+ 31. Kb3 (31. Kb1 Qb4+ 32. Kc2 Qa4+ {[%mdl 64] Double Attack} 33. Kc3 Qa3+ 34. Kc2 Qxa2+ 35. Kc3 Qa3+ 36. Kc2 Qa2+ 37. Kc3 Bd4+ { [%mdl 64] Decoy} 38. Kxd4 Qd2+ 39. Kc5 Rc7+ 40. Kb5 a6+ 41. Kb6 Qd6+ 42. Nc6 Qxc6+ {[%mdl 64] Double Attack} 43. Ka5 b6+ 44. Kb4 Qxc4+ 45. Ka3 Qc3+ 46. Ka2 Rc5 $19) 31... Qb4+ 32. Kc2 Qa4+ {[%mdl 64] Double Attack} 33. Kc1 (33. Kb1 Qb4+ 34. Kc2 Qa4+ {[%mdl 64] Double Attack} 35. Kc1 Qa3+ 36. Kb1 Qb4+ 37. Kc2 $11) 33... Qa3+ 34. Kb1 Qb4+ 35. Kc2 Qa4+ {[%mdl 64] Double Attack} 36. Kc1 ( 36. Kb1 Qb4+ 37. Kc2 $11) 36... Qa3+ 37. Kb1 Qb4+ 38. Kc2) 30. Qc8+ $4 { [%mdl 8192]} (30. b3 $18 Ne4 31. Rxe4) 30... Rd8 $19 {Black is clearly winning. } 31. Qf5 {[#]} Nd3 $1 {[%mdl 576] Discovered Attack} 32. Nxd3 (32. Ng6+ Ke8) 32... Bxg1 33. Rxe7 Kxe7 34. h6 Qxh6 35. Qe5+ Kf8 {Weighted Error Value: White=0.95/Black=0.71} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "18.5"] [White "Praggnanandhaa R"] [Black "Khademalsharieh, Sarasadat"] [Result "1-0"] [ECO "A07"] [WhiteElo "2608"] [BlackElo "2494"] [Annotator "TA"] [PlyCount "123"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,123,16,29,31,52,44,49,43,50,28,23,28,31,20,54,25,30,12,42,21,18,14,24, 12,15,13,23,26,93,35,46,25,29,12,21,0,28,22,31,0,10,10,18,0,0,0,0,0,0,0,0,0,0, 0,8,15,106,108,106,114,114,0,0,0,124,124,342,252,260,262,299,268,340,340,340, 318,606,622,613,599,555,475,448,429,417,346,469,458,1148,1134,1091,1069,1991, 1219,1964,1916,1804,1751,1573,1325,1826,950,1455,1410,1255,1254,1041,952,921, 898,1922,1861,1860,1767,1140,884]} 1. Nf3 d5 2. g3 g6 3. Bg2 c6 4. d4 Nd7 5. b3 {[#]} Nh6 $146 ({Predecessor:} 5... Bg7 6. Bb2 Ngf6 7. O-O O-O 8. Nbd2 Qc7 9. Re1 e5 10. dxe5 Ng4 11. h3 Ngxe5 12. Nxe5 Nxe5 {1-0 (22) Manthey,W (1637) -Gehrmann,R (1964) Halberstadt 2015}) 6. O-O {A07: Réti Opening: New York and Capablanca Systems.} Nf5 7. Bb2 Bg7 8. c4 {White is slightly better.} O-O 9. cxd5 cxd5 10. Nc3 Nf6 11. Ne5 Be6 12. Na4 Nd7 13. Qd2 Rc8 14. Rac1 Rxc1 15. Rxc1 Nxe5 16. dxe5 b6 17. e3 Qb8 18. f4 h5 (18... Rd8 $1 $11) 19. Nc3 (19. Rc3 $16) 19... Rd8 $14 20. Nb5 (20. Nxd5 Bxd5 21. Bxd5 e6 $17) 20... Bd7 21. Nd4 ( 21. Qxd5 $2 Nxe3 22. Qe4 Nxg2 $19) (21. Na3 {keeps more tension.} Qb7 22. Bf1 Bf8 23. Bd3 Ng7 24. Nb5) 21... Nxd4 22. exd4 e6 23. Ba3 Rc8 24. Bf1 Rxc1 25. Qxc1 Bf8 26. Bxf8 Qxf8 27. Qc7 {[%mdl 64] [#] Double Attack} Qb4 28. Qxd7 { Strongly threatening Kg2.} Qxd4+ 29. Kg2 Qe4+ 30. Kf2 Qd4+ 31. Ke2 {Threatens to win with Qc8+.} Qb2+ 32. Kf3 Qc3+ (32... Qxa2 $11 {remains equal.} 33. Qb5 Qxh2) 33. Kg2 $16 {aiming for Qd8+.} Qc2+ 34. Kg1 Qc5+ 35. Kg2 Qc2+ 36. Kg1 Qc5+ $1 37. Kh1 a6 $2 {Black cannot hold the game after this.} (37... Qf2) 38. Qb7 ({And not} 38. Bxa6 Qc1+ 39. Kg2 Qc2+ 40. Kh3 Qf5+ 41. Kg2 Qc2+ 42. Kf3 Qc3+ 43. Kf2 (43. Kg2 Qc2+ $11) 43... Qc5+ 44. Kf3 Qc3+ 45. Kf2 (45. Kg2 Qc2+ $11) 45... Qc5+ 46. Kg2 Qc2+ $11) 38... a5 39. Qa6 Qc1 40. Qd3 Qb2 41. a4 Qc1 42. Kg2 g5 $2 (42... Kg7 43. Be2 Qe1) 43. fxg5 $18 Qxg5 44. Qd4 Qc1 45. Qxb6 Qb2+ 46. Kg1 Qxe5 47. Qc5 Qb2 48. Qe3 {White is clearly winning.} d4 (48... Qg7 $142 49. b4 axb4) 49. Qg5+ {[%mdl 64] [#] Double Attack} Kf8 50. Qxa5 h4 51. Qd8+ Kg7 52. Qg5+ Kf8 53. Qxh4 Qd2 54. Qe4 Qb4 55. Qd3 e5 56. Qb5 Qe1 57. Qe2 Qa5 58. Bg2 Qc5 59. Qc4 Qa3 60. Be4 Qa1+ 61. Kg2 Qe1 62. Qc2 {Weighted Error Value: White=0.17/Black=0.26} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "18.6"] [White "Salimova, Nurgyul"] [Black "Abdumalik, Zhansaya"] [Result "1-0"] [ECO "D02"] [WhiteElo "2397"] [BlackElo "2472"] [Annotator "ChessBase"] [PlyCount "79"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] [TimeControl "600+5"] {[%evp 0,75,18,18,27,27,47,5,7,13,5,-16,2,18,10,-20,-23,-10,-8,-5,0,-25,-4,-48, 13,-5,6,11,3,6,51,59,71,56,88,40,169,173,120,37,70,70,62,61,107,135,147,154, 154,151,164,168,190,245,285,394,433,-82,112,246,260,49,197,328,532,572,841,978, 978,994,1014,1032,1107,627,1066,923,958,869]} 1. d4 {[%emt 0:00:00]} Nf6 { [%emt 0:00:00]} 2. Nf3 {[%emt 0:00:00]} g6 {[%emt 0:00:00]} 3. Nbd2 {[%emt 0: 00:01]} d5 {[%emt 0:00:00]} 4. e3 {[%emt 0:00:17]} Bg7 {[%emt 0:00:03]} 5. b4 { [%emt 0:00:14]} a5 {[%emt 0:00:22]} 6. b5 {[%emt 0:00:08]} c5 {[%emt 0:00:18]} 7. bxc6 {[%emt 0:00:29]} Nxc6 {[%emt 0:01:10]} 8. Be2 {[%emt 0:01:29]} O-O { [%emt 0:00:24]} 9. O-O {[%emt 0:00:09]} Bf5 {[%emt 0:00:05]} 10. a3 {[%emt 0: 01:12]} Rc8 {[%emt 0:00:18]} 11. c4 {[%emt 0:00:48]} Re8 {[%emt 0:01:29]} 12. Bb2 {[%emt 0:00:26]} Qb6 {[%emt 0:00:22]} 13. Ra2 {[%emt 0:00:29]} dxc4 { [%emt 0:00:50]} 14. Bxc4 {[%emt 0:00:40]} h6 {[%emt 0:00:27]} 15. d5 {[%emt 0: 01:13]} Nb8 {[%emt 0:00:05]} 16. Bd4 {[%emt 0:00:07]} Qd8 {[%emt 0:01:12]} 17. Qb3 {[%emt 0:00:18]} Ne4 {[%emt 0:00:09]} 18. Bxg7 {[%emt 0:00:26]} Kxg7 { [%emt 0:00:13]} 19. Nd4 {[%emt 0:00:17]} Nc5 {[%emt 0:01:03]} 20. Nxf5+ { [%emt 0:00:04]} gxf5 {[%emt 0:00:01]} 21. Qb2+ {[%emt 0:00:08]} f6 {[%emt 0:00: 12]} 22. Nf3 {[%emt 0:00:37]} Rg8 {[%emt 0:00:56]} 23. Nd4 {[%emt 0:00:09]} Qd7 {[%emt 0:00:01]} 24. Qb1 {[%emt 0:00:34]} Ne4 {[%emt 0:00:08]} 25. Rc2 { [%emt 0:00:14]} Na6 {[%emt 0:00:28]} 26. Rfc1 {[%emt 0:00:24]} Nac5 {[%emt 0: 00:13]} 27. Bb5 {[%emt 0:00:18]} Qxd5 {[%emt 0:00:21]} 28. f3 {[%emt 0:00:26]} Ng5 {[%emt 0:00:12]} 29. Bc4 {[%emt 0:00:26]} Qe5 {[%emt 0:00:04]} 30. Re2 { [%emt 0:00:04]} Nge6 {[%emt 0:00:28]} 31. f4 {[%emt 0:00:16]} Nxf4 {[%emt 0:00: 36]} 32. Nxf5+ {[%emt 0:00:01]} Kh8 {[%emt 0:00:18]} 33. exf4 {[%emt 0:00:03]} Qxf4 {[%emt 0:00:00]} 34. Bxg8 {[%emt 0:00:02]} Rxg8 {[%emt 0:00:09]} 35. Rxc5 {[%emt 0:00:04]} e6 {[%emt 0:00:01]} 36. Qf1 {[%emt 0:00:08]} Qg4 {[%emt 0:00: 07]} 37. Nxh6 {[%emt 0:00:07]} Qd4+ {[%emt 0:00:01]} 38. Kh1 {[%emt 0:00:05]} Rg6 {[%emt 0:00:01]} 39. Rc8+ {[%emt 0:00:10]} Kg7 {[%emt 0:00:04]} 40. Rg8+ { [%emt 0:00:03]} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "18.8"] [White "Liang, Awonder"] [Black "Keymer, Vincent"] [Result "0-1"] [ECO "B17"] [WhiteElo "2592"] [BlackElo "2591"] [Annotator "ChessBase"] [PlyCount "98"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] [TimeControl "600+5"] {[%evp 0,98,18,33,83,76,76,34,38,31,31,11,11,13,31,29,33,31,41,52,56,51,43,22, 26,30,36,33,39,41,50,4,85,14,70,49,67,49,76,42,40,43,38,43,12,7,25,6,15,9,4, -11,-7,-13,-5,-14,0,0,0,0,0,-19,34,16,3,0,0,-96,0,0,28,-104,-105,-103,-79,-110, -81,-85,-58,-103,-57,-60,-39,-110,-131,-129,-188,-215,-216,-205,-234,-290,-234, -242,-198,-246,-262,-262,-261,-356,-373]} 1. e4 {[%emt 0:00:00]} c6 {[%emt 0: 00:00]} 2. Nc3 {[%emt 0:00:00]} d5 {[%emt 0:00:00]} 3. Nf3 {[%emt 0:00:00]} dxe4 {[%emt 0:00:00]} 4. Nxe4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 5. Ng3 { [%emt 0:00:01]} g6 {[%emt 0:00:06]} 6. d4 {[%emt 0:00:02]} Bg7 {[%emt 0:00:01]} 7. Bc4 {[%emt 0:01:02]} O-O {[%emt 0:00:05]} 8. O-O {[%emt 0:00:01]} Nbd7 { [%emt 0:00:28]} 9. Re1 {[%emt 0:00:03]} Nb6 {[%emt 0:00:35]} 10. Bb3 {[%emt 0: 00:02]} a5 {[%emt 0:00:07]} 11. c3 {[%emt 0:00:30]} a4 {[%emt 0:00:59]} 12. Bc2 {[%emt 0:00:02]} Bg4 {[%emt 0:00:13]} 13. h3 {[%emt 0:00:04]} Bxf3 {[%emt 0:00: 14]} 14. Qxf3 {[%emt 0:00:01]} Re8 {[%emt 0:00:06]} 15. Bf4 {[%emt 0:00:25]} Ra5 {[%emt 0:01:30]} 16. Rad1 {[%emt 0:00:13]} Nc4 {[%emt 0:00:26]} 17. b3 { [%emt 0:00:30]} axb3 {[%emt 0:00:04]} 18. axb3 {[%emt 0:00:19]} Nb6 {[%emt 0: 00:01]} 19. Ne4 {[%emt 0:01:17]} Nxe4 {[%emt 0:00:11]} 20. Bxe4 {[%emt 0:00:02] } Ra3 {[%emt 0:00:14]} 21. Bc2 {[%emt 0:01:42]} e6 {[%emt 0:00:27]} 22. Be5 { [%emt 0:00:11]} Nd5 {[%emt 0:00:34]} 23. Bxg7 {[%emt 0:00:19]} Kxg7 {[%emt 0: 00:04]} 24. c4 {[%emt 0:00:01]} Nf6 {[%emt 0:00:12]} 25. Qc3 {[%emt 0:00:09]} Qa5 {[%emt 0:00:11]} 26. Qg3 {[%emt 0:00:36]} Ra2 {[%emt 0:00:37]} 27. Bb1 { [%emt 0:00:06]} Rd2 {[%emt 0:00:23]} 28. Qe5 {[%emt 0:00:19]} Qc3 {[%emt 0:00: 38]} 29. Rxd2 {[%emt 0:00:39]} Qxd2 {[%emt 0:00:00]} 30. Re3 {[%emt 0:00:12]} Qd1+ {[%emt 0:01:03]} 31. Kh2 {[%emt 0:00:02]} Qh5 {[%emt 0:00:03]} 32. Qg3 { [%emt 0:00:30]} Rd8 {[%emt 0:00:16]} 33. Qf4 {[%emt 0:00:19]} Qh6 {[%emt 0:00: 13]} 34. Qe5 {[%emt 0:00:23]} Qh5 {[%emt 0:00:26]} 35. Qf4 {[%emt 0:00:05]} Qd1 {[%emt 0:00:14]} 36. Bd3 {[%emt 0:00:05]} Qa1 {[%emt 0:00:05]} 37. d5 {[%emt 0: 00:54]} cxd5 {[%emt 0:00:03]} 38. c5 {[%emt 0:00:01]} Qa7 {[%emt 0:00:11]} 39. Qd4 {[%emt 0:00:17]} Qb8+ {[%emt 0:00:07]} 40. f4 {[%emt 0:00:06]} h6 {[%emt 0: 01:25]} 41. g4 {[%emt 0:00:12]} g5 {[%emt 0:00:29]} 42. Re5 {[%emt 0:00:02]} Kg8 {[%emt 0:00:11]} 43. Re2 {[%emt 0:00:49]} Qxf4+ {[%emt 0:00:05]} 44. Qxf4 { [%emt 0:00:01]} gxf4 {[%emt 0:00:00]} 45. Ra2 {[%emt 0:00:03]} Nd7 {[%emt 0:00: 09]} 46. b4 {[%emt 0:00:02]} b6 {[%emt 0:00:06]} 47. c6 {[%emt 0:00:15]} Ne5 { [%emt 0:00:01]} 48. Bb5 {[%emt 0:00:03]} Rc8 {[%emt 0:00:01]} 49. Rc2 {[%emt 0: 00:08]} Nf3+ {[%emt 0:00:03]} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "18.9"] [White "Yoo, Christopher Woojin"] [Black "Gukesh D"] [Result "0-1"] [ECO "D38"] [WhiteElo "2455"] [BlackElo "2578"] [Annotator "Shahid"] [PlyCount "114"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] [TimeControl "600+5"] {[%evp 0,114,14,18,27,24,23,6,6,-24,5,17,9,9,33,38,57,36,60,43,74,73,53,47,48, 48,48,80,10,13,46,50,64,45,75,67,76,60,89,88,88,69,85,89,92,116,100,170,171,51, 258,250,275,155,157,166,179,-195,-188,-188,-194,-204,-215,-200,-215,-249,-233, -306,-328,-338,-305,-352,-371,-367,-369,-389,-387,-387,-389,-389,-378,-395, -367,-414,-396,-422,-367,-421,-413,-422,-396,-451,-451,-455,-396,-476,-476, -476,-475,-474,-472,-470,-474,-476,-476,-474,-476,-492,-642,-661,-658,-952, -952,-1018,-1046,-29991,-29992]} 1. d4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 2. Nf3 {[%emt 0:00:00]} d5 {[%emt 0:00:16]} 3. c4 {[%emt 0:00:02]} e6 {[%emt 0:00: 03]} 4. Nc3 {[%emt 0:00:02]} Bb4 {[%emt 0:00:42]} 5. Qb3 {[%emt 0:00:30]} c5 { [%emt 0:00:23]} 6. dxc5 {[%emt 0:00:05]} Nc6 {[%emt 0:00:19]} 7. Bg5 {[%emt 0: 00:03]} O-O {[%emt 0:01:12]} 8. e3 {[%emt 0:01:00]} h6 {[%emt 0:00:29]} 9. Bxf6 {[%emt 0:00:07]} Qxf6 {[%emt 0:00:01]} 10. cxd5 {[%emt 0:00:18]} exd5 {[%emt 0: 00:04]} 11. Bb5 {[%emt 0:00:06]} d4 {[%emt 0:02:02]} 12. Bxc6 {[%emt 0:00:29]} dxc3 {[%emt 0:00:02]} 13. Qxb4 {[%emt 0:00:03]} cxb2 {[%emt 0:00:02]} 14. Rb1 { [%emt 0:00:01]} bxc6 {[%emt 0:00:49]} 15. O-O {[%emt 0:00:19]} Ba6 {[%emt 0:00: 29]} 16. Rfe1 {[%emt 0:00:04]} Rab8 {[%emt 0:00:33]} 17. Qa3 {[%emt 0:00:06]} Bc4 {[%emt 0:00:37]} 18. Nd4 {[%emt 0:00:04]} Qg5 {[%emt 0:00:17]} 19. Rxb2 { [%emt 0:00:35]} Rxb2 {[%emt 0:00:02]} 20. Qxb2 {[%emt 0:00:00]} Qxc5 {[%emt 0: 00:44]} 21. Qc3 {[%emt 0:00:20]} Rb8 {[%emt 0:00:41]} (21... Qd5 22. e4) 22. a3 {[%emt 0:00:15]} f6 {[%emt 0:00:37]} 23. e4 {[%emt 0:01:49]} Re8 {[%emt 0:00: 06]} 24. h3 {[%emt 0:00:35]} Kh8 {[%emt 0:01:02]} 25. Nf5 {[%emt 0:00:43]} Rd8 {[%emt 0:00:24]} 26. Ne3 {[%emt 0:00:15]} Rd4 {[%emt 0:00:07]} 27. Rc1 { [%emt 0:00:03]} Qe5 {[%emt 0:00:01]} 28. Nxc4 $4 {[%emt 0:00:07]} (28. f4 Qxe4 29. Nxc4) 28... Rd1+ $19 {[%emt 0:00:01]} 29. Rxd1 {[%emt 0:00:32]} Qxc3 { [%emt 0:00:01]} 30. Ne3 {[%emt 0:00:06]} Qxa3 {[%emt 0:00:09]} 31. Nf5 { [%emt 0:00:13]} Qa5 {[%emt 0:00:07]} 32. Nd6 {[%emt 0:01:26]} Kg8 {[%emt 0:00: 04]} 33. h4 {[%emt 0:00:10]} Qa4 {[%emt 0:00:06]} 34. Rc1 {[%emt 0:00:26]} h5 { [%emt 0:00:07]} 35. g3 {[%emt 0:00:18]} a5 {[%emt 0:00:02]} 36. Kg2 {[%emt 0: 00:07]} Qd4 {[%emt 0:00:03]} 37. Rxc6 {[%emt 0:00:03]} a4 {[%emt 0:00:01]} 38. Ra6 {[%emt 0:00:49]} a3 {[%emt 0:00:08]} 39. Rxa3 {[%emt 0:00:37]} Qxd6 { [%emt 0:00:01]} 40. Re3 {[%emt 0:00:04]} Qe5 {[%emt 0:00:05]} 41. Kg1 {[%emt 0: 00:09]} Kh7 {[%emt 0:00:02]} 42. Kg2 {[%emt 0:00:02]} Kg6 {[%emt 0:00:02]} 43. Kg1 {[%emt 0:00:01]} Kf7 {[%emt 0:00:06]} 44. Kg2 {[%emt 0:00:01]} Ke6 { [%emt 0:00:02]} 45. Kg1 {[%emt 0:00:10]} Qd4 {[%emt 0:00:02]} 46. Kg2 {[%emt 0: 00:02]} Ke5 {[%emt 0:00:05]} 47. Kg1 {[%emt 0:00:04]} Qd1+ {[%emt 0:00:10]} 48. Kg2 {[%emt 0:00:02]} Kd4 {[%emt 0:00:02]} 49. e5 {[%emt 0:00:05]} fxe5 { [%emt 0:00:02]} 50. Rf3 {[%emt 0:00:08]} Qc2 {[%emt 0:00:11]} 51. Rf7 {[%emt 0: 00:08]} Qc6+ {[%emt 0:00:02]} 52. Kg1 {[%emt 0:00:08]} g6 {[%emt 0:00:02]} 53. Kh2 {[%emt 0:00:04]} Kd3 {[%emt 0:00:02]} 54. Kg1 {[%emt 0:00:04]} Ke2 { [%emt 0:00:04]} 55. Rf8 {[%emt 0:00:05]} Qc1+ {[%emt 0:00:03]} 56. Kh2 { [%emt 0:00:02]} Qc5 {[%emt 0:00:04]} 57. Kg2 {[%emt 0:00:04]} Qxf8 {[%emt 0:00: 03]} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "18.10"] [White "Shuvalova, Polina"] [Black "Bjerre, Jonas Buhl"] [Result "0-1"] [ECO "D38"] [WhiteElo "2476"] [BlackElo "2550"] [Annotator "RC"] [PlyCount "176"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] [TimeControl "600+5"] {[%evp 0,98,26,26,24,6,6,6,21,20,33,12,19,-3,30,49,33,61,46,46,27,-76,0,28,21, 27,29,32,28,21,17,17,27,9,33,7,16,20,12,-4,19,-9,-11,-14,-18,-55,-19,-48,-64, -49,-49,-64,-21,-51,-42,-173,-142,-180,-174,-192,-201,-201,-166,-143,-147,-130, -130,-130,-137,-137,-108,-179,-191,-268,-262,-265,-272,-277,-261,-316,-306, -327,-286,-288,-287,-293,-255,-298,-341,-337,-203,-206,-185,-181,-181,-225, -246,-269,-199,-201,-187]} 1. d4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 2. c4 { [%emt 0:00:00]} e6 {[%emt 0:00:00]} 3. Nf3 {[%emt 0:00:00]} d5 {[%emt 0:00:00]} 4. Nc3 {[%emt 0:00:02]} Bb4 {[%emt 0:00:06]} 5. Qb3 {[%emt 0:00:06]} c5 { [%emt 0:00:27]} 6. dxc5 {[%emt 0:00:09]} Nc6 {[%emt 0:00:23]} 7. Bg5 {[%emt 0: 00:19]} Qa5 {[%emt 0:00:22]} 8. Bxf6 {[%emt 0:00:14]} dxc4 {[%emt 0:00:05]} 9. Qxc4 {[%emt 0:00:01]} gxf6 {[%emt 0:00:01]} 10. g3 {[%emt 0:01:23]} Qxc5 { [%emt 0:01:35]} 11. Qxc5 {[%emt 0:00:11]} Bxc5 {[%emt 0:00:02]} 12. Bg2 { [%emt 0:00:01]} Bd7 {[%emt 0:00:31]} 13. O-O {[%emt 0:00:09]} O-O-O {[%emt 0: 00:25]} 14. Rac1 {[%emt 0:00:15]} Be7 {[%emt 0:00:17]} 15. Rfd1 {[%emt 0:00:02] } Kb8 {[%emt 0:00:12]} 16. a3 {[%emt 0:00:47]} f5 {[%emt 0:00:38]} 17. e3 { [%emt 0:00:08]} Bc8 {[%emt 0:00:21]} 18. h4 {[%emt 0:00:46]} h6 {[%emt 0:00:24] } 19. Nb5 {[%emt 0:00:58]} a6 {[%emt 0:01:03]} 20. Nbd4 {[%emt 0:00:06]} Nxd4 { [%emt 0:00:06]} 21. exd4 {[%emt 0:00:05]} f4 {[%emt 0:00:50]} 22. gxf4 { [%emt 0:01:53]} Rhg8 {[%emt 0:00:08]} 23. Ne5 {[%emt 0:00:56]} f6 {[%emt 0:00: 19]} 24. Nc4 {[%emt 0:00:09]} Bd7 {[%emt 0:01:21]} 25. Ne3 {[%emt 0:00:37]} Bd6 {[%emt 0:00:26]} 26. f5 {[%emt 0:00:35]} exf5 {[%emt 0:00:18]} 27. Nc4 { [%emt 0:00:32]} Bf4 {[%emt 0:00:11]} 28. Rc3 {[%emt 0:00:41]} Ba4 {[%emt 0:00: 32]} 29. Rdd3 {[%emt 0:00:22]} Bc6 {[%emt 0:00:21]} 30. f3 {[%emt 0:00:01]} Rg7 {[%emt 0:00:09]} 31. Kf1 {[%emt 0:00:12]} Rgd7 {[%emt 0:00:22]} 32. Bh3 { [%emt 0:00:08]} Rxd4 {[%emt 0:00:10]} 33. Rxd4 {[%emt 0:00:08]} Rxd4 {[%emt 0: 00:03]} 34. Bxf5 {[%emt 0:00:01]} Bc7 {[%emt 0:00:14]} 35. h5 {[%emt 0:00:12]} Rf4 {[%emt 0:00:05]} 36. Bg4 {[%emt 0:00:11]} f5 {[%emt 0:00:06]} 37. Bh3 { [%emt 0:00:01]} Bxf3 {[%emt 0:00:02]} 38. Ke1 {[%emt 0:00:13]} Bxh5 {[%emt 0: 00:03]} 39. Ne3 {[%emt 0:00:06]} Be5 {[%emt 0:00:07]} 40. Rb3 {[%emt 0:00:06]} Bf7 {[%emt 0:00:13]} 41. Rd3 {[%emt 0:00:02]} Bxb2 {[%emt 0:00:07]} 42. Nxf5 { [%emt 0:00:02]} Be6 {[%emt 0:00:10]} 43. Nd6 {[%emt 0:00:28]} Bxh3 {[%emt 0:00: 03]} 44. Rxh3 {[%emt 0:00:00]} Rf6 {[%emt 0:00:06]} 45. Nc4 {[%emt 0:00:03]} Bd4 {[%emt 0:00:02]} 46. Kd2 {[%emt 0:00:03]} b5 {[%emt 0:00:04]} 47. Na5 { [%emt 0:00:01]} Bc5 {[%emt 0:00:04]} 48. Kc2 {[%emt 0:00:05]} Bb6 {[%emt 0:00: 06]} 49. Nb3 {[%emt 0:00:02]} Rc6+ {[%emt 0:00:03]} 50. Kb2 {[%emt 0:00:03]} Re6 {[%emt 0:00:02]} 51. Nc1 {[%emt 0:00:05]} Bd4+ {[%emt 0:00:07]} 52. Ka2 { [%emt 0:00:06]} Kb7 {[%emt 0:00:06]} 53. a4 {[%emt 0:00:10]} b4 {[%emt 0:00:08] } 54. Rh4 {[%emt 0:00:09]} Bc3 {[%emt 0:00:11]} 55. Nd3 {[%emt 0:00:04]} Rd6 { [%emt 0:00:05]} 56. Nc5+ {[%emt 0:00:20]} Kb6 {[%emt 0:00:05]} 57. Ne4 { [%emt 0:00:02]} Rc6 {[%emt 0:00:02]} 58. Kb3 {[%emt 0:00:02]} a5 {[%emt 0:00: 02]} 59. Rh5 {[%emt 0:00:03]} Bd4 {[%emt 0:00:03]} 60. Rd5 {[%emt 0:00:02]} Be3 {[%emt 0:00:04]} 61. Rb5+ {[%emt 0:00:02]} Ka6 {[%emt 0:00:01]} 62. Re5 { [%emt 0:00:02]} Bd4 {[%emt 0:00:04]} 63. Rd5 {[%emt 0:00:02]} Bb6 {[%emt 0:00: 01]} 64. Rh5 {[%emt 0:00:11]} Re6 {[%emt 0:00:03]} 65. Nd2 {[%emt 0:00:08]} Re3+ {[%emt 0:00:01]} 66. Kc2 {[%emt 0:00:05]} Rc3+ {[%emt 0:00:01]} 67. Kb2 { [%emt 0:00:01]} Be3 {[%emt 0:00:03]} 68. Nb3 {[%emt 0:00:03]} Bg5 {[%emt 0:00: 21]} 69. Rh2 {[%emt 0:00:10]} Re3 {[%emt 0:00:02]} 70. Rc2 {[%emt 0:00:06]} Kb6 {[%emt 0:00:04]} 71. Rf2 {[%emt 0:00:06]} Re5 {[%emt 0:00:07]} 72. Rf8 { [%emt 0:00:08]} Re2+ {[%emt 0:00:02]} 73. Kb1 {[%emt 0:00:01]} Re5 {[%emt 0:00: 11]} 74. Rb8+ {[%emt 0:00:02]} Kc6 {[%emt 0:00:04]} 75. Ra8 {[%emt 0:00:02]} h5 {[%emt 0:00:09]} 76. Nxa5+ {[%emt 0:00:04]} Kd5 {[%emt 0:00:06]} 77. Nb7 { [%emt 0:00:10]} Kc4 {[%emt 0:00:10]} 78. Na5+ {[%emt 0:00:14]} Kd3 {[%emt 0:00: 11]} 79. Nc6 {[%emt 0:00:03]} Re4 {[%emt 0:00:03]} 80. a5 {[%emt 0:00:06]} Bf6 {[%emt 0:00:04]} 81. Rf8 {[%emt 0:00:07]} Bc3 {[%emt 0:00:04]} 82. Ka2 { [%emt 0:00:04]} Kc4 {[%emt 0:00:04]} 83. Rf2 {[%emt 0:00:08]} Kb5 {[%emt 0:00: 03]} 84. Na7+ {[%emt 0:00:10]} Kxa5 {[%emt 0:00:04]} 85. Nc8 {[%emt 0:00:05]} Re6 {[%emt 0:00:05]} 86. Rf5+ {[%emt 0:00:01]} Ka4 {[%emt 0:00:01]} 87. Rf2 { [%emt 0:00:10]} b3+ {[%emt 0:00:03]} 88. Kb1 {[%emt 0:00:01]} Re1# {[%emt 0:00: 02]} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "19.1"] [White "Bjerre, Jonas Buhl"] [Black "Zhu, Jiner"] [Result "0-1"] [ECO "E07"] [WhiteElo "2550"] [BlackElo "2459"] [Annotator "ChessBase"] [PlyCount "72"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] [TimeControl "600+5"] {[%evp 0,72,20,15,23,6,6,21,6,-16,16,20,14,3,4,5,24,7,6,-10,-30,-17,-2,6,63,69, 48,71,60,55,98,87,87,79,99,30,109,66,78,0,-24,-43,-41,-73,-90,-95,-73,-87,-87, -87,-87,-78,-99,-98,-66,-82,-109,-131,-134,-157,-179,-231,-202,-215,-202,-285, -242,-257,-247,-280,-253,-300,-310,-307,-311]} 1. d4 {[%emt 0:00:00]} Nf6 { [%emt 0:00:00]} 2. c4 {[%emt 0:00:00]} e6 {[%emt 0:00:00]} 3. Nf3 {[%emt 0:00: 00]} d5 {[%emt 0:00:00]} 4. g3 {[%emt 0:00:00]} Bb4+ {[%emt 0:00:00]} 5. Bd2 { [%emt 0:00:01]} Be7 {[%emt 0:00:01]} 6. Bg2 {[%emt 0:00:01]} O-O {[%emt 0:00: 01]} 7. O-O {[%emt 0:00:01]} c6 {[%emt 0:00:01]} 8. Bf4 {[%emt 0:00:01]} Nbd7 { [%emt 0:00:24]} 9. Nc3 {[%emt 0:00:09]} dxc4 {[%emt 0:00:16]} 10. e4 {[%emt 0: 00:03]} a5 {[%emt 0:00:41]} 11. a4 {[%emt 0:00:23]} b5 {[%emt 0:02:07]} 12. axb5 {[%emt 0:01:22]} cxb5 {[%emt 0:00:01]} 13. d5 {[%emt 0:01:10]} exd5 { [%emt 0:02:04]} 14. exd5 {[%emt 0:00:02]} Bc5 {[%emt 0:00:29]} 15. Nxb5 { [%emt 0:00:10]} Qb6 {[%emt 0:00:35]} 16. Nfd4 {[%emt 0:01:20]} Ne8 {[%emt 0:01: 14]} 17. d6 {[%emt 0:01:47]} Rb8 {[%emt 0:00:02]} 18. Qd2 {[%emt 0:00:46]} Ba6 {[%emt 0:01:17]} 19. Bc6 {[%emt 0:01:17]} Nef6 {[%emt 0:01:28]} 20. Rxa5 { [%emt 0:00:43]} c3 {[%emt 0:00:16]} 21. Qxc3 {[%emt 0:00:08]} Bxb5 {[%emt 0:00: 12]} 22. Rxb5 {[%emt 0:00:33]} Bxd4 {[%emt 0:00:01]} 23. Rxb6 {[%emt 0:01:03]} Bxc3 {[%emt 0:00:03]} 24. Rxb8 {[%emt 0:00:10]} Nxb8 {[%emt 0:00:00]} 25. bxc3 {[%emt 0:00:21]} Nxc6 {[%emt 0:00:01]} 26. c4 {[%emt 0:00:00]} h6 {[%emt 0:00: 17]} 27. Ra1 {[%emt 0:00:06]} Rc8 {[%emt 0:00:19]} 28. Ra4 {[%emt 0:00:16]} Kf8 {[%emt 0:00:03]} 29. Ra6 {[%emt 0:00:07]} Ke8 {[%emt 0:00:06]} 30. Rb6 { [%emt 0:00:01]} Nd7 {[%emt 0:00:10]} 31. Rb7 {[%emt 0:00:12]} Na5 {[%emt 0:00: 02]} 32. Rb1 {[%emt 0:00:20]} Nxc4 {[%emt 0:00:03]} 33. Re1+ {[%emt 0:00:01]} Kf8 {[%emt 0:00:01]} 34. Re7 {[%emt 0:00:02]} Ncb6 {[%emt 0:00:02]} 35. Be3 { [%emt 0:00:03]} Rc6 {[%emt 0:00:11]} 36. Bxb6 {[%emt 0:00:21]} Nxb6 {[%emt 0: 00:01]} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "19.2"] [White "Gukesh D"] [Black "Shuvalova, Polina"] [Result "1-0"] [ECO "D02"] [WhiteElo "2578"] [BlackElo "2476"] [Annotator "Shahid"] [PlyCount "101"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] [TimeControl "600+5"] {[%evp 0,101,15,23,23,27,27,14,34,22,19,37,14,12,15,5,1,-10,-12,-9,-16,-4,-4,2, 21,27,17,17,23,25,18,24,29,23,49,15,18,20,15,-7,6,19,24,10,24,34,43,39,50,48, 97,61,40,55,51,70,70,72,93,38,38,56,56,77,55,0,0,0,0,0,21,21,13,18,19,22,22,3, 26,38,72,110,120,136,147,149,156,161,204,214,212,214,268,260,300,312,401,427, 438,451,498,525,621,650]} 1. d4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 2. Nf3 { [%emt 0:00:09]} e6 {[%emt 0:00:00]} 3. Bf4 {[%emt 0:00:02]} d5 {[%emt 0:00:09]} 4. e3 {[%emt 0:00:01]} Bd6 {[%emt 0:00:02]} 5. Nbd2 {[%emt 0:00:03]} O-O { [%emt 0:00:04]} 6. Bd3 {[%emt 0:00:22]} Bxf4 {[%emt 0:00:06]} 7. exf4 {[%emt 0: 00:02]} b6 {[%emt 0:00:01]} 8. Qe2 {[%emt 0:00:10]} c5 {[%emt 0:00:05]} 9. c3 { [%emt 0:00:05]} Nc6 {[%emt 0:00:14]} 10. Ne5 {[%emt 0:00:13]} Bb7 {[%emt 0:00: 09]} 11. Ndf3 {[%emt 0:00:18]} cxd4 {[%emt 0:00:05]} 12. Nxc6 {[%emt 0:00:03]} Bxc6 {[%emt 0:00:01]} 13. Nxd4 {[%emt 0:00:01]} Rc8 {[%emt 0:00:12]} 14. O-O { [%emt 0:00:10]} Nd7 {[%emt 0:00:49]} 15. Rfe1 {[%emt 0:00:30]} Nc5 {[%emt 0:00: 11]} 16. Bc2 {[%emt 0:00:56]} Qf6 {[%emt 0:00:06]} 17. Qg4 {[%emt 0:00:38]} Bd7 {[%emt 0:00:25]} 18. Re3 {[%emt 0:00:39]} h6 {[%emt 0:00:50]} 19. Re5 {[%emt 0: 00:24]} Ba4 {[%emt 0:00:11]} 20. b3 {[%emt 0:00:34]} Bd7 {[%emt 0:00:06]} 21. Rae1 {[%emt 0:00:10]} Rfe8 {[%emt 0:01:11]} 22. Qg3 {[%emt 0:00:14]} a5 { [%emt 0:00:41]} 23. h4 {[%emt 0:00:40]} b5 {[%emt 0:00:09]} 24. f5 {[%emt 0:00: 58]} exf5 {[%emt 0:01:07]} 25. Rxe8+ {[%emt 0:00:03]} Rxe8 {[%emt 0:00:47]} 26. Rxe8+ {[%emt 0:00:02]} Bxe8 {[%emt 0:00:01]} 27. Qb8 {[%emt 0:00:09]} Kf8 { [%emt 0:00:27]} 28. Nxb5 {[%emt 0:01:14]} Qxh4 {[%emt 0:02:37]} 29. Nc7 { [%emt 0:00:32]} Qe7 {[%emt 0:00:07]} 30. Nxd5 {[%emt 0:00:07]} Qe1+ {[%emt 0: 00:14]} 31. Kh2 {[%emt 0:00:01]} Qxf2 {[%emt 0:00:17]} 32. Qd6+ {[%emt 0:00:05] } Kg8 {[%emt 0:00:01]} 33. Bxf5 {[%emt 0:00:14]} Ne4 {[%emt 0:00:38]} 34. Qb8 { [%emt 0:01:10]} Kf8 {[%emt 0:00:13]} 35. Qe5 {[%emt 0:00:22]} Qh4+ {[%emt 0:00: 19]} 36. Bh3 {[%emt 0:00:04]} Nf2 {[%emt 0:00:13]} 37. Qd6+ {[%emt 0:01:04]} Kg8 {[%emt 0:00:01]} 38. Qg3 {[%emt 0:00:05]} Qxg3+ {[%emt 0:00:07]} 39. Kxg3 { [%emt 0:00:01]} Nd1 $2 {[%emt 0:00:04]} (39... Nxh3 40. gxh3) (39... Ne4+ 40. Kf4) (39... Nd3 40. Bf5) 40. Bg4 {[%emt 0:00:10]} Nb2 {[%emt 0:00:09]} 41. Be2 {[%emt 0:00:02]} Kf8 {[%emt 0:00:04]} 42. Kf4 {[%emt 0:00:07]} Bc6 {[%emt 0:00: 02]} 43. c4 {[%emt 0:00:12]} Ke8 {[%emt 0:00:11]} 44. Ke5 {[%emt 0:00:04]} Kd7 {[%emt 0:00:01]} 45. Kd4 {[%emt 0:00:02]} a4 {[%emt 0:00:01]} 46. Kc3 {[%emt 0: 00:04]} a3 {[%emt 0:00:02]} 47. Kb4 {[%emt 0:00:05]} f5 {[%emt 0:00:12]} 48. Kxa3 {[%emt 0:00:02]} Bxd5 {[%emt 0:00:01]} 49. cxd5 {[%emt 0:00:02]} g5 { [%emt 0:00:05]} 50. Kxb2 {[%emt 0:00:02]} g4 {[%emt 0:00:06]} 51. Bd3 {[%emt 0: 00:04]} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "19.3"] [White "Keymer, Vincent"] [Black "Yoo, Christopher Woojin"] [Result "0-1"] [ECO "A50"] [WhiteElo "2591"] [BlackElo "2455"] [Annotator "Shahid"] [PlyCount "86"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] [TimeControl "600+5"] {[%evp 0,86,18,23,27,6,22,30,32,8,34,39,39,39,39,39,80,49,19,22,62,30,17,5,67, 80,42,62,62,62,59,57,52,40,44,44,40,36,31,49,50,52,54,46,85,57,89,89,137,109, 115,100,101,100,117,55,59,-2,19,32,30,28,28,47,67,36,-10,-41,-32,-135,-60,-181, -187,-190,-152,-133,-128,-128,-130,-132,-123,-148,-153,-277,-280,-282,-289, -311,-308]} 1. d4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 2. c4 {[%emt 0:00:00]} b6 {[%emt 0:00:07]} 3. Nc3 {[%emt 0:00:09]} Bb7 {[%emt 0:00:01]} 4. Qc2 { [%emt 0:00:01]} d5 {[%emt 0:00:02]} 5. cxd5 {[%emt 0:00:01]} Nxd5 {[%emt 0:00: 01]} 6. e4 {[%emt 0:00:35]} Nxc3 {[%emt 0:00:03]} 7. bxc3 {[%emt 0:00:00]} e5 { [%emt 0:00:01]} 8. dxe5 {[%emt 0:00:44]} Nd7 {[%emt 0:00:03]} 9. Nf3 {[%emt 0: 00:07]} Qe7 {[%emt 0:00:03]} 10. Bb5 {[%emt 0:00:25]} O-O-O {[%emt 0:01:35]} 11. O-O {[%emt 0:00:12]} a6 {[%emt 0:02:20]} 12. Bxd7+ {[%emt 0:01:37]} Qxd7 { [%emt 0:01:13]} 13. Bg5 {[%emt 0:00:01]} Be7 {[%emt 0:00:02]} 14. Rad1 { [%emt 0:00:23]} Qe6 {[%emt 0:00:06]} 15. Bxe7 {[%emt 0:00:35]} Qxe7 {[%emt 0: 00:10]} 16. Rd4 {[%emt 0:00:02]} c5 {[%emt 0:01:26]} 17. Rxd8+ {[%emt 0:00:35]} Rxd8 {[%emt 0:00:00]} 18. h3 {[%emt 0:00:22]} h6 {[%emt 0:01:03]} 19. a4 { [%emt 0:01:00]} Bc6 {[%emt 0:00:20]} 20. Rb1 {[%emt 0:00:23]} b5 {[%emt 0:00: 10]} 21. axb5 {[%emt 0:00:08]} axb5 {[%emt 0:00:00]} 22. Ra1 {[%emt 0:00:56]} Qb7 {[%emt 0:00:34]} 23. Re1 {[%emt 0:00:43]} Qd7 {[%emt 0:01:09]} 24. Qa2 { [%emt 0:00:18]} Kb8 {[%emt 0:00:02]} 25. Qa3 {[%emt 0:00:58]} (25. e6 fxe6 ( 25... Qxe6 26. Qa5) 26. Ne5) 25... Qa7 {[%emt 0:00:18]} 26. Qc1 {[%emt 0:00:01] } Qa2 {[%emt 0:00:12]} 27. Qf4 {[%emt 0:00:21]} (27. Qe3 Qc4 28. e6) 27... Kb7 {[%emt 0:00:02]} 28. Nh4 {[%emt 0:00:52]} Qd2 {[%emt 0:00:43]} 29. Qxd2 { [%emt 0:00:28]} Rxd2 {[%emt 0:00:00]} 30. Nf5 {[%emt 0:00:00]} Kb6 {[%emt 0:00: 01]} 31. Nxg7 {[%emt 0:00:07]} b4 {[%emt 0:00:02]} 32. cxb4 {[%emt 0:00:01]} cxb4 {[%emt 0:00:00]} 33. Nf5 {[%emt 0:00:04]} b3 {[%emt 0:00:20]} 34. Nd6 { [%emt 0:00:13]} Bb5 {[%emt 0:00:09]} 35. Re3 {[%emt 0:00:13]} Rd1+ {[%emt 0:00: 15]} 36. Kh2 {[%emt 0:00:03]} b2 {[%emt 0:00:00]} 37. Rb3 {[%emt 0:00:01]} b1=Q {[%emt 0:00:02]} 38. Rxb1 {[%emt 0:00:01]} Rxb1 {[%emt 0:00:00]} 39. Nxf7 { [%emt 0:00:01]} h5 {[%emt 0:00:11]} 40. g4 {[%emt 0:00:25]} h4 {[%emt 0:00:06]} 41. g5 {[%emt 0:00:09]} Be2 {[%emt 0:00:11]} 42. Kg2 {[%emt 0:00:06]} Rb3 { [%emt 0:00:02]} 43. f4 {[%emt 0:00:14]} Bf3+ {[%emt 0:00:05]} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "19.4"] [White "Mendonca, Leon Luke"] [Black "Liang, Awonder"] [Result "1/2-1/2"] [ECO "A07"] [WhiteElo "2549"] [BlackElo "2592"] [Annotator "TA"] [PlyCount "159"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,159,-22,15,6,13,16,50,40,39,24,36,46,41,0,9,11,18,21,13,19,20,10,13, 31,44,22,15,20,15,32,25,0,-7,-73,-60,-74,-61,-71,-65,-68,-70,-55,-66,-69,-22, -28,377,-62,-56,-68,-50,-70,-21,-55,0,0,0,-69,-70,-160,-160,-150,-150,-146, -141,-256,-243,-276,-270,-235,-267,-267,-269,-270,-294,-294,-234,-255,-102, -564,-470,-4662,-4105,-2324,-1754,-4901,-4894,-4870,-4840,-4833,-4814,-4814, -4774,-4766,-8,-8,-7,-83,-8,-72,0,-228,-58,-35,-33,-63,-67,-600,-586,-4766, -4759,-1395,-83,-83,-83,-83,-83,-83,-83,-83,-83,-83,-60,-83,-67,-83,-79,-69, -75,-83,0,-83,0,-83,-83,-163,-8,-8,-8,-8,0,0,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 Nf6 2. g3 d5 3. Bg2 Nc6 4. d3 e5 5. a3 Be6 6. b4 {A07: Réti Opening: New York and Capablanca Systems.} Bd6 {[#]} 7. Bb2 $146 ({Predecessor:} 7. O-O Qd7 8. Bb2 O-O-O 9. b5 Ne7 10. Bxe5 h5 11. Bxd6 Qxd6 12. h4 Ng4 13. Nbd2 {1-0 (37) Mirzoev,A (2550)-Rodriguez Dobladez,V (1978) Balaguer 2005}) 7... a6 8. Nbd2 { White is slightly better.} Qd7 9. c4 d4 10. O-O Bh3 11. c5 Bxg2 12. Kxg2 Be7 13. Nc4 Qe6 14. Re1 e4 15. Nxd4 Nxd4 16. Bxd4 O-O-O 17. e3 h5 18. h3 Nh7 19. h4 ({Wrong is} 19. Qxh5 $2 Nf6 $19) 19... Bf6 20. Rc1 g5 21. dxe4 (21. c6 $11 b5 22. Nd2) 21... gxh4 $17 22. Qf3 Bxd4 23. exd4 Rxd4 24. Qf5 Qxf5 25. exf5 hxg3 26. fxg3 Ng5 (26... Rg8 {looks sharper.} 27. Red1 Rdg4 28. Rd3 h4 29. Kh3 hxg3 30. Kg2 Nf6) 27. Red1 Rhd8 {[%mdl 8192] [#]} (27... Re4 $11 {and Black is okay. }) 28. Rxd4 $2 (28. Nd6+ $1 $18 {[%mdl 512]} R4xd6 (28... R8xd6 29. cxd6 Rxd1 30. Rxd1 c6) (28... cxd6 29. cxd6+ Kd7 30. Rxd4) 29. cxd6) 28... Rxd4 $18 { [%mdl 4096] Endgame KRN-KRN} 29. Rc2 f6 30. Na5 Rg4 31. c6 b6 (31... b5 $15) 32. Re2 $1 $11 {[%CAl Re2e8]} Ne4 33. Nc4 (33. Kf3 $1 $11 Ng5+ 34. Kg2) 33... Kb8 $15 34. Ne3 (34. Kh2 $1 $15) 34... Rxg3+ $17 35. Kh2 Rf3 36. Kg2 Rf4 37. Nd5 (37. Re1 $17) 37... Rxf5 $19 38. Nxb6 Rg5+ 39. Kh2 cxb6 40. Rxe4 {KR-KR} Re5 41. Rf4 f5 42. Rh4 Kc7 43. Rxh5 Kxc6 (43... Re2+ $1 $19 44. Kg1 Re3) 44. Kg2 $2 {[%mdl 8192]} (44. Rh6+ $17 {nothing else works.} Kc7 45. Rh7+ Kd6 46. a4) 44... Kb5 45. Kf2 (45. Rh6 $142 Re2+ 46. Kf1) 45... Ka4 46. Rh6 Rb5 $1 47. Rh3 a5 48. bxa5 Rxa5 49. Ke2 Rd5 50. Rf3 b5 51. Ke1 Ka5 $2 (51... f4 $19 { Threatening ...Rd7.} 52. Ke2 Rd8) 52. Ke2 $11 Kb6 53. Rc3 (53. Rf4 $11) 53... Rd4 (53... f4 $17 54. Kf3 Rd4) 54. Ke3 (54. Rf3 $11 {keeps the balance.}) 54... Rc4 (54... Rd8 $17) 55. Rb3 $2 (55. Rxc4 $1 $11 {and White stays safe.} bxc4 56. Kd4) 55... Kc5 $2 (55... Ka5 $1 $19 56. Rd3 Ka4) 56. Kf3 Rd4 57. Kf2 Kb6 58. Rf3 $2 {[%mdl 8192]} (58. Ke3 $15 Rg4 59. Rb1) 58... f4 $19 59. Ke2 {[#]} Ka5 $1 60. Rb3 Re4+ $2 (60... Rd5 $19 {has better winning chances.} 61. Rh3 Ka4 ) (60... Ka4 61. Rf3 Rd6) 61. Kd2 $17 Ka4 62. Rf3 Rd4+ 63. Kc2 Ka5 64. Kc3 Re4 {White must now prevent ...Re3+.} (64... Rc4+ {feels hotter.} 65. Kd3 Ka4 66. Kd2 Rc6 67. Kd1 Rc5) 65. Kd2 Kb6 66. Rc3 Rc4 {Strongly threatening ...Rxc3.} 67. Rb3 Kc5 68. Ke2 Re4+ 69. Kd2 Kb6 (69... Re5 $17) 70. Rf3 (70. Rc3 $11) 70... Ka5 71. Rb3 $1 Re6 72. Rb4 {[#]} (72. Rd3 $17 {was necessary.}) 72... f3 $2 (72... Rd6+ $1 $19 73. Ke2 f3+ 74. Ke3 Rc6) 73. Rf4 $11 {The position is equal.} Re2+ 74. Kc3 $1 Rf2 (74... f2 {with more complications.} 75. Rf6 f1=R 76. Rxf1 Ka4 77. Rf8 Re3+) 75. Rf6 Rf1 (75... Rh2 {keeps more tension.} 76. Rxf3 Ka4 77. Kd4 Rh5 78. Rg3 Rh2) 76. Kb2 Rf2+ (76... f2 $5) 77. Kb3 Rf1 78. Kb2 Rf2+ (78... f2 $5) 79. Kb3 Rf1 80. Kb2 {And White is the lucky defender. Weighted Error Value: White=0.85/ Black=0.45} 1/2-1/2 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "19.6"] [White "Khademalsharieh, Sarasadat"] [Black "Salimova, Nurgyul"] [Result "1-0"] [ECO "D27"] [WhiteElo "2494"] [BlackElo "2397"] [Annotator "ChessBase"] [PlyCount "95"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] [TimeControl "600+5"] {[%evp 0,51,15,23,27,6,6,6,6,6,53,51,15,25,20,24,17,21,47,38,42,35,19,18,26,9, 22,27,38,38,38,41,31,20,83,38,253,246,272,234,234,243,243,370,381,329,325,232, 230,244,206,280,301,308]} 1. d4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 2. c4 { [%emt 0:00:00]} e6 {[%emt 0:00:00]} 3. Nf3 {[%emt 0:00:00]} d5 {[%emt 0:00:02]} 4. Nc3 {[%emt 0:00:02]} dxc4 {[%emt 0:00:02]} 5. e3 {[%emt 0:00:10]} a6 { [%emt 0:00:15]} 6. a4 {[%emt 0:00:15]} c5 {[%emt 0:00:06]} 7. Bxc4 {[%emt 0:00: 02]} Nc6 {[%emt 0:00:10]} 8. O-O {[%emt 0:00:03]} cxd4 {[%emt 0:00:03]} 9. exd4 {[%emt 0:00:02]} Be7 {[%emt 0:00:03]} 10. Bg5 {[%emt 0:00:16]} O-O {[%emt 0:00: 05]} 11. Re1 {[%emt 0:00:02]} Nb4 {[%emt 0:00:24]} 12. Qe2 {[%emt 0:00:08]} Bd7 {[%emt 0:00:20]} 13. Ne5 {[%emt 0:00:07]} Rc8 {[%emt 0:00:35]} 14. Rad1 { [%emt 0:00:23]} Be8 {[%emt 0:02:51]} 15. Bb3 {[%emt 0:03:34]} Qc7 {[%emt 0:00: 52]} 16. Qf3 {[%emt 0:00:38]} Nc6 {[%emt 0:01:33]} 17. Qh3 {[%emt 0:01:52]} Qb6 {[%emt 0:01:48]} 18. Bxe6 {[%emt 0:01:30]} fxe6 {[%emt 0:00:49]} 19. Qxe6+ { [%emt 0:00:03]} Kh8 {[%emt 0:00:11]} 20. Qxc8 {[%emt 0:00:22]} Qxb2 {[%emt 0: 00:27]} 21. Bxf6 {[%emt 0:00:34]} gxf6 {[%emt 0:00:25]} 22. Nxc6 {[%emt 0:00: 30]} Bxc6 {[%emt 0:00:02]} 23. Qh3 {[%emt 0:00:01]} Bb4 {[%emt 0:00:06]} 24. Re3 {[%emt 0:00:15]} Qc2 {[%emt 0:00:24]} 25. Rf1 {[%emt 0:00:09]} Bxc3 { [%emt 0:00:25]} 26. Rxc3 {[%emt 0:00:02]} Qe4 {[%emt 0:00:00]} 27. Rg3 { [%emt 0:00:20]} Rg8 {[%emt 0:00:08]} 28. Rxg8+ {[%emt 0:00:22]} Kxg8 {[%emt 0: 00:00]} 29. Qg3+ {[%emt 0:00:02]} Kf7 {[%emt 0:00:07]} 30. a5 {[%emt 0:00:05]} Qd5 {[%emt 0:00:09]} 31. h4 {[%emt 0:00:07]} Qxa5 {[%emt 0:00:02]} 32. Qg4 { [%emt 0:00:04]} Qd5 {[%emt 0:00:01]} 33. h5 {[%emt 0:00:03]} Qe4 {[%emt 0:00: 11]} 34. Qxe4 {[%emt 0:00:02]} Bxe4 {[%emt 0:00:00]} 35. f3 {[%emt 0:00:01]} Bc6 {[%emt 0:00:03]} 36. Ra1 {[%emt 0:00:05]} Ke6 {[%emt 0:00:01]} 37. Kf2 { [%emt 0:00:02]} Kf5 {[%emt 0:00:03]} 38. g4+ {[%emt 0:00:04]} Kf4 {[%emt 0:00: 08]} 39. Ra5 {[%emt 0:00:03]} Bd7 {[%emt 0:00:02]} 40. Rd5 {[%emt 0:00:06]} Be6 {[%emt 0:00:02]} 41. Rd6 {[%emt 0:00:03]} Bc8 {[%emt 0:00:01]} 42. Rxf6+ { [%emt 0:00:01]} Kg5 {[%emt 0:00:01]} 43. Rf8 {[%emt 0:00:01]} Be6 {[%emt 0:00: 01]} 44. Kg3 {[%emt 0:00:04]} Bc4 {[%emt 0:00:10]} 45. f4+ {[%emt 0:00:02]} Kh6 {[%emt 0:00:02]} 46. Rc8 {[%emt 0:00:03]} Be6 {[%emt 0:00:06]} 47. Rc7 { [%emt 0:00:03]} Bd5 {[%emt 0:00:07]} 48. Kh4 {[%emt 0:00:04]} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "19.7"] [White "Abdusattorov, Nodirbek"] [Black "Praggnanandhaa R"] [Result "1/2-1/2"] [ECO "B30"] [WhiteElo "2627"] [BlackElo "2608"] [Annotator "TA"] [PlyCount "161"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 11,161,6,7,-25,-24,-33,-15,-29,-32,-48,-39,-42,0,-23,6,-47,-47,-52,-45, -40,-35,-37,-35,-46,-43,-58,-57,-55,-55,-66,-55,-56,-56,-60,-41,-37,-26,-41, -14,-14,-13,-17,-16,-13,0,0,0,0,18,13,20,28,22,20,26,14,18,24,26,31,163,161, 250,130,141,150,132,0,155,66,66,66,114,121,125,18,33,0,0,0,0,0,0,0,47,0,0,0,0, 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. Nc3 Nc6 3. Bb5 Nd4 4. Bc4 e6 5. Nf3 Nf6 6. O-O a6 7. a4 {B30: Sicilian: 2...Nc6 3 Bb5, lines without ...g6.} d5 8. exd5 exd5 9. Re1+ Be7 10. Be2 O-O 11. d3 {[#]} h6 $146 ({ Predecessor:} 11... Qd6 12. Bg5 h6 13. Bh4 Nf5 14. Bg3 Nxg3 15. hxg3 Bf5 16. Nd2 Rfe8 17. Bf3 Bf8 {0-1 (46) Jefic,S (2105)-Mazur,S (2360) Kemer 2009}) 12. Bf4 Bd6 13. Bg3 ({White should play} 13. Bxd6 $11 Qxd6 14. Nxd4 cxd4 15. Na2) 13... Bxg3 $15 14. hxg3 Re8 15. Nxd4 cxd4 16. Nb1 Qb6 17. Ra2 Bd7 18. a5 Qb4 19. Qd2 Qc5 20. Na3 Re7 21. Raa1 Rae8 22. Bf3 Bg4 23. Rxe7 Qxe7 24. Kf1 Bxf3 25. gxf3 Nd7 26. Kg2 Nb8 27. c4 dxc3 28. Qxc3 Nc6 29. Nc2 Qd6 30. Nd4 Nxd4 31. Qxd4 $11 {[%mdl 4096] Endgame KQR-KQR} Qc6 32. Rh1 Re2 33. Rh5 Qc1 34. Rxd5 Qxb2 35. Qc5 Re8 (35... Kh7 $14) 36. Rd7 $18 Qb3 {[#]} (36... Qe5 $142 37. Qb4 Rb8) 37. Qc7 (37. d4 $1 $18) 37... Re1 $16 38. Rd8+ ({Don't play} 38. Qxb7 $6 Qxb7 39. Rxb7 Re5 $11) (38. Qc5 Re8 (38... Qe6 39. Qc8+ Kh7 40. Qxb7) 39. d4) 38... Kh7 {[#]} 39. Qc8 (39. Qd7 $1 $16 {[%CAl Rd7f5] White wants to mate with Qf5+.} Qe6 40. Qxb7) 39... Qe6 (39... Qb5 $1 $11) 40. Rh8+ ({White should try} 40. Qxb7 $16 Re5 41. Rd7) 40... Kg6 $14 41. Qxb7 Qe2 {( -> ...Qf1+)} 42. Qe4+ Qxe4 43. dxe4 $16 {KR-KR} (43. fxe4 $16 {aiming for Ra8.} Ra1 44. d4) 43... Ra1 $11 44. Rb8 {Black must now prevent Rb6+.} Rxa5 45. Rb6+ f6 46. f4 Kf7 47. Rb7+ Kg6 48. Ra7 h5 {The position is equal.} 49. Kh3 Kh6 50. f5 Ra4 51. f3 Ra2 52. Ra8 {White threatens Rh8+ and mate.} Kh7 53. Ra7 Kh6 54. Ra8 {Threatening mate with Rh8+.} (54. f4 {keeps more tension.} Ra1 55. Kg2 Ra2+ 56. Kf3 Ra3+ 57. Ke2 ) 54... Kh7 55. g4 hxg4+ 56. Kxg4 a5 57. f4 Ra4 58. Kf3 {Threatening e5.} Ra3+ 59. Kf2 {e5 is the strong threat.} Ra2+ 60. Ke3 {Threatens to win with e5.} Ra3+ 61. Kd4 {And now e5 would win.} (61. Ke2 {is interesting.} Ra2+ 62. Kf3 Ra3+) 61... Rf3 $1 62. Rxa5 (62. Kd5 {with more complications.} Rxf4 63. Ra7 Kh6 64. Rxa5 Rf1 65. Ra3) 62... Rxf4 63. Ke3 Rh4 64. Ra7 Rh3+ 65. Kf4 Rh4+ 66. Kf3 Rh3+ 67. Kg4 Re3 68. Kf4 Re1 69. Ra8 Re2 70. Kf3 Rb2 71. Ra1 (71. Ke3 { seems wilder.} Rb4 72. Rf8 Kh6 73. Rg8 Kh7 74. Rf8) 71... Rb3+ 72. Kf4 Rb4 73. Rh1+ Kg8 74. Rc1 Kh7 75. Rc7 Ra4 76. Rb7 Rc4 77. Ra7 Rb4 78. Rc7 Ra4 79. Rb7 Rc4 80. Ra7 Rb4 81. Rc7 {Weighted Error Value: White=0.17/Black=0.16} 1/2-1/2 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "19.8"] [White "Murzin, Volodar"] [Black "Yip, Carissa"] [Result "1-0"] [ECO "C95"] [WhiteElo "2478"] [BlackElo "2430"] [Annotator "ChessBase"] [PlyCount "99"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] [TimeControl "600+5"] {[%evp 0,75,15,21,17,22,8,17,26,6,0,9,18,-5,10,0,16,-9,-20,-11,8,-14,2,0,-1,-8, 0,12,6,4,14,22,22,19,70,49,66,67,106,87,53,40,33,32,32,32,35,28,23,31,42,35,32, 32,38,39,46,13,27,30,48,23,20,30,27,33,34,28,46,33,26,27,34,-21,-4,27,15,18]} 1. e4 {[%emt 0:00:00]} e5 {[%emt 0:00:00]} 2. Nf3 {[%emt 0:00:00]} Nc6 { [%emt 0:00:00]} 3. Bb5 {[%emt 0:00:00]} a6 {[%emt 0:00:00]} 4. Ba4 {[%emt 0:00: 01]} Nf6 {[%emt 0:00:00]} 5. O-O {[%emt 0:00:03]} Be7 {[%emt 0:00:01]} 6. Re1 { [%emt 0:00:01]} b5 {[%emt 0:00:03]} 7. Bb3 {[%emt 0:00:02]} d6 {[%emt 0:00:02]} 8. c3 {[%emt 0:00:05]} O-O {[%emt 0:00:02]} 9. h3 {[%emt 0:00:02]} Nb8 { [%emt 0:00:02]} 10. d4 {[%emt 0:00:03]} Nbd7 {[%emt 0:00:01]} 11. c4 {[%emt 0: 00:08]} c6 {[%emt 0:00:06]} 12. Nc3 {[%emt 0:00:03]} b4 {[%emt 0:00:08]} 13. Na4 {[%emt 0:00:04]} c5 {[%emt 0:01:07]} 14. d5 {[%emt 0:00:04]} Ne8 {[%emt 0: 00:07]} 15. Bc2 {[%emt 0:00:03]} a5 {[%emt 0:00:05]} 16. b3 {[%emt 0:00:02]} g6 {[%emt 0:00:08]} 17. a3 {[%emt 0:00:23]} Ng7 {[%emt 0:00:08]} 18. Nb2 {[%emt 0: 00:04]} Nb6 {[%emt 0:00:14]} 19. Bd2 {[%emt 0:00:08]} f5 {[%emt 0:00:03]} 20. Qe2 {[%emt 0:00:06]} f4 {[%emt 0:00:08]} 21. axb4 {[%emt 0:00:07]} axb4 { [%emt 0:00:03]} 22. Rxa8 {[%emt 0:00:05]} Nxa8 {[%emt 0:00:01]} 23. Ra1 { [%emt 0:00:00]} Nb6 {[%emt 0:00:14]} 24. Nd3 {[%emt 0:00:11]} g5 {[%emt 0:00: 28]} 25. Ra7 {[%emt 0:02:47]} Bf6 {[%emt 0:00:15]} 26. Nh2 {[%emt 0:00:15]} h5 {[%emt 0:00:08]} 27. Bd1 {[%emt 0:00:13]} Bd7 {[%emt 0:00:24]} 28. Qe1 { [%emt 0:00:25]} Qb8 {[%emt 0:00:21]} 29. Ra2 {[%emt 0:00:13]} Rd8 {[%emt 0:00: 35]} 30. Be2 {[%emt 0:00:08]} Be8 {[%emt 0:00:28]} 31. Qa1 {[%emt 0:00:32]} Bg6 {[%emt 0:00:01]} 32. f3 {[%emt 0:00:27]} Rd7 {[%emt 0:00:02]} 33. Ra6 {[%emt 0: 00:34]} Bd8 {[%emt 0:00:01]} 34. Be1 {[%emt 0:00:12]} Ne8 {[%emt 0:00:09]} 35. Bf2 {[%emt 0:00:02]} Nf6 {[%emt 0:00:58]} 36. Nxe5 {[%emt 0:02:07]} dxe5 { [%emt 0:00:05]} 37. Bxc5 {[%emt 0:00:02]} g4 {[%emt 0:01:33]} 38. Kh1 {[%emt 0: 00:22]} Qb7 {[%emt 0:00:40]} 39. Bg1 {[%emt 0:00:42]} Bxe4 {[%emt 0:01:24]} 40. fxe4 {[%emt 0:00:04]} Nxe4 {[%emt 0:00:01]} 41. Nxg4 {[%emt 0:01:20]} Ng3+ { [%emt 0:00:17]} 42. Kh2 {[%emt 0:00:02]} Nxe2 {[%emt 0:00:21]} 43. Nxe5 { [%emt 0:00:14]} Rg7 {[%emt 0:00:11]} 44. Bxb6 {[%emt 0:00:24]} f3 {[%emt 0:00: 33]} 45. gxf3 {[%emt 0:00:26]} Nf4 {[%emt 0:01:25]} 46. Bxd8 {[%emt 0:00:16]} Qc8 {[%emt 0:00:16]} 47. Ng4 {[%emt 0:00:03]} hxg4 {[%emt 0:00:02]} 48. fxg4 { [%emt 0:00:09]} Qc5 {[%emt 0:00:25]} 49. Bb6 {[%emt 0:00:07]} Qd6 {[%emt 0:00: 19]} 50. Bd4 {[%emt 0:00:07]} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "19.9"] [White "Mammadzada, Gunay"] [Black "Lei, Tingjie"] [Result "0-1"] [ECO "C67"] [WhiteElo "2443"] [BlackElo "2505"] [Annotator "RC"] [PlyCount "130"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] [TimeControl "600+5"] {[%evp 0,69,21,22,22,22,26,26,14,11,42,27,12,4,9,-9,-4,2,5,5,5,-1,-1,8,20,-6, 30,7,13,19,10,13,0,-11,-9,-9,-11,-1,7,-17,-15,-23,11,14,27,30,51,43,77,39,47, 23,21,27,19,-2,27,16,17,12,11,-29,10,-2,10,4,16,3,7,4,13,10]} 1. e4 {[%emt 0: 00:00]} e5 {[%emt 0:00:00]} 2. Nf3 {[%emt 0:00:00]} Nc6 {[%emt 0:00:00]} 3. Bb5 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 4. O-O {[%emt 0:00:01]} Nxe4 {[%emt 0:00: 01]} 5. Re1 {[%emt 0:00:01]} Nd6 {[%emt 0:00:01]} 6. Nxe5 {[%emt 0:00:02]} Be7 {[%emt 0:00:02]} 7. Bf1 {[%emt 0:00:02]} Nxe5 {[%emt 0:00:01]} 8. Rxe5 { [%emt 0:00:02]} O-O {[%emt 0:00:02]} 9. d4 {[%emt 0:00:01]} Bf6 {[%emt 0:00:01] } 10. Re1 {[%emt 0:00:01]} Re8 {[%emt 0:00:04]} 11. c3 {[%emt 0:00:02]} Rxe1 { [%emt 0:00:10]} 12. Qxe1 {[%emt 0:00:02]} Ne8 {[%emt 0:01:00]} 13. d5 {[%emt 0: 00:03]} d6 {[%emt 0:00:03]} 14. Nd2 {[%emt 0:00:02]} c6 {[%emt 0:00:04]} 15. Ne4 {[%emt 0:01:05]} Be7 {[%emt 0:00:58]} 16. Bf4 {[%emt 0:00:41]} cxd5 { [%emt 0:00:13]} 17. Ng3 {[%emt 0:00:05]} Be6 {[%emt 0:00:12]} 18. Bd3 {[%emt 0: 00:09]} Bg5 {[%emt 0:00:15]} 19. Qe3 {[%emt 0:00:16]} Bxf4 {[%emt 0:00:03]} 20. Qxf4 {[%emt 0:00:01]} Qf6 {[%emt 0:00:09]} 21. Qb4 {[%emt 0:00:06]} Qe7 { [%emt 0:00:19]} 22. Re1 {[%emt 0:00:06]} Qd7 {[%emt 0:00:54]} 23. Ne2 {[%emt 0: 00:18]} a5 {[%emt 0:00:26]} 24. Qb6 {[%emt 0:00:10]} Qc7 {[%emt 0:00:22]} 25. Qe3 {[%emt 0:00:07]} Nf6 {[%emt 0:00:14]} 26. Nd4 {[%emt 0:00:24]} Re8 { [%emt 0:00:12]} 27. Qg3 {[%emt 0:01:31]} Bd7 {[%emt 0:02:15]} 28. Rxe8+ { [%emt 0:01:40]} Nxe8 {[%emt 0:00:02]} 29. Qe3 {[%emt 0:00:01]} Qd8 {[%emt 0:00: 04]} 30. f3 {[%emt 0:01:15]} Nf6 {[%emt 0:00:19]} 31. Be2 {[%emt 0:00:33]} Kf8 {[%emt 0:00:28]} 32. g4 {[%emt 0:00:06]} h6 {[%emt 0:00:36]} 33. Kf2 {[%emt 0: 00:04]} Qe7 {[%emt 0:01:18]} 34. Qxe7+ {[%emt 0:00:35]} Kxe7 {[%emt 0:00:02]} 35. Ke3 {[%emt 0:00:02]} g5 {[%emt 0:00:16]} 36. h3 {[%emt 0:01:51]} h5 { [%emt 0:00:02]} 37. Bd3 {[%emt 0:00:07]} hxg4 {[%emt 0:00:10]} 38. hxg4 { [%emt 0:00:06]} Be6 {[%emt 0:00:04]} 39. b3 {[%emt 0:00:43]} Nd7 {[%emt 0:00: 02]} 40. Nc2 {[%emt 0:00:11]} Ne5 {[%emt 0:00:04]} 41. Be2 {[%emt 0:00:01]} Ng6 {[%emt 0:00:10]} 42. Bd3 {[%emt 0:00:28]} Nf4 {[%emt 0:00:05]} 43. Bh7 { [%emt 0:00:02]} Kf6 {[%emt 0:00:04]} 44. Nd4 {[%emt 0:00:05]} Ke5 {[%emt 0:00: 04]} 45. Bc2 {[%emt 0:00:14]} Bd7 {[%emt 0:00:14]} 46. Bb1 {[%emt 0:00:15]} Ng2+ {[%emt 0:00:07]} 47. Kf2 {[%emt 0:00:02]} Nh4 {[%emt 0:00:09]} 48. Kg3 { [%emt 0:00:02]} f5 {[%emt 0:00:14]} 49. f4+ {[%emt 0:00:11]} Kf6 {[%emt 0:00: 01]} 50. fxg5+ {[%emt 0:00:10]} Kxg5 {[%emt 0:00:01]} 51. gxf5 {[%emt 0:00:05]} Bxf5 {[%emt 0:00:07]} 52. Nxf5 {[%emt 0:00:02]} Nxf5+ {[%emt 0:00:01]} 53. Kf3 {[%emt 0:00:00]} d4 {[%emt 0:00:19]} 54. cxd4 {[%emt 0:00:14]} Nxd4+ {[%emt 0: 00:01]} 55. Ke4 {[%emt 0:00:00]} Nb5 {[%emt 0:00:03]} 56. Kd3 {[%emt 0:00:05]} Kf4 {[%emt 0:00:02]} 57. a4 {[%emt 0:00:03]} Nc7 {[%emt 0:00:11]} 58. Kd4 { [%emt 0:00:04]} b6 {[%emt 0:00:02]} 59. Bc2 {[%emt 0:00:06]} Kf3 {[%emt 0:00: 02]} 60. Bd3 {[%emt 0:00:07]} Kf2 {[%emt 0:00:02]} 61. Kc4 {[%emt 0:00:07]} Ke3 {[%emt 0:00:01]} 62. Bf1 {[%emt 0:00:07]} d5+ {[%emt 0:00:03]} 63. Kc3 { [%emt 0:00:01]} Ne6 {[%emt 0:00:03]} 64. b4 {[%emt 0:00:02]} Nd4 {[%emt 0:00: 49]} 65. Ba6 {[%emt 0:00:20]} Nf5 {[%emt 0:00:23]} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.11"] [Round "19.10"] [White "Nihal Sarin"] [Black "Badelka, Olga"] [Result "1-0"] [ECO "D02"] [WhiteElo "2620"] [BlackElo "2433"] [Annotator "TA"] [PlyCount "79"] [EventDate "2021.04.08"] [EventType "tourn"] [EventCountry "NET"] [Tiebreak "Koya+Number of black wins+Number of wins"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 17,79,0,0,-10,6,-5,-6,-20,-16,-29,0,0,6,-30,0,0,72,-25,-17,-12,-11,0,0, -17,171,165,151,153,283,284,327,328,322,324,306,298,288,311,396,407,433,411, 479,383,593,450,437,437,607,489,688,674,856,850,850,825,1029,1002,2743,2609, 5547,5557,6495,5929]} 1. d4 Nf6 2. Bf4 e6 3. e3 d5 4. Nd2 Bd6 5. Bg3 O-O 6. Ngf3 c5 7. c3 b6 8. Ne5 Bb7 9. Bd3 Nc6 10. O-O {D02:1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4.} Ne7 11. Bh4 Ne4 12. Bxe4 {The position is equal.} dxe4 13. Nec4 {[#]} Bc7 $146 ({Predecessor:} 13... cxd4 14. exd4 b5 15. Nxd6 Qxd6 16. Re1 Nf5 17. Nxe4 Qc6 18. Bg5 Nd6 19. f3 Nxe4 20. Rxe4 {1/2-1/2 (38) Ju,W (2579)-Kosteniuk,A (2555) Doha 2016}) 14. dxc5 bxc5 15. Qc2 Re8 16. Rfd1 ({But not} 16. Nxe4 $2 Qd5 $19) 16... Qd5 (16... Qb8 $11 {keeps the balance.}) 17. b3 (17. Bg3 $16 Rac8 18. Qa4) 17... Qh5 18. Bg3 Bxg3 19. hxg3 Rad8 20. Nf1 {Hoping for Nd6.} Nf5 {[#] This costs Black the game.} (20... Bd5 $11 {and Black is okay.}) 21. Nh2 $1 $18 Rxd1+ 22. Rxd1 {Black must now prevent g4.} Qg5 {[#]} (22... Nh6 $16 {was called for.}) 23. g4 $1 {[%CAl Rg4f5]} Nh6 24. Nd6 $1 {[%csl Bb7,Be4,Be8][%mdl 64] Double Attack} Rb8 25. Nxb7 ({Less strong is} 25. Nxe4 Qe7 $16) 25... Rxb7 26. Qxe4 Rb8 27. Rd7 Kh8 28. Rxa7 f5 29. gxf5 exf5 30. Qf4 Qd8 (30... Qxf4 {is a better defense.} 31. exf4 g6) 31. Nf1 {White is clearly winning.} Rc8 32. Qe5 {[%csl Ga7][%CAl Re5g7]} Qg5 33. Re7 Rf8 (33... Ng8 $142) 34. Re8 Rxe8 35. Qxe8+ Ng8 36. a4 {[%CAl Ba2a4,Ba4a5,Ba5a6][%mdl 32]} h5 37. a5 h4 38. a6 h3 39. Ng3 f4 40. Qh5+ { Weighted Error Value: White=0.23/Black=0.69} 1-0