[Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "1.1"] [White "Badelka, Olga"] [Black "Zhu, Jiner"] [Result "0-1"] [ECO "A18"] [WhiteElo "2433"] [BlackElo "2459"] [Annotator "TA"] [PlyCount "122"] [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 20,122,27,0,0,0,0,0,0,0,7,0,10,0,0,0,0,0,8,0,14,-20,-5,-9,-5,-110,-43, -43,-48,-86,-78,-76,-75,-85,-76,-86,-86,-89,-89,-91,-70,-63,-70,-72,-75,-73, -10,-66,-59,-72,-64,-72,-63,-91,-51,-63,-63,-93,-89,-100,-96,-98,-102,-129,-59, -94,-87,-82,-71,-75,-56,-226,-216,-229,-238,-454,-445,-558,-558,-558,-556,-558, -558,-556,-556,-549,-556,-549,-545,-516,-516,-454,-285,-1143,-1143,-1129,-1112, -898,-872,-843,-601,-1835,-1825,-29979,-5683]} 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. bxc3 Qxf6 7. d4 e5 8. Nf3 exd4 9. Bg5 Qe6+ 10. Be2 Be7 11. cxd4 (11. Nxd4 {is interesting.} Qe5 12. Bxe7 Qxe7 13. O-O O-O 14. Re1) 11... Bxg5 {A18: English Opening: Flohr-Mikenas System (1 c4 Nf6 2 Nc3 e6 3 e4) .} 12. Nxg5 Qg6 13. f4 (13. Nf3 {keeps more tension.} O-O 14. O-O Bh3 15. Ne1 Bf5 16. Nf3) 13... O-O {The position is equal.} 14. O-O Nc6 15. d5 Ne7 16. Qd2 h6 17. Nf3 Qd6 {[#]} 18. Ne5 $146 ({Predecessor:} 18. Rad1 c6 19. dxc6 Qxc6 20. Rfe1 Qc7 21. Qd6 Qxd6 22. Rxd6 Be6 23. Nd4 Nf5 24. Nxf5 Bxf5 {1/2-1/2 (46) Vachier Lagrave,M (2710)-Ganguly,S (2625) Melilla 2011}) 18... c6 {[%CAl Rc6d5] } 19. Rad1 Rd8 20. Kh1 cxd5 21. cxd5 {[#]} Be6 $1 {[%CAl Re6d5]} 22. f5 (22. Bc4 Bxd5) 22... Qxe5 (22... Bxd5 $17 23. Qb2 Qb6) 23. fxe6 $15 fxe6 {[%CAl Rd8d5]} 24. d6 Nd5 25. Bg4 {Rfe1 is the strong threat.} Qxd6 26. Rfe1 {[#]} Re8 27. Qe2 {[%CAl Rg4e6]} Rad8 28. Bxe6+ {[%mdl 64] Double Attack} Kh8 29. Qg4 Qb4 30. Qxb4 Nxb4 31. Rxd8 Rxd8 {[%mdl 4096] Endgame KRB-KRN} 32. Bb3 g5 (32... Nd3 $17 33. Re7 Nc5) 33. h3 ({White should play} 33. h4 $1 $11) 33... Rd7 34. Re4 Nc6 35. Re8+ Kg7 36. Kh2 Re7 37. Rc8 Nd4 38. Bd5 b6 39. Rc4 Nf5 {Strongly threatening ...Ne3.} 40. Rc8 h5 41. Rg8+ Kh6 (41... Kf6 $17 42. Bb3 Rc7 43. Rf8+ Ke5) 42. g4 hxg4 43. hxg4 Ne3 44. Bf3 Re5 45. Rf8 $2 {This costs White the game.} (45. Kg3 $15) 45... Ra5 $19 46. Kg3 Rxa2 {( -> ...Nf1+)} 47. Be4 $2 (47. Bb7 {is a better defense.}) 47... Kg7 48. Rd8 Nf1+ 49. Kf3 Nd2+ 50. Ke3 Nxe4 51. Kxe4 {KR-KR} Ra5 52. Rd7+ Kf6 53. Rb7 Ke6 54. Rg7 Kd6 55. Rg6+ Kc7 56. Rf6 $2 (56. Rg7+ Kb8 57. Rg6) 56... Rc5 57. Rf7+ Kb8 58. Rf8+ Kb7 59. Rf7+ Ka6 60. Rf5 Kb5 61. Re5 a5 {Weighted Error Value: White=0.30/Black=0.09} (61... Rxe5+ $142 62. Kxe5 a5 63. Ke4 Kc4 64. Kf5 a4 65. Kf6 a3 66. Kxg5 a2 67. Kg6 a1=Q 68. Kf5 Kd5 69. Kf4 Qe5+ 70. Kf3 Kd4 71. Kf2 Qf4+ 72. Kg2 Qxg4+ 73. Kf2 Kd3 74. Kf1 Ke3 75. Ke1 Qg1#) 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "1.2"] [White "Lei, Tingjie"] [Black "Nihal Sarin"] [Result "1/2-1/2"] [ECO "C79"] [WhiteElo "2505"] [BlackElo "2620"] [Annotator "TA"] [PlyCount "51"] [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 17,51,42,62,51,54,12,16,12,23,24,18,8,10,11,21,4,29,-14,-14,-14,-12,-16, 6,5,7,3,4,3,8,0,7,0,6,0,3,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O d6 6. Re1 b5 7. Bb3 Na5 8. d4 Nxb3 9. axb3 Bb7 10. dxe5 {C79: Ruy Lopez: Steinitz-type lines with 3...a6 4 Ba4 Nf6 5 0-0 d6.} Nxe4 11. exd6 {[#]} (11. Nbd2 $5 {[%CAl Rd2e4]} d5 12. c3 $14) 11... Qxd6 $146 ({Predecessor:} 11... Bxd6 12. Qd3 f5 13. Bg5 Qd7 14. Nc3 O-O 15. Rad1 Qf7 16. Nd5 Rfe8 17. c4 h6 { 0-1 (37) Baglan,E (2257)-Abramovic,B (2431) Paracin 2015}) 12. Qxd6 Bxd6 13. Ng5 O-O $1 14. Nxe4 Rae8 $1 15. Nbc3 {Bg5 is the strong threat.} f5 16. f3 Bb4 {[#]} 17. Bd2 $1 {And now Nf2 would win.} fxe4 {The position is equal.} 18. fxe4 Re6 19. Rad1 Bxc3 20. Bxc3 Rxe4 21. Rxe4 Bxe4 $11 {KRB-KRB} 22. Rd7 Rf7 23. Rd8+ Rf8 24. Rd7 Rf7 25. Rd8+ Rf8 26. Rd7 {Weighted Error Value: White=0. 11/Black=0.05} 1/2-1/2 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "1.3"] [White "Yip, Carissa"] [Black "Mammadzada, Gunay"] [Result "1/2-1/2"] [ECO "B90"] [WhiteElo "2430"] [BlackElo "2443"] [Annotator "TA"] [PlyCount "87"] [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 15,87,27,18,16,57,67,77,74,194,199,218,191,197,116,110,76,154,112,122, 54,195,33,21,23,14,0,2,7,9,-38,-43,-104,-18,-59,-58,-57,-62,-54,-50,-46,-43, -75,-72,-83,-77,-90,-65,-97,-73,-72,-63,-93,-61,-65,-45,-45,-33,-73,-74,-92, -50,-93,-69,-73,-34,-45,0,0,0,-64,0,-102,0,-58]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nf3 Qc7 8. a4 Be6 9. Ng5 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.} Qc6 10. Nxe6 fxe6 { [#]} 11. g4 $146 {White is better.} ({Predecessor:} 11. g3 Nxe4 12. Bg2 d5 13. Nxe4 dxe4 14. Qh5+ g6 15. Qxe5 Rg8 16. Bxe4 Qc8 17. Bxb7 Qxb7 18. Qxe6+ Qe7 19. Qxg8 Nd7 20. Qd5 Rb8 21. O-O Qe5 22. Qxe5+ Nxe5 23. Bf4 {1-0 (23) Dogan,N (2129)-Bitirgen,B (1820) Kemer 2014}) 11... Be7 $2 (11... h6 $16 {might work better.}) (11... Nbd7) 12. g5 $1 $18 {[%CAl Rg5f6]} Nfd7 13. Qh5+ $1 g6 14. Qg4 ({White should play} 14. Qh6 $18) 14... Nf8 $16 15. h4 Nbd7 (15... Bd8 $142) 16. h5 Rg8 17. O-O-O (17. h6 $16) 17... O-O-O {[#]} ({Black should try} 17... gxh5 $14 18. Qxh5+ Rg6) 18. Kb1 $2 (18. Qf3 $1 $18 {[%CAl Rf3f7]} gxh5 19. Qf7 (19. Qxh5 Rg7 $11)) 18... gxh5 $14 19. Qxh5 {Black must now prevent Qf7.} Rg7 20. Bh3 Kb8 21. Rhg1 Nc5 22. Bxc5 Qxc5 23. Qe2 (23. Qf3 $15) 23... Rxg5 ({ Better is} 23... Bxg5 $17 24. Rg3 Qb4) 24. Rxg5 Bxg5 25. Qh5 h6 26. Qf7 Qc8 27. Rd3 Qd7 28. Qg8 Qe7 {Hoping for ...Nd7.} 29. Rf3 {[#]} Bf4 $1 30. Rd3 Nd7 31. Qg6 ({Avoid the trap} 31. Qxe6 $2 Qxe6 32. Bxe6 Nc5 $19) 31... Nc5 32. Rd1 Rc8 33. Qg4 Re8 34. Qe2 Rd8 35. Qc4 Rc8 36. Qe2 Qh4 37. Bg2 Rg8 38. Rh1 Qe7 39. Bh3 Qe8 40. Rd1 Qe7 41. Qc4 Rc8 (41... Rg6 $11) 42. Qe2 $15 Qh4 43. Bg2 Qe7 44. Bh3 $1 {Blacks defense is rewarded with a draw. Weighted Error Value: White=0.21/ Black=0.28} 1/2-1/2 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "1.4"] [White "Praggnanandhaa R"] [Black "Murzin, Volodar"] [Result "0-1"] [ECO "E92"] [WhiteElo "2608"] [BlackElo "2478"] [Annotator "TA"] [PlyCount "82"] [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 20,82,35,25,44,27,56,41,26,0,22,22,17,-32,-22,-35,-73,-143,-137,-129, -130,-110,-129,-179,-187,-180,-189,-222,-223,-279,-252,-317,-344,-387,-353, -399,-374,-395,-399,-575,-450,-858,-850,-812,-808,-29981,-29982,-29978,-1245, -4214,-2716,-29970,-29971,-29972,-29972,-29972,-29974,-29974,-29975,-29988, -29989,-29995,-29996,-29997,-29998]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. h3 d6 6. Be3 e5 7. d5 Na6 8. Nf3 Nc5 9. Nd2 a5 10. g4 c6 11. Be2 a4 {E92: King's Indian: Classical: 6 Be2 e5:7 dxe5, 7 Be3 and Petrosian System without 7...Nbd7.} 12. g5 Ne8 13. h4 f6 {[#] White is slightly better.} 14. Rg1 $146 ({ Predecessor:} 14. b4 axb3 15. axb3 Rxa1 16. Qxa1 Na6 17. Qa3 c5 18. Na2 f5 19. f3 Qb6 20. Bd3 {1-0 (47) Lyrberg,P (2446)-Murzin,V (2336) Stockholm 2018}) 14... Qa5 15. Rb1 Bd7 16. h5 fxg5 17. hxg6 h6 18. Bg4 $2 (18. Qc2 $142) (18. Kf1) 18... Bxg4 $1 $17 19. Qxg4 Nf6 20. Qg2 Nd3+ 21. Ke2 Nf4+ 22. Bxf4 exf4 23. Qh3 Rae8 24. Kd1 Qc5 25. Rf1 b5 {[%CAl Bb7b5,Bb5b4][%mdl 32]} 26. Qd3 b4 27. Nxa4 Qa7 28. b3 cxd5 29. cxd5 (29. exd5 $142 Ng4 30. c5) 29... Ng4 30. Ke1 (30. f3 $142 Nf2+ 31. Rxf2 Qxf2 32. Qe2) 30... Ne5 $19 31. Qe2 Rc8 32. Nf3 Nxf3+ 33. Qxf3 Rc2 (33... Bc3+ $142 34. Nxc3 Rxc3 35. Qg4 Qxa2 {[%mdl 64] Double Attack} 36. Qd1 f3 37. Rh1 Rf4 38. Ra1 Rxe4+ 39. Kf1 {[#]} Rd3 $3 {[%mdl 512]} 40. Qe1 Rxe1+ 41. Rxe1 Rd1 $3 {[%mdl 576] Deflection, Decoy} 42. Rxd1 Qe2+ {[%mdl 64] Double Attack} 43. Kg1 Qxd1+ {[%mdl 64] Double Attack} 44. Kh2 Qd2 45. Rf1 Qf4+ 46. Kh1 Qg4 47. Kh2 Qg2#) 34. Qd3 Rfc8 35. Kd1 Rxf2 {Black mates.} 36. Re1 Be5 37. Rc1 Rxc1+ 38. Kxc1 Rxa2 39. Qb5 Ra1+ 40. Kd2 Qd4+ 41. Kc2 Ra2+ {Black took control after the opening. Weighted Error Value: White=0.86/Black=0.27} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "1.5"] [White "Salimova, Nurgyul"] [Black "Abdusattorov, Nodirbek"] [Result "0-1"] [ECO "E17"] [WhiteElo "2397"] [BlackElo "2627"] [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 13,66,10,18,10,25,3,9,0,14,5,9,18,22,25,28,29,33,30,25,0,0,0,0,0,0,0,0, 0,8,-35,-46,-49,-52,-82,-55,-102,-99,-106,-100,-230,-229,-334,-322,-290,-238, -364,-346,-335,-333,-308,-200,-943,-939,-930,-916]} 1. d4 Nf6 2. Nf3 e6 3. g3 b6 4. Bg2 Bb7 5. O-O Be7 6. c4 O-O 7. Re1 Na6 8. Bf4 {E17: Queen's Indian: 4 g3 Bb7 5 Bg2 Be7.} d5 9. Ne5 c5 10. Nc3 {[#] The position is equal.} cxd4 $146 ({Predecessor:} 10... Re8 11. Rc1 Ne4 12. cxd5 exd5 13. Bxe4 dxe4 14. Qb3 Rf8 15. d5 Bf6 {1-0 (67) Yakubboev,N (2575)-Khoroshev,N (2414) Tashkent 2019}) 11. Qxd4 Bc5 12. Qd1 Qe7 13. cxd5 exd5 14. Nd3 d4 {And now ...Bxg2 would win.} 15. Bxb7 Qxb7 16. Nb1 Nb4 17. Nd2 Nfd5 18. Nxc5 bxc5 19. Bd6 {[%mdl 64] Double Attack} Rfc8 20. a3 Na6 $40 {[%mdl 128] Black attacks.} 21. Nc4 (21. e4 $5 { [%CAl Re4d5]} Qc6 22. Bxc5 $1 (22. exd5 Qxd6 23. Qh5 Nc7 $11) 22... Nxc5 23. exd5 Qxd5 24. Qf3 $11) 21... Nb6 22. Nxb6 axb6 23. Bf4 {[#]} Qd5 $1 24. b3 {[#] } b5 $1 25. e4 Qd7 26. a4 {This costs White the game.} (26. Rc1 $17 {might work better.}) 26... Nb4 $19 27. e5 (27. Qd2 $142) 27... bxa4 28. bxa4 d3 29. Re4 (29. e6 $142 fxe6 30. Re4) 29... Qd5 30. Qf3 Nc2 31. Rd1 Rxa4 32. Qxd3 (32. Qg4 Raa8 33. Bh6) 32... Qxd3 33. Rxd3 Rxe4 {Weighted Error Value: White=0.42/ Black=0.08} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "1.6"] [White "Saduakassova, Dinara"] [Black "Khademalsharieh, Sarasadat"] [Result "0-1"] [ECO "D37"] [WhiteElo "2500"] [BlackElo "2494"] [Annotator "ChessBase"] [PlyCount "62"] [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"] 1. d4 {[%emt 0:00:00]} d5 {[%emt 0:00:00]} 2. c4 {[%emt 0:00:00]} e6 {[%emt 0: 00:00]} 3. Nf3 {[%emt 0:00:08]} a6 {[%emt 0:00:01]} 4. cxd5 {[%emt 0:00:05]} exd5 {[%emt 0:00:03]} 5. Nc3 {[%emt 0:00:07]} Nf6 {[%emt 0:00:03]} 6. Bg5 { [%emt 0:00:15]} Be6 {[%emt 0:00:22]} 7. Qb3 {[%emt 0:01:38]} Ra7 {[%emt 0:00: 26]} 8. e3 {[%emt 0:00:50]} Nbd7 {[%emt 0:00:42]} 9. Bd3 {[%emt 0:00:54]} c5 { [%emt 0:00:25]} 10. dxc5 {[%emt 0:00:17]} d4 {[%emt 0:00:21]} 11. Bxf6 { [%emt 0:01:16]} gxf6 {[%emt 0:00:56]} 12. Qc2 {[%emt 0:00:07]} dxc3 {[%emt 0: 00:03]} 13. Qxc3 {[%emt 0:00:06]} Nxc5 {[%emt 0:00:07]} 14. Bc2 {[%emt 0:00:11] } Ra8 {[%emt 0:00:24]} 15. Rd1 {[%emt 0:00:09]} Nd7 {[%emt 0:00:12]} 16. Nd4 { [%emt 0:00:40]} Rc8 {[%emt 0:00:15]} 17. Qd2 {[%emt 0:00:09]} Ne5 {[%emt 0:00: 28]} 18. O-O {[%emt 0:00:23]} Bc5 {[%emt 0:00:34]} 19. b4 {[%emt 0:00:40]} Bxd4 {[%emt 0:00:15]} 20. exd4 {[%emt 0:00:02]} Ng6 {[%emt 0:00:40]} 21. d5 { [%emt 0:00:17]} Bd7 {[%emt 0:00:23]} 22. Rfe1+ {[%emt 0:00:02]} Kf8 {[%emt 0: 00:01]} 23. Qh6+ {[%emt 0:00:06]} Kg8 {[%emt 0:00:01]} 24. Bb3 {[%emt 0:00:02]} Qf8 {[%emt 0:00:06]} 25. Qe3 {[%emt 0:00:08]} Qd6 {[%emt 0:00:12]} 26. Qh6 { [%emt 0:00:19]} Qf8 {[%emt 0:00:34]} 27. Qe3 {[%emt 0:00:14]} Qxb4 {[%emt 0:00: 05]} 28. d6 {[%emt 0:00:04]} Kg7 {[%emt 0:00:10]} 29. Rd4 {[%emt 0:01:31]} Qc5 {[%emt 0:00:40]} 30. Red1 {[%emt 0:00:08]} Rhe8 {[%emt 0:00:04]} 31. Qd2 { [%emt 0:00:14]} Qc3 {[%emt 0:00:03]} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "1.7"] [White "Liang, Awonder"] [Black "Abdumalik, Zhansaya"] [Result "0-1"] [ECO "C85"] [WhiteElo "2592"] [BlackElo "2472"] [Annotator "TA"] [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"] {[%evp 14,92,18,8,23,24,23,12,21,3,3,-12,-12,-19,0,-8,0,-29,-31,-62,-49,-58,0, -4,0,-26,-20,-152,-128,-238,-235,-244,-223,-239,-230,-240,-227,-311,-301,-312, -213,-244,-236,-224,-255,-231,-257,-254,-241,-286,-284,-233,-166,-420,-393, -862,-825,-885,-891,-2420,-5206,-5247,-2368,-2295,-2122,-1837,-1508,-1750, -1753,-1650,-1666,-29971,-29972,-29971,-29970,-29964,-29951,-6127,-6548,-5143, -4694]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Bxc6 dxc6 7. d3 Bd6 8. Nbd2 O-O {C85: Closed Ruy Lopez: Deferred Exchange Variation.} 9. Nc4 Nd7 10. Be3 Re8 {[#] The position is equal.} 11. Nfd2 $146 ({Predecessor:} 11. a4 c5 12. Nfd2 Nf8 13. a5 Be6 14. Nxd6 cxd6 15. Nc4 Qc7 16. Nb6 Rad8 17. c4 { 1-0 (49) Paravyan,D (2540)-Mikaelyan,A (2432) Yerevan 2017}) 11... Nf8 12. Kh1 Ng6 13. Qh5 Nf4 14. Bxf4 exf4 15. Rae1 Bf8 16. e5 b5 17. Na5 Qd4 ({Black should try} 17... Be6 $15) 18. Nf3 $11 (18. Nxc6 Qxb2 19. Nf3 h6 $17) 18... Qd5 19. Re4 ({Reject} 19. c4 Qxd3 20. Rd1 Qg6 $17) 19... Qxa2 ({Don't do} 19... g6 20. Qh4 $17) 20. Nxc6 {Black keeps a firm grip on the game.} (20. Rxf4 $11 g6 21. Qh4) 20... Bb7 21. Ng5 h6 $19 22. e6 {[#]} g6 $1 ({Inferior is} 22... hxg5 23. Qxf7+ Kh7 24. Qh5+ Kg8 25. Qf7+ Kh7 26. Qh5+ Kg8 27. Qf7+ $11) 23. exf7+ { [#]} Qxf7 $1 {[%mdl 512]} 24. Nxf7 gxh5 25. Nfe5 Bg7 26. Ree1 a5 {[%CAl Ba6a5, Ba5a4][%mdl 32]} 27. d4 Ra6 28. d5 a4 29. c3 Bxe5 30. Nxe5 Bxd5 31. Nd3 Rxe1 32. Rxe1 {[%mdl 4096] Endgame KRB-KRN} f3 33. g3 $2 (33. gxf3 a3 34. bxa3) 33... Bc4 34. Nf4 (34. Re8+ Kg7 35. Ne5) 34... Rd6 35. h4 Rd2 {[%mdl 64] Double Attack} 36. Re7 Rxf2 37. Nxh5 Rxb2 38. Rd7 Bf7 39. Rd8+ Kh7 {( -> ... Rb1+)} 40. Rd7 Kg6 {Threatens to win with ...Rb1+.} 41. Nf4+ Kf6 {White must now prevent ...Rb1+.} 42. g4 Rb1+ 43. Kh2 f2 44. g5+ hxg5 45. hxg5+ Kg7 46. Nh5+ Kf8 {Weighted Error Value: White=0.78/Black=0.10} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "1.8"] [White "Yoo, Christopher Woojin"] [Black "Mendonca, Leon Luke"] [Result "1-0"] [ECO "B90"] [WhiteElo "2455"] [BlackElo "2549"] [Annotator "TA"] [PlyCount "167"] [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 9,167,31,32,-7,-2,-58,22,0,13,0,9,-91,-29,-69,14,0,40,0,0,0,110,108,118, 108,140,127,164,24,99,54,68,24,24,18,20,19,12,-29,46,-27,-9,-26,-14,-31,-28, -27,-22,-22,-18,-33,-2,-84,-78,-80,-37,-173,-4,-56,145,143,141,136,153,153,154, 154,162,173,164,170,275,253,238,166,155,154,155,152,237,152,155,146,210,224, 182,109,140,0,89,92,104,0,175,165,170,185,194,152,200,162,239,238,350,0,183,0, 317,169,202,196,209,188,251,0,161,0,253,249,249,239,288,285,302,237,245,188, 239,200,170,0,221,184,219,215,339,339,340,381,309,391,389,390,392,392,373,356, 343,292,255,224,558,564,898,895,870,852,1076,1031,1263,1247]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Qe2 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.} e5 7. Nf5 (7. Nb3 $11) 7... g6 (7... d5 $1 $15) 8. Nh6 $11 {The position is equal.} Be6 9. Bg5 {[#]} Nbd7 $146 ({ Predecessor:} 9... Be7 10. Qd2 Nbd7 11. Bd3 Nc5 12. h4 Rc8 13. O-O Nh5 14. g3 Bxg5 15. hxg5 f6 16. gxf6 Nxd3 {1-0 (27) Skytte,R (2402)-Teplyi,I (2433) Aarhus 2016}) 10. g3 {[#]} (10. Qf3 $11) 10... Rc8 (10... Qb6 $1 $17 {[%CAl Rb6b2]} 11. O-O-O Qa5) 11. Bg2 Be7 (11... Qb6 $15 12. O-O-O Qa5) 12. O-O Qb6 13. Rab1 Bc4 14. Qf3 $36 {[%mdl 2048] White has some pressure.} Kf8 (14... Bxf1 $11 {keeps the balance.} 15. Rxf1 Rf8) 15. Bh3 $16 Qd8 16. Rfd1 Be6 17. Bxe6 fxe6 18. Ng4 ({Only move:} 18. Bxf6 $18 Nxf6 19. g4) 18... Kg7 (18... Rc6 $1 $11 {remains equal.}) 19. Bh6+ Kf7 20. Rd2 Rc6 21. Rbd1 Qb6 22. Nxf6 Nxf6 23. b3 Rhc8 (23... Qc7 $11 24. Rd3 Rc8) 24. Rd3 (24. Na4 $14 Qc7 25. c4) 24... Kg8 (24... Qc7 {seems wilder.} 25. Bd2 Kg8 26. h4 b5 27. a3 h5) 25. Bg5 Rf8 { Threatens to win with ...Nxe4!} 26. Qe2 Qc7 27. Bd2 b5 28. a3 Qb6 29. Rf3 Kg7 30. b4 (30. a4 $11) 30... Rc4 $17 31. Bg5 Qc6 32. Qd2 (32. Qe3 $15) 32... Rd4 $2 (32... Nxe4 $19 33. Bh6+ Kg8 34. Rxf8+ Bxf8 35. Nxe4 Rd4 36. Nf6+ Kf7) 33. Rd3 (33. Qe3 $1 $11) 33... Rc4 $2 (33... Rc8 $15 {keeps the upper hand.} 34. Qe1 (34. Rxd4 exd4 35. Nb1 Qxe4 $17) 34... Rc4 35. Bxf6+ Kxf6 36. Rf3+ Kg7) 34. Bh6+ $16 {[%mdl 64] [#] Skewer} Kg8 {Hoping for ...Rc8.} 35. Bxf8 Kxf8 36. Re1 Kg7 37. Re2 h6 38. f3 Nd7 39. Nd1 Qc8 (39... Qb6+ $142 40. Ne3 Nf6) 40. Ne3 $18 Rc6 41. h4 h5 42. Re1 Nb6 43. Rd1 Qf8 (43... Kh7 $16 44. Rf1 Qe8) 44. Qf2 Na4 45. R1d2 Nb2 (45... Qf7 $16 46. c3 Qf8) 46. Rb3 Na4 47. Ng2 (47. f4 $18) 47... Bd8 48. Ne3 (48. Qa7+ $16 Qf7 49. Qxf7+ Kxf7 50. Kf1) 48... Bb6 (48... Be7 $1 $11) 49. Kg2 $16 Bd4 50. Rbd3 (50. f4 $16) 50... Bb6 $2 (50... Bc3 $1 $11 { and Black has nothing to worry.}) 51. Qe2 Nb2 52. Rb3 Na4 53. Nd1 Bd8 54. Rbd3 Nb6 (54... Be7 $142 55. c3 Kg8) 55. Ne3 $18 Na4 (55... Be7 $142 56. c3 Qf6) 56. Qf2 (56. c4 $142) 56... Bb6 57. Qe2 $2 ({White should try} 57. c3 $18) 57... Bd8 $2 {[%mdl 8192]} (57... Nb2 $11) 58. Qe1 (58. c4 $142) 58... Bb6 59. Nd1 Ba7 60. Qe2 Bb6 (60... Bb8 $142 61. c3 Nb6) 61. Rb3 $2 (61. c3 $18) 61... Bd4 $2 (61... Bd8 $1 $11 {and Black stays safe.}) 62. Rbd3 (62. Qd3 $142) 62... Bb6 $1 63. c3 Ba7 64. Rc2 Qc8 65. Qd2 Qc7 66. Nb2 Nb6 67. Qe2 Qc8 (67... d5 { was worth a try.} 68. Qd1 Bb8) 68. Rcd2 Bb8 69. Qe3 $2 (69. Qd1 $18) 69... Qf8 $2 (69... Nc4 $1 $11 70. Qg5 (70. Nxc4 $2 bxc4 71. Qg5 cxd3 $19) 70... Nxd2 71. Qxd2 Bc7) 70. Rf2 Ba7 {intending ...Nc8.} 71. Qe1 Bb8 (71... Qe7 $142 72. Re2 Qb7) 72. f4 exf4 73. Rxf4 ({Less strong is} 73. gxf4 d5 $16) 73... Qe7 74. Rdf3 {Qf2 is the strong threat.} Nd7 75. Nd3 e5 76. Rf7+ $1 Qxf7 77. Rxf7+ Kxf7 78. Qe3 Nf6 79. Nf2 Ke6 $2 (79... Bc7 {is tougher.} 80. Qd3 Ke7) 80. Qh6 {White is clearly winning.} Kf7 {If Black can now play ...Bc7 this consolidates a bit.} 81. Nh3 Nxe4 82. Qh7+ Ke6 83. Qxg6+ {[%mdl 64] Double Attack} Nf6 84. Ng5+ { Weighted Error Value: White=0.47/Black=0.50} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "1.9"] [White "Shuvalova, Polina"] [Black "Keymer, Vincent"] [Result "0-1"] [ECO "E20"] [WhiteElo "2476"] [BlackElo "2591"] [Annotator "TA"] [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"] {[%evp 13,72,-2,-8,-13,16,11,34,-224,-224,-222,-214,-213,-212,-227,-200,-241, -232,-232,-230,-221,-216,-281,-216,-309,-300,-347,-311,-376,-368,-380,-387, -460,-409,-397,-397,-568,-561,-549,-548,-587,-578,-731,-733,-789,-758,-840, -817,-851,-862,-940,-922,-1070,-1062,-1086,-1097,-1087,-1088,-1833,-1378,-1538, -1509]} 1. d4 {Krasenkow,M} Nf6 2. c4 e6 3. Nf3 d5 4. g3 Bb4+ 5. Nc3 O-O 6. Bg2 dxc4 7. O-O Nc6 {[%CAl Bb8c6,Bc6d4,Bd4b3][%mdl 32]} 8. Qa4 {E20: Nimzo-Indian: 4 g3 and 4 f3.} Bd7 9. Bg5 a5 {[#]} 10. a3 $2 $146 {[%mdl 8192] [#]} (10. Bxf6 $14 {stays ahead.} gxf6 11. Qc2) ({Predecessor:} 10. Bxf6 Qxf6 11. a3 Bxc3 12. bxc3 Qd8 13. Qxc4 a4 14. Nd2 Na5 15. Qb4 Ra7 16. Rab1 {1-0 (30) Caruana,F (2822) -Karjakin,S (2773) Saint Louis 2018 CBM 186 [Krasenkow,M]}) 10... Nxd4 $1 $19 {[%mdl 512]} 11. Qd1 Bxc3 12. bxc3 Nb3 13. Ne5 {Black must now prevent Bxf6.} Bb5 ({Weaker is} 13... Nxa1 14. Bxf6 Qxf6 15. Nxd7 $17) 14. Rb1 Qxd1 15. Rfxd1 {[#]} Nd5 {[%CAl Rd5c3]} 16. Bxd5 exd5 17. Bf4 c6 18. Nd7 (18. Nf3 $142) 18... Rfe8 19. Kf1 f6 20. Nb6 Ra6 21. Bc7 {White hopes to continue with a4.} a4 22. f3 Kf7 23. e4 d4 24. Rb2 (24. Rxd4 $142 Nxd4 25. cxd4) 24... Re7 {Black is clearly winning.} 25. Bd8 Re6 26. Kf2 d3 27. f4 Ke8 (27... Rxe4) 28. Bc7 Re7 29. Bd6 Rxb6 30. Bxe7 Kxe7 31. Ke3 c5 32. g4 Re6 33. e5 fxe5 34. f5 Rh6 { ...Rh3+ is the strong threat.} 35. Rg1 d2 36. Ke4 Rxh2 {Black took control after the opening. Weighted Error Value: White=0.68/Black=0.07} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "1.10"] [White "Bjerre, Jonas Buhl"] [Black "Gukesh D"] [Result "1-0"] [ECO "E04"] [WhiteElo "2550"] [BlackElo "2578"] [Annotator "Shahid"] [PlyCount "35"] [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 0,35,29,20,20,6,11,18,4,-22,-10,-20,26,21,22,22,22,0,29,-32,-37,-37,50, 0,58,83,-40,-62,245,245,227,242,274,259,286,292,350,369]} 1. d4 {[%emt 0:00:00] } d5 {[%emt 0:00:00]} 2. c4 {[%emt 0:00:00]} e6 {[%emt 0:00:05]} 3. Nf3 { [%emt 0:00:02]} Nf6 {[%emt 0:00:02]} 4. g3 {[%emt 0:00:02]} dxc4 {[%emt 0:00: 08]} 5. Bg2 {[%emt 0:00:03]} a6 {[%emt 0:00:02]} 6. Ne5 {[%emt 0:00:11]} Bb4+ { [%emt 0:00:15]} 7. Nc3 {[%emt 0:00:04]} Nd5 {[%emt 0:00:04]} 8. O-O {[%emt 0: 00:31]} O-O {[%emt 0:00:10]} 9. Ne4 {[%emt 0:00:20]} b5 {[%emt 0:02:11]} 10. b3 {[%emt 0:00:07]} Bb7 {[%emt 0:02:31]} (10... cxb3 11. axb3 Bb7) 11. bxc4 { [%emt 0:01:15]} Nc3 {[%emt 0:02:28]} 12. Qc2 {[%emt 0:01:56]} Qxd4 $2 {[%emt 0: 02:19]} (12... Nxe4 13. Bxe4 Bxe4 14. Qxe4 c6) 13. Ng5 $18 {[%emt 0:01:23]} Nxe2+ {[%emt 0:00:13]} 14. Qxe2 {[%emt 0:01:27]} (14. Kh1) 14... Bxg2 {[%emt 0: 00:02]} 15. Kxg2 {[%emt 0:00:56]} Qxa1 {[%emt 0:00:20]} 16. Bb2 {[%emt 0:00:27] } Qxa2 {[%emt 0:00:05]} 17. Qc2 {[%emt 0:00:44]} f5 {[%emt 0:00:21]} 18. Ra1 { [%emt 0:00:09]} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "2.1"] [White "Zhu, Jiner"] [Black "Gukesh D"] [Result "0-1"] [ECO "B12"] [WhiteElo "2459"] [BlackElo "2578"] [Annotator "Shahid"] [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 0,98,31,36,77,66,60,69,70,69,45,35,59,22,54,15,18,-2,-3,-7,11,27,20,-68, -91,-85,-85,-76,-48,-34,-36,-61,-66,-66,-55,-74,-68,-64,-64,-60,-60,-58,-22, -59,-40,-28,-30,-32,-26,-17,-19,-26,-13,0,0,0,0,-48,-29,-53,-53,-51,-42,-36, -36,-72,-72,-65,-56,-60,-66,-62,-76,-120,-94,-143,-110,-97,-83,-76,-90,-85,-64, -73,-64,-111,-72,-102,-102,-102,-80,-102,-37,-143,-143,-257,-256,-307,-272, -281,-427]} 1. e4 {[%emt 0:00:00]} c6 {[%emt 0:00:00]} 2. d4 {[%emt 0:00:00]} d5 {[%emt 0:00:00]} 3. e5 {[%emt 0:00:00]} Bf5 {[%emt 0:00:00]} 4. Nf3 { [%emt 0:00:00]} e6 {[%emt 0:00:07]} 5. Be2 {[%emt 0:00:01]} Ne7 {[%emt 0:00:15] } 6. O-O {[%emt 0:00:07]} Nd7 {[%emt 0:00:02]} 7. c3 {[%emt 0:00:16]} Ng6 { [%emt 0:00:30]} 8. Ne1 {[%emt 0:01:32]} h5 {[%emt 0:00:03]} 9. Be3 {[%emt 0:00: 14]} (9. a4) 9... f6 {[%emt 0:01:16]} 10. Bxh5 $6 {[%emt 0:01:44]} (10. f4) 10... fxe5 {[%emt 0:00:04]} 11. Bxg6+ {[%emt 0:00:43]} (11. g4 $2 Rxh5 12. gxh5 Nf4) 11... Bxg6 {[%emt 0:00:03]} 12. dxe5 {[%emt 0:00:03]} Nxe5 {[%emt 0:00:41] } 13. Bd4 {[%emt 0:00:40]} Nd7 {[%emt 0:02:14]} 14. Qe2 {[%emt 0:00:56]} Qe7 { [%emt 0:00:29]} 15. Nd3 {[%emt 0:00:44]} Bxd3 {[%emt 0:02:37]} 16. Qxd3 { [%emt 0:00:03]} e5 {[%emt 0:00:33]} 17. Qg6+ {[%emt 0:00:50]} Qf7 {[%emt 0:00: 06]} 18. Qxf7+ {[%emt 0:00:01]} Kxf7 {[%emt 0:00:01]} 19. Be3 {[%emt 0:00:01]} Bd6 {[%emt 0:00:08]} 20. Nd2 {[%emt 0:00:41]} Kg6 {[%emt 0:00:38]} 21. h3 { [%emt 0:00:06]} Rae8 {[%emt 0:00:09]} 22. Rad1 {[%emt 0:00:04]} Bc5 {[%emt 0: 00:31]} 23. Ne4 {[%emt 0:00:43]} Bxe3 {[%emt 0:00:06]} 24. fxe3 {[%emt 0:00:02] } Re7 {[%emt 0:00:16]} 25. Ng3 {[%emt 0:00:13]} Nc5 {[%emt 0:00:14]} 26. e4 { [%emt 0:00:42]} Rd8 {[%emt 0:00:22]} 27. exd5 {[%emt 0:00:54]} cxd5 {[%emt 0: 00:03]} 28. Rfe1 {[%emt 0:00:03]} Rdd7 {[%emt 0:00:03]} 29. Re2 {[%emt 0:00:04] } e4 {[%emt 0:00:13]} 30. Rf1 {[%emt 0:00:36]} Re5 {[%emt 0:00:29]} 31. Re3 { [%emt 0:00:08]} Rf7 {[%emt 0:00:08]} 32. Ne2 {[%emt 0:00:04]} Rxf1+ {[%emt 0: 00:01]} 33. Kxf1 {[%emt 0:00:00]} Nd3 {[%emt 0:00:02]} 34. b3 {[%emt 0:00:06]} Kf6 {[%emt 0:00:05]} 35. Nd4 {[%emt 0:00:02]} Re7 {[%emt 0:00:06]} 36. g3 { [%emt 0:00:04]} Ke5 {[%emt 0:00:04]} 37. Ke2 {[%emt 0:00:17]} Rf7 {[%emt 0:00: 03]} 38. Kd2 {[%emt 0:00:09]} Rf1 {[%emt 0:00:08]} 39. a4 {[%emt 0:00:07]} Rh1 {[%emt 0:00:04]} 40. h4 {[%emt 0:00:01]} Rh2+ {[%emt 0:00:08]} 41. Re2 { [%emt 0:00:02]} Rh1 {[%emt 0:00:03]} 42. Re3 {[%emt 0:00:01]} a6 {[%emt 0:00: 02]} 43. Re2 {[%emt 0:00:04]} g6 {[%emt 0:00:07]} 44. Re3 {[%emt 0:00:02]} Kd6 {[%emt 0:00:02]} 45. Re2 {[%emt 0:00:04]} Rg1 {[%emt 0:00:02]} 46. Re3 { [%emt 0:00:05]} Rg2+ {[%emt 0:00:01]} 47. Ne2 {[%emt 0:00:01]} Ne5 {[%emt 0:00: 11]} 48. c4 {[%emt 0:00:23]} Ng4 {[%emt 0:00:08]} 49. c5+ {[%emt 0:00:18]} Ke5 {[%emt 0:00:08]} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "2.2"] [White "Keymer, Vincent"] [Black "Bjerre, Jonas Buhl"] [Result "1-0"] [ECO "D38"] [WhiteElo "2591"] [BlackElo "2550"] [Annotator "ChessBase"] [PlyCount "87"] [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"] 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 0:00:00]} Bb4 {[%emt 0:00:01]} 5. Qa4+ {[%emt 0:00:04]} Nc6 {[%emt 0:00:03]} 6. e3 {[%emt 0: 00:00]} O-O {[%emt 0:00:09]} 7. Bd2 {[%emt 0:00:03]} dxc4 {[%emt 0:00:25]} 8. Bxc4 {[%emt 0:00:00]} Bd6 {[%emt 0:00:02]} 9. Qc2 {[%emt 0:00:03]} e5 {[%emt 0: 00:22]} 10. dxe5 {[%emt 0:00:14]} Nxe5 {[%emt 0:00:03]} 11. Nxe5 {[%emt 0:00: 00]} Bxe5 {[%emt 0:00:01]} 12. O-O {[%emt 0:00:01]} c6 {[%emt 0:01:09]} 13. h3 {[%emt 0:00:39]} Nd5 {[%emt 0:01:51]} 14. Ne2 {[%emt 0:02:37]} Qf6 {[%emt 0:01: 47]} 15. Bxd5 {[%emt 0:00:13]} cxd5 {[%emt 0:00:18]} 16. Bc3 {[%emt 0:00:01]} Bf5 {[%emt 0:00:33]} 17. Bxe5 {[%emt 0:00:05]} Qxe5 {[%emt 0:00:06]} 18. Qc3 { [%emt 0:00:01]} Qd6 {[%emt 0:00:29]} 19. Rac1 {[%emt 0:00:47]} Rac8 {[%emt 0: 00:10]} 20. Qd4 {[%emt 0:00:12]} Qa6 {[%emt 0:00:16]} 21. Nc3 {[%emt 0:00:51]} Be6 {[%emt 0:00:32]} 22. Rfd1 {[%emt 0:00:37]} Rc4 {[%emt 0:00:10]} 23. Qd3 { [%emt 0:00:02]} Rfc8 {[%emt 0:00:28]} 24. b3 {[%emt 0:00:28]} R4c7 {[%emt 0:01: 01]} 25. Qxa6 {[%emt 0:00:30]} bxa6 {[%emt 0:00:01]} 26. Ne2 {[%emt 0:00:10]} Rc2 {[%emt 0:00:02]} 27. Kf1 {[%emt 0:01:20]} a5 {[%emt 0:00:37]} 28. a3 { [%emt 0:00:26]} g6 {[%emt 0:00:15]} 29. Rxc2 {[%emt 0:00:14]} Rxc2 {[%emt 0:00: 02]} 30. Nd4 {[%emt 0:00:00]} Rc3 {[%emt 0:00:22]} 31. Ke1 {[%emt 0:00:17]} a4 {[%emt 0:00:26]} 32. Kd2 {[%emt 0:00:04]} Rc7 {[%emt 0:00:14]} 33. b4 {[%emt 0: 00:02]} Kf8 {[%emt 0:00:33]} 34. Rc1 {[%emt 0:00:02]} Rxc1 {[%emt 0:00:03]} 35. Kxc1 {[%emt 0:00:00]} Bd7 {[%emt 0:00:02]} 36. Kd2 {[%emt 0:00:12]} Ke7 { [%emt 0:00:03]} 37. Kc3 {[%emt 0:00:07]} Kd6 {[%emt 0:00:01]} 38. Nf3 {[%emt 0: 00:15]} f6 {[%emt 0:00:05]} 39. Kd4 {[%emt 0:00:02]} Bb5 {[%emt 0:00:04]} 40. h4 {[%emt 0:00:07]} Bf1 {[%emt 0:00:10]} 41. g3 {[%emt 0:00:02]} Be2 {[%emt 0: 00:01]} 42. Nd2 {[%emt 0:00:12]} a6 {[%emt 0:00:16]} 43. e4 {[%emt 0:01:04]} dxe4 {[%emt 0:00:22]} 44. Nxe4+ {[%emt 0:00:01]} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "2.3"] [White "Mendonca, Leon Luke"] [Black "Shuvalova, Polina"] [Result "1/2-1/2"] [ECO "D41"] [WhiteElo "2549"] [BlackElo "2476"] [Annotator "Shahid"] [PlyCount "202"] [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 26,202,18,0,0,0,30,0,0,-45,-36,-76,-30,-100,-66,-89,-45,-116,-45,-56, -14,-49,0,0,244,141,138,140,127,129,170,14,3,-11,-38,-94,-91,-104,-50,-51,-20, -15,1006,0,38,34,24,23,32,-11,-12,-127,-98,-99,-103,-102,-100,-110,-102,-97, -77,-152,-104,-104,-108,-103,0,-20,-12,-80,0,0,0,-4,58,0,0,0,0,-17,0,0,2,2,48, 48,48,48,48,26,26,4,4,4,97,97,306,277,156,2,2,2,2,0,0,0,2,2,2,2,2,2,2,2,2,2,2, 0,2,0,0,0,0,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,109,2,2,2,9,9,9,9,9,9,9, 9,9,9,9,2,9,0,9,9,9,9,9,9,9,9,9,0,9,0,0,0,0,0,0]} 1. d4 {Tsesarsky,I} Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 c5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 cxd4 8. cxd4 Bb4+ 9. Bd2 Bxd2+ 10. Qxd2 O-O 11. Bc4 Nd7 12. O-O b6 13. Rfe1 Bb7 14. Rad1 Rc8 {D41: Queen's Gambit Declined: Semi-Tarrasch with 5 cxd5.} 15. Bd3 Re8 16. h4 h6 {[#] } 17. d5 $146 ({Predecessor:} 17. Bb5 Re7 18. Bxd7 Rxd7 19. Ne5 Rdc7 20. Qf4 Qd6 21. Qg4 Rc2 22. Qh5 R8c7 23. Ng4 Rxa2 {1-0 (50) Mamedyarov,S (2607) -Marcelin,C (2503) Istanbul 2003 CBM 096 [Tsesarsky,I]}) 17... exd5 18. e5 Nc5 19. Bf5 (19. Nd4 $11 {keeps the balance.}) 19... Rc7 20. h5 Rce7 21. Bb1 $6 ( 21. Qf4 $15) 21... Qc8 (21... d4 $17 22. Nxd4 Rxe5 23. Rxe5 Rxe5) 22. Qf4 $15 Ne4 23. Rc1 Qd7 (23... Qd8 {feels hotter.} 24. Bd3 Nc5 25. Bb5 Rf8 26. Nd4 a6) 24. Nd4 Rc8 $2 (24... Rxe5 $11 25. f3 Qa4 $1) 25. f3 (25. Bxe4 $18 dxe4 26. Nf5 Rxc1 27. Rxc1 (27. Nxe7+ Qxe7 28. Rxc1 Qd7 $16)) 25... Rxc1 26. Rxc1 Ng5 27. Nf5 $1 {[%mdl 1024] White has strong compensation.} Re8 28. Qd4 $2 (28. Qg4 $1 $18 Kf8 29. f4 Qa4 (29... Ne6 30. Nxg7) 30. Nd6 $18) 28... Rc8 $1 $132 { [%CAl Rc8c1][%mdl 2048] Black is not keeping still} 29. Re1 Rc4 30. Qd3 (30. Qd2 $15) 30... Qc7 $17 31. Kh2 Rc3 (31... Qc5 $1 $17 32. Qd2 Rc3) 32. Qb5 $15 { Qe8+ would kill now.} Bc6 33. Qb4 Rc4 $4 {[%mdl 8192]} (33... Rc5 $11) 34. Qd6 $2 (34. Ne7+ $1 $18 Kf8 (34... Kh8 35. Ng6+) 35. Ng6+ {[%mdl 64] Discovered Attack (Double check)} Ke8 36. Qf8+ {[%mdl 64] Double Attack} Kd7 37. Bf5+ Ne6 38. Qxf7+ Kc8 39. Ne7+ Kb7 40. Qxe6) 34... Qxd6 35. exd6 Ne6 $1 36. Ne7+ $1 Kf8 37. Bf5 (37. Ng6+ $5 Ke8 38. f4 fxg6 39. Rxe6+ Kd7 40. Rxg6 Rxf4 41. Rxg7+ Kxd6 42. Rg6+ {[%mdl 64] Double Attack} Kc5 43. Rxh6 $14) 37... Bd7 38. Nxd5 (38. Ng6+ $1 $11 {remains equal.} Ke8 39. Ne5) 38... Rh4+ 39. Kg3 Rxh5 40. Bxe6 fxe6 $17 {[%mdl 4096] Endgame KRB-KRN} ({But not} 40... Bxe6 $6 41. Nf4 $11) 41. Nf4 Rg5+ 42. Kh2 Kf7 43. Nd3 ({Better is} 43. Rc1) 43... Kf6 (43... Rd5 44. Ne5+ Ke8) 44. Rc1 Rd5 45. Nf2 Ba4 (45... e5 $17 46. Rc7 Ke6 47. Rxa7 Kxd6 48. Ne4+ Kc6) 46. Rc7 a5 47. Ne4+ {[#]} (47. Rb7 $1 $11) 47... Kg6 ({Black should play} 47... Ke5 $1 $17) 48. Re7 e5 (48... Rd3 {is more complex.} 49. Rxe6+ Kf5 50. Re7 Bc6 51. Rxg7 Bxe4 52. fxe4+ Kxe4 53. Rg6 h5) 49. Rb7 b5 (49... Bc2 $11 50. Rxb6 Bxe4 51. fxe4 Rd4) 50. Rb6 (50. d7 $14 b4 {[#]} 51. Nc5 $1 Bxd7 52. Nxd7) 50... Kf7 51. Nc3 Rd4 52. Nxb5 (52. Ra6 {keeps more tension.} Ke6 53. Rxa5 Rxd6 54. Nxa4 bxa4 55. Rxa4 Kf6 56. Kg3) 52... Bxb5 (52... Rb4 {is more complex.} 53. Rb7+ Kf6 54. d7 Ke7 55. d8=R+ Kxd8 56. Nd6 Rd4) 53. Rxb5 {[%mdl 64] Double Attack} Rxd6 (53... Kf6 {seems wilder.} 54. Rxa5 Rxd6 55. a4 Rd4 56. Kg3 e4) 54. Rxe5 $11 {KR-KR} Ra6 (54... a4 $5 {[%CAl Rd6d2]}) 55. a4 Kf6 56. Rb5 g5 57. Kg3 h5 58. Kf2 h4 59. Kg1 Kg6 (59... Rd6 $11) 60. Kh2 $16 Kh5 $2 (60... Ra7 $16 ) 61. Kh3 $18 Rc6 (61... Kh6 $18 62. Kg4 Rd6) 62. f4 $2 (62. Rxa5 $16 { Strongly threatening Ra8.} Rc3 63. Kh2) 62... Rc3+ $11 63. Kh2 Kg4 $1 64. Rxg5+ Kxf4 65. Rxa5 Ra3 66. Ra8 Kg5 67. a5 Kg6 68. a6 Kg7 69. Kg1 Ra2 70. Kf1 (70. a7 {looks sharper.} Ra4 71. Kh2 Kh7 72. Rb8 Rxa7 73. Rb4) 70... Kh7 71. a7 Kg7 72. Ke1 Kh7 73. Kd1 Kg7 74. Kc1 Kh7 75. Kb1 Ra6 76. Kb2 {Hoping for Kc3.} Kg7 77. Kc3 Ra4 78. Kb3 Ra1 79. Kc4 {And now Kb4 would win.} Kh7 80. Kd5 Ra5+ 81. Ke6 { aiming for Kd6.} Ra1 82. Kf5 {Black must now prevent Kf6.} Ra5+ 83. Kg4 Ra4+ $1 84. Kh5 Kg7 85. Rc8 Rxa7 {The position is equal.} 86. Kxh4 Ra5 87. Rc6 Rb5 88. Re6 Ra5 89. Kg4 Ra2 90. g3 Ra5 91. Kf4 Ra4+ 92. Kf5 Ra5+ 93. Re5 Ra7 94. Kg5 Rb7 95. g4 Ra7 96. Kh5 $1 Rb7 97. g5 Ra7 98. Rf5 Rb7 99. g6 Ra7 100. Rf7+ Rxf7 101. gxf7 Kxf7 {Weighted Error Value: White=0.32/Black=0.35} 1/2-1/2 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "2.4"] [White "Abdumalik, Zhansaya"] [Black "Yoo, Christopher Woojin"] [Result "1/2-1/2"] [ECO "B40"] [WhiteElo "2472"] [BlackElo "2455"] [Annotator "ChessBase"] [PlyCount "84"] [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"] 1. e4 {[%emt 0:00:00]} c5 {[%emt 0:00:00]} 2. Nf3 {[%emt 0:00:00]} e6 {[%emt 0: 00:00]} 3. d4 {[%emt 0:00:00]} cxd4 {[%emt 0:00:00]} 4. Nxd4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 5. Nc3 {[%emt 0:00:01]} Bb4 {[%emt 0:00:02]} 6. Bd3 { [%emt 0:00:40]} d6 {[%emt 0:00:04]} 7. O-O {[%emt 0:00:06]} O-O {[%emt 0:00:21] } 8. Nce2 {[%emt 0:00:39]} e5 {[%emt 0:01:00]} 9. Nb3 {[%emt 0:00:14]} d5 { [%emt 0:00:32]} 10. exd5 {[%emt 0:00:22]} Nxd5 {[%emt 0:02:11]} 11. Ng3 { [%emt 0:01:04]} Nc6 {[%emt 0:00:36]} 12. c3 {[%emt 0:00:13]} Be7 {[%emt 0:00: 08]} 13. Nf5 {[%emt 0:00:40]} Bg5 {[%emt 0:02:19]} 14. Qh5 {[%emt 0:00:33]} h6 {[%emt 0:00:23]} 15. Bxg5 {[%emt 0:01:00]} Qxg5 {[%emt 0:00:03]} 16. Qxg5 { [%emt 0:00:01]} hxg5 {[%emt 0:00:00]} 17. Nd6 {[%emt 0:00:02]} Rd8 {[%emt 0:00: 41]} 18. Nxc8 {[%emt 0:00:11]} Raxc8 {[%emt 0:00:00]} 19. Rfd1 {[%emt 0:00:15]} Nce7 {[%emt 0:00:08]} 20. Be4 {[%emt 0:00:38]} f5 {[%emt 0:00:08]} 21. Bxd5+ { [%emt 0:00:06]} Nxd5 {[%emt 0:00:14]} 22. Re1 {[%emt 0:00:03]} e4 {[%emt 0:00: 44]} 23. Nd4 {[%emt 0:00:16]} g6 {[%emt 0:00:03]} 24. Ne6 {[%emt 0:00:13]} Rd6 {[%emt 0:00:03]} 25. Nxg5 {[%emt 0:00:03]} Nf4 {[%emt 0:00:02]} 26. g3 { [%emt 0:00:35]} Nd3 {[%emt 0:00:02]} 27. Re2 {[%emt 0:00:01]} Rb6 {[%emt 0:00: 11]} 28. f3 {[%emt 0:00:44]} exf3 {[%emt 0:00:14]} 29. Nxf3 {[%emt 0:00:02]} Nxb2 {[%emt 0:00:37]} 30. Rb1 {[%emt 0:00:08]} Na4 {[%emt 0:00:43]} 31. Rxb6 { [%emt 0:00:05]} axb6 {[%emt 0:00:04]} 32. Nh4 {[%emt 0:00:05]} Kf7 {[%emt 0:00: 09]} 33. Rd2 {[%emt 0:00:09]} Nc5 {[%emt 0:00:03]} 34. Nf3 {[%emt 0:00:21]} Ke7 {[%emt 0:00:10]} 35. Re2+ {[%emt 0:00:24]} Kf6 {[%emt 0:00:06]} 36. Rb2 { [%emt 0:00:32]} Rc6 {[%emt 0:00:14]} 37. c4 {[%emt 0:00:05]} Ne4 {[%emt 0:00: 17]} 38. Kg2 {[%emt 0:00:03]} Nd6 {[%emt 0:00:05]} 39. Nd2 {[%emt 0:00:10]} Ke5 {[%emt 0:00:05]} 40. Nf3+ {[%emt 0:00:22]} Kf6 {[%emt 0:00:10]} 41. Nd2 { [%emt 0:00:02]} Ke5 {[%emt 0:00:06]} 42. Nf3+ {[%emt 0:00:02]} Kf6 {[%emt 0:00: 12]} 1/2-1/2 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "2.5"] [White "Khademalsharieh, Sarasadat"] [Black "Liang, Awonder"] [Result "0-1"] [ECO "E65"] [WhiteElo "2494"] [BlackElo "2592"] [Annotator "ChessBase"] [PlyCount "76"] [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"] 1. d4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 2. c4 {[%emt 0:00:00]} g6 {[%emt 0: 00:00]} 3. g3 {[%emt 0:00:02]} Bg7 {[%emt 0:00:00]} 4. Bg2 {[%emt 0:00:01]} O-O {[%emt 0:00:00]} 5. Nc3 {[%emt 0:00:02]} d6 {[%emt 0:00:00]} 6. Nf3 {[%emt 0: 00:02]} c5 {[%emt 0:00:00]} 7. dxc5 {[%emt 0:00:06]} dxc5 {[%emt 0:00:01]} 8. O-O {[%emt 0:00:01]} Nc6 {[%emt 0:00:01]} 9. Bf4 {[%emt 0:00:04]} Be6 {[%emt 0: 00:10]} 10. Ne5 {[%emt 0:00:17]} Qc8 {[%emt 0:00:35]} 11. Nxc6 {[%emt 0:00:12]} bxc6 {[%emt 0:00:00]} 12. b3 {[%emt 0:00:13]} Bh3 {[%emt 0:00:02]} 13. Rc1 { [%emt 0:00:13]} Rd8 {[%emt 0:00:29]} 14. Qc2 {[%emt 0:00:14]} Nh5 {[%emt 0:01: 10]} 15. Be3 {[%emt 0:00:05]} Bd4 {[%emt 0:00:05]} 16. Na4 {[%emt 0:01:12]} Bxe3 {[%emt 0:00:46]} 17. fxe3 {[%emt 0:00:03]} Bxg2 {[%emt 0:00:01]} 18. Kxg2 {[%emt 0:00:01]} Qe6 {[%emt 0:00:08]} 19. Qc3 {[%emt 0:00:50]} Qg4 {[%emt 0:00: 08]} 20. Rf3 {[%emt 0:00:28]} Ng7 {[%emt 0:00:03]} 21. Nxc5 {[%emt 0:00:32]} Nf5 {[%emt 0:00:03]} 22. Kh1 {[%emt 0:00:16]} Rd6 {[%emt 0:00:01]} 23. Rcf1 { [%emt 0:00:10]} Qh3 {[%emt 0:01:22]} 24. Kg1 {[%emt 0:02:11]} Nh6 {[%emt 0:00: 21]} 25. R3f2 {[%emt 0:01:01]} Ng4 {[%emt 0:00:04]} 26. Rg2 {[%emt 0:00:11]} Qh6 {[%emt 0:00:10]} 27. Nd3 {[%emt 0:01:00]} Rad8 {[%emt 0:01:29]} 28. Rf4 { [%emt 0:00:38]} Nxe3 {[%emt 0:00:18]} 29. Rgf2 {[%emt 0:00:02]} Nd1 {[%emt 0: 00:01]} 30. Qa5 {[%emt 0:00:12]} Nxf2 {[%emt 0:00:03]} 31. Nxf2 {[%emt 0:00:01] } Qh5 {[%emt 0:00:35]} 32. Qxa7 {[%emt 0:00:05]} Qxe2 {[%emt 0:00:03]} 33. Re4 {[%emt 0:00:15]} Rd1+ {[%emt 0:00:16]} 34. Kg2 {[%emt 0:00:02]} Qf1+ {[%emt 0: 00:00]} 35. Kf3 {[%emt 0:00:01]} R1d7 {[%emt 0:00:07]} 36. Qc5 {[%emt 0:00:06]} e6 {[%emt 0:00:36]} 37. Qxc6 {[%emt 0:00:22]} Rd3+ {[%emt 0:00:05]} 38. Re3 { [%emt 0:00:07]} Rd2 {[%emt 0:00:00]} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "2.6"] [White "Abdusattorov, Nodirbek"] [Black "Saduakassova, Dinara"] [Result "1-0"] [ECO "C51"] [WhiteElo "2627"] [BlackElo "2500"] [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 16,101,-22,-29,24,0,114,90,165,151,164,171,198,168,276,0,0,-108,-101, -164,-218,-205,-208,-193,-201,-204,-8,-222,-222,-221,-228,-223,-195,-562,-164, -182,-28,-20,-10,-9,-1,-3,-2,-2,66,0,66,66,64,64,49,60,78,10,71,71,71,71,71,30, 30,34,37,37,91,91,91,91,91,91,91,0,0,0,0,0,1238,0,0,0,0,8,3500,2015,4672,128, 4602,1055]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 exd4 7. O-O d6 8. cxd4 Bb6 9. h3 Nge7 {C51: Evans Gambit: Declined and Accepted without 5...Ba5.} (9... h6 $142) 10. Ng5 $11 d5 $2 (10... Rf8 $11 11. Qb3 Bxd4 12. Bxf7+ Rxf7 13. Qxf7+ Kd7 14. Qe6+ Ke8) 11. exd5 $16 Na5 {[#]} (11... Nxd4 $16 12. d6 cxd6) 12. d6 $146 ({Predecessor:} 12. Bb5+ Bd7 13. Qf3 Bxb5 14. Qxf7+ Kd7 15. Qe6+ Ke8 16. Re1 Qd6 17. Qf7+ Kd8 18. Ba3 c5 19. dxc6 Qxd4 20. Ne6+ {1-0 (20) Sa,P-Machado,M Porto 1996}) 12... Nxc4 13. Qa4+ Nc6 {[#]} 14. Re1+ $1 Be6 (14... N4e5 {was worth a try.} 15. Rxe5+ (15. dxe5 O-O $11) 15... Kf8) 15. Qxc4 $2 ({White has to play} 15. Nxe6 $18 fxe6 16. Rxe6+ Kd7 17. Qxc4 (17. dxc7 Qh4 $17)) 15... O-O $36 {[%mdl 2048] Black is more active.} 16. Rxe6 (16. Qd3 $11 g6 17. Nxe6 fxe6 18. Rxe6) 16... fxe6 $17 17. Qxe6+ (17. Nxe6 $17 Na5 18. Qd3 Qxd6 19. Nxf8 Rxf8 20. Be3) 17... Kh8 $19 18. Qe4 {[%csl Gg5][%CAl Re4h7]} g6 19. Qh4 {[%csl Gg5][%CAl Rh4h7]} h5 20. Bb2 Qf6 $2 (20... Qxd6 $19 { [%CAl Rb6d4]} 21. Nc3 Rf4) 21. Nd2 $2 (21. Nc3 $1 $11 {and White has nothing to worry.} Nxd4 22. Re1 cxd6 23. Nd5 Nf3+ {[%mdl 64] Discovered Attack} 24. Nxf3 Qxb2 25. Qg3) 21... Bxd4 ({And not} 21... cxd6 22. Nde4 $15) 22. Nde4 Qe5 ({Avoid the trap} 22... Bxb2 $2 23. Nxf6 Bxf6 24. Rb1 $18) 23. Bxd4 Nxd4 24. Rb1 $2 (24. Rd1 {was the crucial defense.}) 24... Nf5 $2 (24... cxd6 25. f3 d5) 25. Nf3 Nxh4 $2 (25... Qd5 $19 26. Qf4 Rae8) 26. Nxe5 $11 cxd6 27. Nxd6 Rf6 { Black wants to play ...Raf8.} 28. Ndf7+ Kg8 29. Rxb7 Rf8 (29... g5 $11) 30. Nh6+ $14 Kh8 31. Nd7 {[%mdl 64] Double Attack} Rxf2 32. Nxf8 Rxf8 33. Rxa7 { [%mdl 4096] Endgame KRN-KRN} Rb8 34. Ra4 ({White should play} 34. Kh2 $16) 34... Kg7 35. Rxh4 $16 Kxh6 {KR-KR} 36. Rf4 Rb2 37. Rf2 Rb1+ 38. Rf1 Rb4 39. a3 {[%CAl Ba2a3,Ba3a4][%mdl 32]} Rb2 (39... Rc4 $14) 40. Ra1 {Hoping for a4.} Rb5 41. a4 Ra5 42. Kf2 Kg5 43. Ke3 (43. Kg3 $16) 43... Kh4 $1 $11 44. Kf3 Rf5+ 45. Ke4 Kg3 $2 {[%mdl 8192]} (45... Rf2 $11) 46. Ra2 $2 (46. Ra3+ $18 Kxg2 47. a5) 46... Ra5 47. Kd4 g5 $1 48. Kc4 {aiming for Kb4.} h4 $2 {[%mdl 8192]} (48... g4 $11) 49. Kb4 $18 Ra8 50. a5 {Threatens to win with a6.} Rb8+ $2 {[%mdl 8192]} ( 50... g4 $16) 51. Kc5 {Weighted Error Value: White=0.57/Black=0.52} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "2.7"] [White "Murzin, Volodar"] [Black "Salimova, Nurgyul"] [Result "0-1"] [ECO "B13"] [WhiteElo "2478"] [BlackElo "2397"] [Annotator "Shahid"] [PlyCount "62"] [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 0,62,20,19,69,69,69,58,47,22,32,40,56,29,47,31,31,-5,-26,-21,-23,-30, -19,-28,-12,-24,-24,-38,0,-24,21,33,0,18,22,22,0,-147,-79,-162,-172,-169,-176, -162,-158,-206,-195,-201,-429,-547,-590,-668,-178,-445,-142,-481,-126,-621, -621,-636,-636,-661,-672,-671,-665]} 1. e4 {[%emt 0:00:00]} c6 {[%emt 0:00:00]} 2. d4 {[%emt 0:00:11]} d5 {[%emt 0:00:00]} 3. exd5 {[%emt 0:00:12]} cxd5 { [%emt 0:00:00]} 4. Bd3 {[%emt 0:00:04]} Nf6 {[%emt 0:00:02]} 5. c3 {[%emt 0:00: 06]} Bg4 {[%emt 0:00:08]} 6. Ne2 {[%emt 0:00:03]} e6 {[%emt 0:01:13]} 7. O-O { [%emt 0:00:05]} Nc6 {[%emt 0:00:20]} 8. Qe1 {[%emt 0:00:05]} Bd6 {[%emt 0:01: 06]} 9. f3 {[%emt 0:00:03]} Bh5 {[%emt 0:00:04]} 10. Qh4 {[%emt 0:00:03]} h6 { [%emt 0:02:40]} 11. Ng3 {[%emt 0:01:49]} Bg6 {[%emt 0:00:51]} 12. Bxg6 { [%emt 0:00:36]} fxg6 {[%emt 0:00:02]} 13. f4 {[%emt 0:01:11]} Qd7 {[%emt 0:00: 36]} 14. Nd2 {[%emt 0:00:40]} O-O-O {[%emt 0:00:16]} 15. Nf3 {[%emt 0:00:07]} g5 {[%emt 0:00:45]} 16. fxg5 {[%emt 0:00:05]} hxg5 {[%emt 0:00:02]} 17. Qxg5 { [%emt 0:00:01]} Ne4 {[%emt 0:00:36]} 18. Nxe4 {[%emt 0:00:46]} (18. Qg4 Bxg3 19. hxg3) 18... dxe4 {[%emt 0:00:01]} 19. Ne5 {[%emt 0:00:02]} Nxe5 {[%emt 0: 00:03]} 20. dxe5 {[%emt 0:00:03]} Bc5+ {[%emt 0:00:01]} 21. Be3 {[%emt 0:00:04] } Qd2 $1 {[%emt 0:00:33]} 22. Rae1 {[%emt 0:01:46]} Rd3 {[%emt 0:00:53]} 23. Qxg7 {[%emt 0:00:18]} Bxe3+ {[%emt 0:00:04]} 24. Kh1 {[%emt 0:00:01]} Rdd8 { [%emt 0:01:09]} 25. Qg4 {[%emt 0:00:46]} Kb8 {[%emt 0:00:22]} 26. Qxe4 { [%emt 0:00:15]} Bb6 {[%emt 0:00:12]} 27. Rf6 {[%emt 0:00:48]} Rde8 {[%emt 0:00: 07]} 28. Rf7 {[%emt 0:00:49]} Rxh2+ {[%emt 0:00:02]} 29. Kxh2 {[%emt 0:00:03]} Qh6+ {[%emt 0:00:01]} 30. Kg3 {[%emt 0:00:08]} Rg8+ {[%emt 0:00:01]} 31. Kf3 { [%emt 0:00:31]} Qh5+ {[%emt 0:00:01]} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "2.8"] [White "Mammadzada, Gunay"] [Black "Praggnanandhaa R"] [Result "0-1"] [ECO "B56"] [WhiteElo "2443"] [BlackElo "2608"] [Annotator "Shahid"] [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 15,98,30,26,31,46,41,59,57,36,48,59,37,103,102,103,104,100,102,97,97, 138,137,137,0,39,8,50,-10,39,33,23,0,50,-16,0,0,21,0,115,0,60,30,79,0,4,-58, -66,-52,-38,-93,-89,-102,0,0,29,36,83,-10,122,106,120,117,111,93,101,95,103,0, 84,-53,54,0,10,0,91,-367,-353,-29979,-29979,-29978,-29979,-29979,-29957,-2399, -2207]} 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. f3 e5 7. Nb3 Be7 8. Be3 Be6 9. Qe2 {9.Nd5 is becoming the main line. B56: Classical Sicilian: Unusual Lines.} a5 10. O-O-O a4 {[#]} 11. Nc5 {[%mdl 64] Pin. White is slightly better.} a3 {[#]} 12. b3 O-O 13. N5a4 {[#]} ({Avoid the trap} 13. Nxb7 $2 Qb8 $19) 13... Bd7 $146 (13... Nb4 $14) ({Predecessor:} 13... Nb4 14. Bc5 d5 15. exd5 Bxc5 16. dxe6 Bd4 17. exf7+ Rxf7 18. Qc4 Nxa2+ 19. Nxa2 Bb2+ 20. Nxb2 axb2+ 21. Kxb2 Qxd1 22. Qxf7+ Kxf7 {1/2-1/2 (37) Vuckovic,M (2034) -Pobor,D (1931) Pljevlja 2018}) 14. Qd2 $16 Nd4 15. Bxd4 exd4 16. Qxd4 Bxa4 17. Nxa4 Qa5 18. Nb6 $1 Rad8 19. Nc4 (19. b4 $16 Qg5+ 20. Kb1) 19... Qc7 $14 { White should prevent ...d5.} 20. Qb6 Qc8 {And now ...d5 would win.} (20... Qb8 $5 {[%CAl Rd6d5]} 21. Nxa3 d5 $11) 21. Qb4 (21. Nxa3 $14 d5 22. Nb5) 21... Qc7 22. Qa5 ({Don't go for} 22. Qxa3 $2 d5 $19) 22... Qc6 23. Qb6 Qc8 $1 24. Qb4 ( 24. Nxa3 $14 d5 25. Nb5) 24... Qe6 {...d5 is the strong threat.} 25. Qb6 $1 ({ Much worse is} 25. Qxb7 d5 $17) 25... Nd7 26. Qe3 Nc5 (26... Nf6 $1 $11) 27. Nxa3 (27. Nb6 $16) 27... d5 (27... Ra8 $1 $11 28. Bc4 Qe5) 28. Kb1 Nxe4 { White must now prevent ...Bc5.} 29. fxe4 (29. Nb5 $16 Bc5 30. Rd4 $1) 29... Bxa3 $11 30. Bb5 (30. Qd4 $11) 30... dxe4 $15 {Threatens to win with ...Qe5.} 31. c3 Qe5 32. Bc4 (32. Be2 $15) 32... b5 $17 33. Be2 Bc5 ({Black should try} 33... b4 $17 34. Qg3 Qe6 35. Rxd8 Rxd8) 34. Qg3 $11 Qe7 35. Bxb5 e3 {[#]} 36. Qf3 ({White should play} 36. Rhe1 $1 $16) 36... Rxd1+ (36... Qe5 $1 $11) 37. Rxd1 $16 Qe5 38. Kc2 Be7 39. Rd5 Qe6 40. Bd3 Bf6 41. c4 (41. Qf5 $16 {[%csl Gd3][%CAl Rf5h7]} g6 42. Qxe6 fxe6 43. Rd6) 41... Re8 {[#]} (41... Qb6 $11 { keeps the balance.}) 42. Be2 (42. c5 $1 $16) 42... h6 (42... Qa6) 43. Qf5 (43. b4 $14) 43... Qb6 44. Qd7 Rf8 (44... Ra8 $11 45. a3 Qb8) 45. c5 $2 {[%mdl 8192] Now White is beyond hope.} (45. a3 $16 {keeps the pressure on.}) (45. Qd6) 45... Qa5 46. Qa4 (46. Kd1 $19 Qc3 47. Bb5 Qa1+ 48. Ke2 Qxa2+ 49. Kxe3 Qxg2 50. c6 Bg5+ 51. Kd4 Qg1+ 52. Kd3 Qd1+ 53. Kc4 Qc1+ 54. Kb4 Qe1+ 55. Kc4 Qe4+ 56. Rd4 Qe2+ {[%mdl 64] Double Attack} 57. Kb4 Qe1+ 58. Kc4 Qc1+ 59. Kb4) 46... Qc3+ 47. Kd1 Qa1+ 48. Kc2 Qb2+ 49. Kd3 Qd2+ {Weighted Error Value: White=0.55/ Black=0.33} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "2.9"] [White "Nihal Sarin"] [Black "Yip, Carissa"] [Result "1-0"] [ECO "B06"] [WhiteElo "2620"] [BlackElo "2430"] [Annotator "TA"] [PlyCount "77"] [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 9,77,50,43,34,45,31,31,30,38,16,28,16,57,42,90,45,83,66,90,90,94,96,108, 104,100,58,129,81,159,168,177,185,235,240,252,239,314,204,259,284,286,260,298, 298,285,291,848,858,1245,734,715,712,873,866,977,975,1058,956,967,918,2350, 1998,29981,29982,29987,29988,29988,29989,29989,29990]} 1. Nf3 g6 2. e4 Bg7 3. d4 d6 4. Bc4 e6 5. O-O Ne7 6. Nbd2 {B06: Modern Defence.} a6 7. c3 Nd7 8. Re1 { White is slightly better.} O-O 9. Bd3 $5 {[%mdl 4] Exploring less charted territory.} e5 10. Nf1 {[#]} c6 $146 ({Predecessor:} 10... b5 11. a4 b4 12. Be3 exd4 13. cxd4 c5 14. Bf4 Qb6 15. Ne3 cxd4 16. Nc4 Qa7 17. Bxd6 Nc5 {1-0 (40) Van den Doel,E (2610)-Vedrickas,T (2390) Prague 2019}) 11. Ng3 h6 12. h3 Qc7 13. a4 Rd8 14. Qe2 b6 15. Be3 Bb7 16. dxe5 dxe5 17. b4 b5 (17... c5 $14) 18. c4 {[%CAl Ra4b5]} bxc4 ({Black should try} 18... bxa4 19. c5 (19. Rxa4 c5 $11) 19... a5) 19. Bxc4 $16 a5 20. bxa5 Qxa5 21. Qa2 Rf8 22. Red1 Rad8 23. Bd2 Qa8 24. a5 Ba6 25. Be3 c5 26. Rd6 Bxc4 27. Qxc4 Nc6 $2 (27... Rfe8 28. a6 Nf8) 28. Rxg6 $18 Nxa5 {[#]} 29. Rxg7+ $1 {[%mdl 512]} Kxg7 30. Qc3 Rfe8 31. Rxa5 { [%mdl 64] Double Attack} Qc6 32. Nf5+ Kh7 33. Nxh6 Rf8 34. Nxe5 Qf6 35. Nhg4 Qh8 36. Ra6 {White mates.} Kg8 37. Nh6+ Kh7 38. Nhxf7 {[%mdl 64] [#] Double Attack} Nxe5 39. Rh6+ {Weighted Error Value: White=0.17/Black=0.52} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "2.10"] [White "Badelka, Olga"] [Black "Lei, Tingjie"] [Result "0-1"] [ECO "D02"] [WhiteElo "2433"] [BlackElo "2505"] [Annotator "ChessBase"] [PlyCount "76"] [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"] 1. d4 {[%emt 0:00:00]} d5 {[%emt 0:00:00]} 2. Nf3 {[%emt 0:00:00]} Nf6 { [%emt 0:00:00]} 3. Bf4 {[%emt 0:00:01]} e6 {[%emt 0:00:21]} 4. e3 {[%emt 0:00: 07]} Bd6 {[%emt 0:00:01]} 5. Bg3 {[%emt 0:00:05]} c5 {[%emt 0:00:13]} 6. Nbd2 { [%emt 0:00:13]} Qb6 {[%emt 0:01:17]} 7. Bxd6 {[%emt 0:01:17]} Qxd6 {[%emt 0:00: 03]} 8. dxc5 {[%emt 0:00:02]} Qxc5 {[%emt 0:00:02]} 9. c4 {[%emt 0:00:03]} Nc6 {[%emt 0:00:42]} 10. Rc1 {[%emt 0:00:07]} d4 {[%emt 0:01:14]} 11. exd4 { [%emt 0:00:29]} Nxd4 {[%emt 0:00:03]} 12. a3 {[%emt 0:00:41]} O-O {[%emt 0:01: 14]} 13. b4 {[%emt 0:00:08]} Nxf3+ {[%emt 0:00:03]} 14. Nxf3 {[%emt 0:00:21]} Qe7 {[%emt 0:00:05]} 15. c5 {[%emt 0:01:42]} e5 {[%emt 0:03:09]} 16. Bc4 { [%emt 0:00:03]} e4 {[%emt 0:00:06]} 17. Ng5 {[%emt 0:01:22]} h6 {[%emt 0:00:31] } 18. Nxf7 {[%emt 0:00:26]} Rxf7 {[%emt 0:00:06]} 19. Bxf7+ {[%emt 0:00:06]} Qxf7 {[%emt 0:00:05]} 20. Qd8+ {[%emt 0:00:20]} Kh7 {[%emt 0:00:03]} 21. O-O { [%emt 0:00:25]} Qg6 {[%emt 0:00:08]} 22. Qd6 {[%emt 0:01:12]} Bd7 {[%emt 0:00: 07]} 23. Rc3 {[%emt 0:00:10]} Bb5 {[%emt 0:00:21]} 24. Rg3 {[%emt 0:00:17]} Qf7 {[%emt 0:00:02]} 25. Rd1 {[%emt 0:00:35]} Nh5 {[%emt 0:00:19]} 26. Re3 { [%emt 0:00:20]} Rf8 {[%emt 0:00:58]} 27. Qd2 {[%emt 0:00:03]} Nf4 {[%emt 0:00: 15]} 28. f3 {[%emt 0:00:55]} exf3 {[%emt 0:00:16]} 29. Rxf3 {[%emt 0:00:01]} Bc6 {[%emt 0:00:01]} 30. Rg3 {[%emt 0:00:04]} Be4 {[%emt 0:00:32]} 31. Re1 { [%emt 0:00:09]} Qf5 {[%emt 0:00:09]} 32. Qe3 {[%emt 0:00:28]} Bc6 {[%emt 0:00: 05]} 33. Qd2 {[%emt 0:00:16]} Rf6 {[%emt 0:00:02]} 34. h3 {[%emt 0:00:06]} Nxg2 {[%emt 0:00:07]} 35. Rxg2 {[%emt 0:00:07]} Bxg2 {[%emt 0:00:01]} 36. Kxg2 { [%emt 0:00:02]} Rg6+ {[%emt 0:00:04]} 37. Kh2 {[%emt 0:00:02]} Qf3 {[%emt 0:00: 05]} 38. Re3 {[%emt 0:00:20]} Qf4+ {[%emt 0:00:02]} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "3.1"] [White "Lei, Tingjie"] [Black "Zhu, Jiner"] [Result "1-0"] [ECO "A18"] [WhiteElo "2505"] [BlackElo "2459"] [Annotator "Shahid"] [PlyCount "43"] [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 0,43,20,-21,4,-27,4,2,2,2,8,13,76,51,51,29,4,34,17,17,26,26,38,31,69,29, 37,34,34,59,59,59,59,-25,-26,-32,335,377,349,395,395,416,444,454,710,722]} 1. c4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 2. Nc3 {[%emt 0:00:00]} e6 {[%emt 0: 00:00]} 3. e4 {[%emt 0:00:00]} d5 {[%emt 0:00:00]} 4. cxd5 {[%emt 0:00:00]} exd5 {[%emt 0:00:00]} 5. e5 {[%emt 0:00:00]} d4 {[%emt 0:00:34]} 6. exf6 { [%emt 0:00:01]} dxc3 {[%emt 0:00:03]} 7. Bb5+ {[%emt 0:00:01]} c6 {[%emt 0:00: 01]} 8. Qe2+ {[%emt 0:00:03]} Be6 {[%emt 0:00:03]} 9. Bc4 {[%emt 0:00:01]} cxd2+ {[%emt 0:00:05]} 10. Bxd2 {[%emt 0:00:02]} Qxf6 {[%emt 0:00:05]} 11. Nf3 {[%emt 0:00:05]} Be7 {[%emt 0:01:08]} 12. O-O-O {[%emt 0:00:05]} h6 {[%emt 0: 01:02]} 13. Rhe1 {[%emt 0:00:03]} O-O {[%emt 0:00:36]} 14. Bxe6 {[%emt 0:00:05] } Qxe6 {[%emt 0:00:12]} 15. Qd3 {[%emt 0:03:25]} Qd6 {[%emt 0:02:36]} 16. Qe4 { [%emt 0:00:05]} Qc5+ {[%emt 0:00:10]} 17. Kb1 {[%emt 0:00:09]} Bd6 $4 {[%emt 0: 00:44]} (17... Bf6) 18. Be3 {[%emt 0:00:34]} Qb4 {[%emt 0:02:10]} 19. Rd4 { [%emt 0:00:03]} Qc5 {[%emt 0:00:12]} 20. Rc1 {[%emt 0:01:38]} Qa5 {[%emt 0:00: 11]} 21. Rxd6 {[%emt 0:00:04]} Na6 {[%emt 0:00:31]} 22. Bxh6 {[%emt 0:02:14]} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "3.2"] [White "Yip, Carissa"] [Black "Badelka, Olga"] [Result "1-0"] [ECO "B01"] [WhiteElo "2430"] [BlackElo "2433"] [Annotator "NA"] [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"] 1. e4 {[%emt 0:00:00]} d5 {[%emt 0:00:00]} 2. exd5 {[%emt 0:00:00]} Qxd5 { [%emt 0:00:00]} 3. Nc3 {[%emt 0:00:06]} Qd6 {[%emt 0:00:00]} 4. d4 {[%emt 0:00: 06]} Nf6 {[%emt 0:00:00]} 5. Nb5 {[%emt 0:00:27]} Qd8 {[%emt 0:00:37]} 6. c4 { [%emt 0:00:09]} c6 {[%emt 0:01:28]} 7. Nc3 {[%emt 0:00:02]} Bg4 {[%emt 0:02:30] } 8. Qb3 {[%emt 0:00:31]} Qb6 {[%emt 0:00:21]} 9. h3 {[%emt 0:00:14]} Bh5 { [%emt 0:00:11]} 10. c5 {[%emt 0:00:30]} Qxb3 {[%emt 0:00:16]} 11. axb3 { [%emt 0:00:01]} Nbd7 {[%emt 0:00:18]} 12. b4 {[%emt 0:00:03]} e5 {[%emt 0:00: 13]} 13. dxe5 {[%emt 0:00:05]} Nxe5 {[%emt 0:00:02]} 14. f4 {[%emt 0:00:07]} Ned7 {[%emt 0:00:33]} 15. g4 {[%emt 0:00:01]} Nxg4 {[%emt 0:00:02]} 16. hxg4 { [%emt 0:00:01]} Bxg4 {[%emt 0:00:01]} 17. Bh3 {[%emt 0:00:20]} f5 {[%emt 0:00: 15]} 18. Kf2 {[%emt 0:00:51]} Nf6 {[%emt 0:00:14]} 19. Bg2 {[%emt 0:00:18]} a6 {[%emt 0:00:26]} 20. Nf3 {[%emt 0:00:12]} O-O-O {[%emt 0:00:16]} 21. Be3 { [%emt 0:00:27]} Bxf3 {[%emt 0:00:28]} 22. Bxf3 {[%emt 0:00:03]} Be7 {[%emt 0: 00:18]} 23. Rhd1 {[%emt 0:00:07]} h5 {[%emt 0:00:32]} 24. Rxd8+ {[%emt 0:00:39] } Bxd8 {[%emt 0:00:08]} 25. Rh1 {[%emt 0:00:23]} h4 {[%emt 0:00:17]} 26. Bd4 { [%emt 0:00:45]} Rh7 {[%emt 0:00:52]} 27. Be5 {[%emt 0:00:35]} Nd7 {[%emt 0:00: 48]} 28. Bd6 {[%emt 0:00:30]} Bf6 {[%emt 0:00:16]} 29. Be2 {[%emt 0:00:20]} Bd4+ {[%emt 0:00:16]} 30. Kf3 {[%emt 0:00:25]} Nf6 {[%emt 0:00:07]} 31. Bc4 { [%emt 0:00:04]} Kd7 {[%emt 0:00:23]} 32. Re1 {[%emt 0:00:03]} h3 {[%emt 0:00: 09]} 33. Be6+ {[%emt 0:00:04]} Kd8 {[%emt 0:00:03]} 34. Bxf5 {[%emt 0:00:39]} Rh5 {[%emt 0:00:02]} 35. Be7+ {[%emt 0:00:56]} Kc7 {[%emt 0:00:05]} 36. Bxf6 { [%emt 0:00:19]} Bxf6 {[%emt 0:00:01]} 37. Bg4 {[%emt 0:00:03]} Rh8 {[%emt 0:00: 05]} 38. Rh1 {[%emt 0:00:17]} h2 {[%emt 0:00:03]} 39. Kg2 {[%emt 0:00:08]} Rh4 {[%emt 0:00:13]} 40. Kg3 {[%emt 0:00:11]} b6 {[%emt 0:00:19]} 41. Ne4 {[%emt 0: 00:29]} Be7 {[%emt 0:00:04]} 42. Rxh2 {[%emt 0:00:03]} Rxh2 {[%emt 0:00:02]} 43. Kxh2 {[%emt 0:00:00]} a5 {[%emt 0:00:02]} 44. cxb6+ {[%emt 0:00:19]} Kxb6 { [%emt 0:00:02]} 45. bxa5+ {[%emt 0:00:01]} Kxa5 {[%emt 0:00:01]} 46. Be6 { [%emt 0:00:04]} Kb4 {[%emt 0:00:05]} 47. Kg3 {[%emt 0:00:03]} c5 {[%emt 0:00: 11]} 48. b3 {[%emt 0:00:02]} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "3.3"] [White "Praggnanandhaa R"] [Black "Nihal Sarin"] [Result "1-0"] [ECO "D37"] [WhiteElo "2608"] [BlackElo "2620"] [Annotator "Shahid"] [PlyCount "121"] [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 9,121,26,25,25,45,43,37,40,37,41,41,35,43,27,27,27,20,15,23,26,34,33,29, 29,31,28,15,16,19,8,24,22,34,42,76,87,74,64,124,121,121,118,119,120,118,117, 133,133,133,119,113,127,104,107,113,113,113,109,364,272,133,65,651,692,683,672, 515,394,2182,1945,5923,12817,29955,29959,29955,6422,29969,29969,29969,29971, 29971,29970,29970,29970,29969,29967,29965,29960,29976,29969,29970,29971,29971, 29973,29981,29982,29982,29983,29985,29986,29986,29984,29982,29983,29983,29984, 29985,29985,29985,29986,29986,29985,29987,29988]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Nbd7 5. Bf4 dxc4 6. e3 {D37: Queen's Gambit Declined: 5 Bf4.} b5 7. Nxb5 Bb4+ 8. Nc3 {White is slightly better.} Nd5 9. a3 ({Reject} 9. Bxc4 Nxc3 10. bxc3 Bxc3+ 11. Ke2 Bxa1 $15) 9... Nxc3 10. Qd2 {[%mdl 64] Pin} Bxa3 {[#] ... Ne4 is the strong threat.} 11. bxc3 $1 $146 {[%mdl 8] An important novelty.} ({ Inferior is} 11. Rxa3 Nb1 $17) ({Predecessor:} 11. Qxc3 Bd6 12. Bxd6 cxd6 13. Bxc4 O-O 14. d5 e5 15. O-O a5 16. Nd2 Bb7 17. b3 {1-0 (37) Giri,A (2764) -Kramnik,V (2753) chess24.com INT 2020}) 11... Bd6 12. Bxd6 cxd6 13. Bxc4 O-O 14. O-O Bb7 15. Be2 Qc7 16. c4 a5 17. Rfc1 h6 18. Qc3 Rfc8 19. Nd2 e5 20. Bg4 exd4 21. exd4 Re8 22. Bxd7 Qxd7 23. Rxa5 Bxg2 $2 24. Kxg2 $16 {aiming for Rxa8. } Rxa5 25. Qxa5 {Strongly threatening Qh5.} Qg4+ 26. Kh1 Qxd4 27. Qd5 Qxf2 28. Rf1 ({Weaker is} 28. Qxd6 Re2 $15) 28... Re1 29. Qa8+ (29. Rxe1 Qxe1+ 30. Kg2) 29... Kh7 {[#]} 30. Qe4+ $1 {[%mdl 512]} Rxe4 31. Rxf2 {[%mdl 4096] Endgame KRN-KR} Rd4 32. Kg2 f5 33. Kf3 {And now Ke3 would win.} f4 {[%mdl 8192]} (33... Rh4 $16 34. Ke2 Kg6) 34. Ke2 $18 g5 35. Kd1 ({White should play} 35. h3 $16) 35... Kg6 $2 {[%mdl 8192] [#]} (35... Rd3 $14) 36. Kc2 $1 f3 (36... g4 $4 37. Kc3 g3 38. Rg2) 37. Rxf3 Rh4 38. h3 g4 $2 (38... h5 39. Kd3 g4 40. hxg4 Rxg4) 39. hxg4 Rxg4 40. Rd3 h5 41. Rxd6+ Kf7 42. Kd3 h4 43. Nf3 {White mates.} Rg3 44. Ke3 h3 45. Rh6 Kg7 46. Rh4 Kf6 47. Kf4 Rg8 48. Rxh3 Ke6 49. Ke4 Kd6 50. Kd3 Kc5 51. Rh5+ Kb4 52. Rb5+ Ka4 53. Rb1 Rd8+ 54. Nd4 Rc8 55. Kc3 {[%CAl Rb1a1]} Ka5 56. Rb5+ Ka6 57. c5 Rh8 58. Kc4 Rh6 59. Rb1 Rg6 60. Re1 Rh6 61. Re6+ { Weighted Error Value: White=0.06/Black=0.66} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "3.4"] [White "Salimova, Nurgyul"] [Black "Mammadzada, Gunay"] [Result "0-1"] [ECO "D15"] [WhiteElo "2397"] [BlackElo "2443"] [Annotator "Shahid"] [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"] [TimeControl "600+5"] {[%evp 0,66,24,28,28,29,25,18,26,22,57,21,36,22,27,20,30,26,26,26,29,17,26,-15, -3,-6,5,3,6,21,18,25,-46,-25,31,8,14,8,8,-6,2,9,0,-43,-10,-50,-2,-8,18,16,36, 36,63,63,53,-549,-533,-540,-555,-630,-630,-691,-520,-666,-535,-856,-989,-1103, -1105]} 1. d4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 2. Nf3 {[%emt 0:00:01]} d5 {[%emt 0:00:00]} 3. c4 {[%emt 0:00:09]} c6 {[%emt 0:00:02]} 4. Nc3 {[%emt 0:00: 03]} a6 {[%emt 0:00:02]} 5. Qc2 {[%emt 0:00:20]} g6 {[%emt 0:00:08]} 6. e4 { [%emt 0:00:27]} dxe4 {[%emt 0:00:03]} 7. Nxe4 {[%emt 0:00:02]} Nxe4 {[%emt 0: 00:18]} 8. Qxe4 {[%emt 0:00:02]} Bg7 {[%emt 0:00:00]} 9. Be2 {[%emt 0:00:47]} O-O {[%emt 0:00:34]} 10. O-O {[%emt 0:00:13]} Bf5 {[%emt 0:01:07]} 11. Qh4 { [%emt 0:00:28]} Nd7 {[%emt 0:00:38]} 12. Bg5 {[%emt 0:00:19]} Re8 {[%emt 0:00: 47]} 13. Rad1 {[%emt 0:00:36]} Qc7 {[%emt 0:01:45]} 14. Rfe1 {[%emt 0:01:19]} e5 {[%emt 0:01:24]} 15. dxe5 {[%emt 0:00:32]} Nxe5 {[%emt 0:00:02]} 16. Nd4 { [%emt 0:00:09]} Bd7 {[%emt 0:00:14]} 17. Bf6 {[%emt 0:04:51]} c5 {[%emt 0:00: 08]} 18. Bxg7 {[%emt 0:00:11]} Kxg7 {[%emt 0:00:05]} 19. Nc2 {[%emt 0:00:19]} Bc6 {[%emt 0:02:32]} 20. Ne3 {[%emt 0:00:05]} Rad8 {[%emt 0:00:15]} 21. Qg3 { [%emt 0:00:16]} f6 {[%emt 0:00:50]} 22. h4 {[%emt 0:00:05]} Kh8 {[%emt 0:00:23] } 23. h5 {[%emt 0:00:15]} Qg7 {[%emt 0:00:14]} 24. hxg6 {[%emt 0:00:09]} Qxg6 { [%emt 0:00:07]} 25. Qh3 {[%emt 0:00:15]} Rg8 {[%emt 0:00:07]} 26. Rxd8 { [%emt 0:00:03]} Rxd8 {[%emt 0:00:04]} 27. Bf1 $4 {[%emt 0:00:07]} (27. f4 Nd3 28. Rd1) 27... Nf3+ {[%emt 0:00:03]} 28. Kh1 {[%emt 0:00:01]} Nxe1 {[%emt 0:00: 01]} 29. Qe6 {[%emt 0:00:06]} Re8 {[%emt 0:00:07]} 30. Qd6 {[%emt 0:00:03]} Kg7 {[%emt 0:00:04]} 31. Qc7+ {[%emt 0:00:03]} Kg8 {[%emt 0:00:03]} 32. Qh2 { [%emt 0:00:16]} Re5 {[%emt 0:00:11]} 33. Be2 {[%emt 0:00:09]} Nxg2 {[%emt 0:00: 12]} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "3.5"] [White "Saduakassova, Dinara"] [Black "Murzin, Volodar"] [Result "1/2-1/2"] [ECO "E68"] [WhiteElo "2500"] [BlackElo "2478"] [Annotator "Shahid"] [PlyCount "172"] [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 0,172,28,28,29,7,43,25,18,21,10,21,24,32,32,27,49,7,40,-1,29,39,31,-1, 46,61,85,54,54,18,20,41,43,48,58,30,10,11,19,31,31,32,92,73,71,55,59,37,38,27, 44,33,29,10,-2,-6,-13,-6,-7,-7,-15,-9,0,-4,0,0,0,0,-4,0,0,0,34,59,59,39,96,27, 53,12,6,-7,-13,-6,0,-23,-27,-27,-27,-23,-24,-23,-20,-9,-7,-15,-12,-12,8,-10,8, -15,0,0,7,0,0,-5,0,0,0,0,556,-6,8,-29,5,-29,65,5,5,5,1,8,8,6,6,6,5,1,1,1,1,1,4, 4,80,4,5,1,1,3,3,3,3,3,3,5,5,3,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,0,5,5,5,5, 5]} 1. d4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 2. c4 {[%emt 0:00:00]} g6 { [%emt 0:00:00]} 3. g3 {[%emt 0:00:00]} Bg7 {[%emt 0:00:01]} 4. Bg2 {[%emt 0:00: 00]} O-O {[%emt 0:00:01]} 5. Nc3 {[%emt 0:00:01]} d6 {[%emt 0:00:01]} 6. Nf3 { [%emt 0:00:01]} Nbd7 {[%emt 0:00:02]} 7. O-O {[%emt 0:00:01]} e5 {[%emt 0:00: 01]} 8. e4 {[%emt 0:00:02]} a6 {[%emt 0:00:07]} 9. h3 {[%emt 0:00:23]} b5 { [%emt 0:00:03]} 10. dxe5 {[%emt 0:00:02]} dxe5 {[%emt 0:00:05]} 11. Be3 { [%emt 0:00:20]} b4 {[%emt 0:01:10]} 12. Nd5 {[%emt 0:00:50]} Rb8 {[%emt 0:00: 38]} 13. Nxf6+ {[%emt 0:00:46]} Qxf6 {[%emt 0:00:05]} 14. Qd2 {[%emt 0:00:17]} Qe7 {[%emt 0:00:45]} 15. Rfd1 {[%emt 0:00:32]} Nc5 {[%emt 0:00:08]} 16. Qd5 { [%emt 0:02:12]} Na4 {[%emt 0:00:08]} 17. Rab1 {[%emt 0:02:20]} Nb6 {[%emt 0:05: 18]} 18. Qc5 {[%emt 0:00:22]} Qxc5 {[%emt 0:00:15]} 19. Bxc5 {[%emt 0:00:02]} Re8 {[%emt 0:00:01]} 20. b3 {[%emt 0:00:55]} Bf8 {[%emt 0:00:05]} 21. Bxf8 { [%emt 0:00:32]} Kxf8 {[%emt 0:00:00]} 22. Ne1 {[%emt 0:00:01]} a5 {[%emt 0:00: 32]} 23. Nd3 {[%emt 0:00:02]} Nd7 {[%emt 0:00:02]} 24. h4 {[%emt 0:00:05]} Ke7 {[%emt 0:00:07]} 25. Bh3 {[%emt 0:00:05]} f6 {[%emt 0:00:01]} 26. Bxd7 { [%emt 0:00:08]} Bxd7 {[%emt 0:00:04]} 27. Nc5 {[%emt 0:00:01]} Bc6 {[%emt 0:00: 01]} 28. f3 {[%emt 0:00:03]} Red8 {[%emt 0:00:13]} 29. Kf2 {[%emt 0:00:02]} Rd6 {[%emt 0:00:15]} 30. Ke3 {[%emt 0:00:06]} Rbd8 {[%emt 0:00:08]} 31. Rd3 { [%emt 0:00:02]} f5 {[%emt 0:00:33]} 32. Rbd1 {[%emt 0:00:17]} h5 {[%emt 0:00: 59]} 33. R1d2 {[%emt 0:00:25]} Rf8 {[%emt 0:00:11]} 34. Rd1 {[%emt 0:01:10]} Ra8 {[%emt 0:00:25]} 35. R1d2 {[%emt 0:00:14]} a4 {[%emt 0:00:11]} 36. Rxd6 { [%emt 0:00:12]} cxd6 {[%emt 0:00:01]} 37. Nd3 {[%emt 0:00:00]} Rb8 {[%emt 0:00: 10]} 38. bxa4 {[%emt 0:00:05]} Bxa4 {[%emt 0:00:01]} 39. Rb2 {[%emt 0:00:02]} b3 {[%emt 0:00:05]} 40. axb3 {[%emt 0:00:01]} Rxb3 {[%emt 0:00:05]} 41. Rxb3 { [%emt 0:00:01]} Bxb3 {[%emt 0:00:01]} 42. exf5 {[%emt 0:00:07]} gxf5 {[%emt 0: 00:19]} 43. c5 {[%emt 0:00:03]} Bc4 {[%emt 0:00:02]} 44. cxd6+ {[%emt 0:00:02]} Kxd6 {[%emt 0:00:00]} 45. Nf2 {[%emt 0:00:01]} Ke6 {[%emt 0:00:01]} 46. Nd1 { [%emt 0:00:02]} Bb3 {[%emt 0:00:06]} 47. Nc3 {[%emt 0:00:02]} Bc4 {[%emt 0:00: 01]} 48. f4 {[%emt 0:00:01]} Kf6 {[%emt 0:00:03]} 49. Na4 {[%emt 0:00:03]} Ke6 {[%emt 0:00:12]} 50. Nc5+ {[%emt 0:00:08]} Kd6 {[%emt 0:00:01]} 51. Nb7+ { [%emt 0:00:04]} Ke6 {[%emt 0:00:19]} 52. Nc5+ {[%emt 0:00:07]} Kd6 {[%emt 0:00: 02]} 53. Na4 {[%emt 0:00:01]} Ke6 {[%emt 0:00:02]} 54. Nb2 {[%emt 0:00:02]} Bb5 {[%emt 0:00:02]} 55. Nd1 {[%emt 0:00:01]} Kd5 $4 {[%emt 0:00:03]} (55... Bc4) 56. Nf2 {[%emt 0:00:03]} (56. Nc3+ $18) 56... Ke6 {[%emt 0:00:09]} 57. Nh3 { [%emt 0:00:02]} Kd5 {[%emt 0:00:07]} 58. Ng5 {[%emt 0:00:02]} Bd7 {[%emt 0:00: 12]} 59. fxe5 {[%emt 0:00:06]} Kxe5 {[%emt 0:00:01]} 60. Nf3+ {[%emt 0:00:01]} Kf6 {[%emt 0:00:01]} 61. Kf4 {[%emt 0:00:09]} Bc8 {[%emt 0:00:01]} 62. Nd4 { [%emt 0:00:02]} Bd7 {[%emt 0:00:01]} 63. Nc2 {[%emt 0:00:01]} Bc8 {[%emt 0:00: 02]} 64. Ne3 {[%emt 0:00:01]} Be6 {[%emt 0:00:01]} 65. Nf1 {[%emt 0:00:06]} Bd7 {[%emt 0:00:07]} 66. Nd2 {[%emt 0:00:02]} Bc8 {[%emt 0:00:02]} 67. Nc4 { [%emt 0:00:05]} Bd7 {[%emt 0:00:06]} 68. Ke3 {[%emt 0:00:10]} Be6 {[%emt 0:00: 03]} 69. Nd2 {[%emt 0:00:02]} Bd5 {[%emt 0:00:11]} 70. Kf4 {[%emt 0:00:03]} Be6 {[%emt 0:00:03]} 71. Nf3 {[%emt 0:00:02]} Bc8 {[%emt 0:00:04]} 72. Nd4 { [%emt 0:00:01]} Bd7 {[%emt 0:00:02]} 73. Ke3 {[%emt 0:00:01]} Ke5 {[%emt 0:00: 02]} 74. Ne2 {[%emt 0:00:01]} Be8 {[%emt 0:00:08]} 75. Nf4 {[%emt 0:00:03]} Bf7 {[%emt 0:00:02]} 76. Kd3 {[%emt 0:00:03]} Be8 {[%emt 0:00:03]} 77. Ke3 { [%emt 0:00:02]} Bf7 {[%emt 0:00:02]} 78. Nd3+ {[%emt 0:00:01]} Kf6 {[%emt 0:00: 00]} 79. Kd4 {[%emt 0:00:00]} Be6 {[%emt 0:00:20]} 80. Nf4 {[%emt 0:00:05]} Bf7 {[%emt 0:00:02]} 81. Nh3 {[%emt 0:00:44]} Be6 {[%emt 0:00:09]} 82. Ng5 { [%emt 0:00:06]} Bg8 {[%emt 0:00:09]} 83. Ke3 {[%emt 0:00:01]} Bd5 {[%emt 0:00: 03]} 84. Kf4 {[%emt 0:00:01]} Bc6 {[%emt 0:00:05]} 85. Nh7+ {[%emt 0:00:03]} Kg6 {[%emt 0:00:01]} 86. Ng5 {[%emt 0:00:18]} Kf6 {[%emt 0:00:02]} 1/2-1/2 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "3.6"] [White "Liang, Awonder"] [Black "Abdusattorov, Nodirbek"] [Result "1/2-1/2"] [ECO "A17"] [WhiteElo "2592"] [BlackElo "2627"] [Annotator "TA"] [PlyCount "120"] [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 17,120,41,38,22,31,0,3,0,12,-10,29,28,29,29,35,4,16,0,30,0,3,-14,-11, -19,-18,-58,-41,-52,-24,-22,0,-35,-32,-59,-4,-18,0,0,12,15,12,1,1,0,2,8,16,14, 30,-36,-31,-37,-29,-54,-27,-58,-27,-31,-10,-71,-81,-106,-48,-46,-7,-14,-7,0,0, 0,25,13,12,0,0,0,0,0,19,0,0,0,0,0,0,0,0,0,8,8,8,8,8,0,0,-8,-8,-8,-8,-8,8,8,8, -8,-8]} 1. Nf3 {Hjartarson,J} Nf6 2. g3 b6 3. Bg2 Bb7 4. O-O e6 5. c4 Be7 6. Nc3 O-O 7. Re1 Ne4 8. Nxe4 Bxe4 9. d3 Bb7 10. d4 {A17: English Opening: 1... Nf6 with ...Bb4.} Be4 11. Bf4 {[#]} d6 $146 ({Predecessor:} 11... Bf6 12. Qd2 d6 13. Rad1 Nd7 14. Qe3 d5 15. b4 c6 16. Rc1 b5 17. cxb5 cxb5 {1/2-1/2 (27) Hjartarson,J (2570)-Stefansson,H (2520) Reykjavik 1995 CBM 051 [Hjartarson,J]}) 12. h4 Nd7 13. Qd2 Bf6 14. Rad1 Qe7 15. Qe3 Bb7 16. Qa3 Be4 17. Qe3 Bb7 18. Qa3 Be4 19. d5 e5 20. Bc1 a5 21. Qe3 Bc2 22. Rd2 Bb1 23. b3 Nc5 24. Ba3 Bf5 25. Ng5 Bxg5 (25... e4 $15) 26. Qxg5 $11 Qxg5 27. hxg5 Ne4 28. Bxe4 Bxe4 29. Bb2 a4 30. b4 f6 31. f3 Bg6 32. gxf6 gxf6 33. g4 (33. a3 $11) 33... f5 $15 34. gxf5 Rxf5 35. c5 a3 36. Bc3 bxc5 37. bxc5 e4 38. fxe4 (38. cxd6 $11 cxd6 39. Bb4) 38... Rg5+ $17 {[%mdl 64] [#] Discovered Attack} 39. Kf2 Rf8+ ({Don't play} 39... Bxe4 40. cxd6 cxd6 41. Bb4 $11) ({Black should try} 39... dxc5 $17 {( -> ... Rf8+)} 40. Rdd1 Rf8+ 41. Ke3 Rg4) 40. Ke3 $15 Rg3+ (40... dxc5 {keeps more tension.} 41. Kd3 Rxd5+ 42. Kc4 Rxd2 43. Bxd2 Re8) 41. Kd4 Rf4 {[%csl Gg6] [%CAl Rf4e4]} 42. Kc4 Rxe4+ 43. Rd4 h5 (43... dxc5 {is more complex.} 44. Rxe4 Bxe4 45. Ba5 Rg7 46. Kxc5 h5) 44. Rxe4 Bxe4 $11 {[%mdl 4096] Endgame KRB-KRB. The position is equal.} 45. Ba5 (45. cxd6 {is interesting.} cxd6 46. Bb4 Rg6 47. Rf1 Rg5 48. Rd1) 45... Rg7 46. cxd6 cxd6 47. Bb4 Rg6 48. Kd4 Bg2 $1 49. Rg1 Rg4+ 50. Kc3 Bxd5 51. Rxg4+ hxg4 52. Bxa3 {KB-KB} g3 {[#] Strongly threatening ...g2.} 53. Bxd6 g2 54. Bh2 Bxa2 55. Kd2 Kf7 56. Ke1 Ke6 57. Kf2 Bd5 58. e4 g1=Q+ 59. Kxg1 Bxe4 60. Be5 Kxe5 {Weighted Error Value: White=0.15/Black=0.10} 1/2-1/2 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "3.7"] [White "Yoo, Christopher Woojin"] [Black "Khademalsharieh, Sarasadat"] [Result "1-0"] [ECO "C44"] [WhiteElo "2455"] [BlackElo "2494"] [Annotator "ChessBase"] [PlyCount "59"] [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 0,59,28,29,20,14,31,18,13,-47,-40,-67,-58,-33,0,3,12,14,39,13,10,10,23, -27,9,-48,43,44,73,37,31,15,-3,25,25,-12,1,-31,30,-24,-38,-8,52,-30,306,261, 365,365,369,212,210,239,304,272,870,934,1245,1494,1558,1699,29999,-30000]} 1. e4 {[%emt 0:00:00]} e5 {[%emt 0:00:00]} 2. Nf3 {[%emt 0:00:00]} Nc6 {[%emt 0: 00:00]} 3. d4 {[%emt 0:00:05]} exd4 {[%emt 0:00:00]} 4. c3 {[%emt 0:00:02]} d5 {[%emt 0:00:05]} 5. Bd3 {[%emt 0:00:02]} dxc3 {[%emt 0:00:31]} 6. exd5 { [%emt 0:00:03]} Qxd5 {[%emt 0:00:15]} 7. Nxc3 {[%emt 0:02:26]} Bb4 {[%emt 0:00: 10]} 8. O-O {[%emt 0:00:50]} Bxc3 {[%emt 0:00:14]} 9. bxc3 {[%emt 0:00:00]} Bg4 {[%emt 0:00:54]} 10. c4 {[%emt 0:01:05]} Qd6 {[%emt 0:02:24]} 11. Qb3 {[%emt 0: 03:20]} Bxf3 {[%emt 0:00:42]} 12. gxf3 {[%emt 0:00:12]} Nge7 {[%emt 0:02:56]} 13. Ba3 {[%emt 0:00:49]} Qf6 {[%emt 0:00:44]} 14. Qxb7 {[%emt 0:01:02]} O-O { [%emt 0:00:20]} 15. Qxc7 {[%emt 0:00:25]} Rfd8 {[%emt 0:00:30]} 16. Be4 { [%emt 0:00:39]} Rac8 {[%emt 0:00:06]} 17. Qg3 {[%emt 0:00:06]} Nd4 {[%emt 0:00: 03]} 18. Kh1 {[%emt 0:00:06]} Nef5 {[%emt 0:00:05]} 19. Qh3 {[%emt 0:00:06]} Rxc4 {[%emt 0:00:04]} 20. Rad1 {[%emt 0:00:07]} Re8 $4 {[%emt 0:00:16]} (20... Nh4) 21. Bb2 {[%emt 0:00:03]} (21. Rxd4 $1 Rxd4 (21... Nxd4 $4 22. Qxh7#) ( 21... Qxd4 22. Qxf5) 22. Qxf5) 21... Qb6 {[%emt 0:00:17]} 22. Bxd4 {[%emt 0:00: 05]} Nxd4 {[%emt 0:00:05]} 23. Qxh7+ {[%emt 0:00:02]} Kf8 {[%emt 0:00:01]} 24. Qh8+ {[%emt 0:00:01]} Ke7 {[%emt 0:00:01]} 25. Qxg7 {[%emt 0:00:02]} Ne6 { [%emt 0:00:02]} 26. Qh6 {[%emt 0:00:06]} Rcc8 {[%emt 0:00:23]} 27. Qh4+ { [%emt 0:00:04]} Kf8 {[%emt 0:00:02]} 28. Rd7 {[%emt 0:00:02]} Qb2 {[%emt 0:00: 13]} 29. Rg1 {[%emt 0:00:07]} Red8 {[%emt 0:00:10]} 30. Qe7# {[%emt 0:00:03]} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "3.8"] [White "Shuvalova, Polina"] [Black "Abdumalik, Zhansaya"] [Result "1/2-1/2"] [ECO "D80"] [WhiteElo "2476"] [BlackElo "2472"] [Annotator "ChessBase"] [PlyCount "133"] [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"] 1. d4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 2. c4 {[%emt 0:00:00]} g6 {[%emt 0: 00:00]} 3. Nc3 {[%emt 0:00:01]} d5 {[%emt 0:00:00]} 4. Nf3 {[%emt 0:00:01]} Bg7 {[%emt 0:00:00]} 5. Bg5 {[%emt 0:00:01]} Ne4 {[%emt 0:00:27]} 6. Bf4 {[%emt 0: 00:04]} Nxc3 {[%emt 0:00:27]} 7. bxc3 {[%emt 0:00:00]} O-O {[%emt 0:00:08]} 8. e3 {[%emt 0:00:14]} c5 {[%emt 0:00:11]} 9. cxd5 {[%emt 0:00:05]} Qxd5 {[%emt 0: 00:11]} 10. Be2 {[%emt 0:00:02]} cxd4 {[%emt 0:00:29]} 11. cxd4 {[%emt 0:00:01] } Nc6 {[%emt 0:00:04]} 12. O-O {[%emt 0:00:03]} Bf5 {[%emt 0:00:01]} 13. Qa4 { [%emt 0:00:01]} Qa5 {[%emt 0:00:02]} 14. Qxa5 {[%emt 0:00:02]} Nxa5 {[%emt 0: 00:01]} 15. Nd2 {[%emt 0:00:07]} Rac8 {[%emt 0:00:19]} 16. g4 {[%emt 0:00:02]} Be6 {[%emt 0:01:21]} 17. Rfc1 {[%emt 0:00:11]} Rxc1+ {[%emt 0:00:31]} 18. Rxc1 {[%emt 0:00:01]} Rc8 {[%emt 0:00:00]} 19. Rxc8+ {[%emt 0:00:01]} Bxc8 {[%emt 0: 00:01]} 20. d5 {[%emt 0:00:01]} e5 {[%emt 0:00:33]} 21. Bg3 {[%emt 0:00:59]} Kf8 {[%emt 0:00:18]} 22. g5 {[%emt 0:00:57]} Ke7 {[%emt 0:00:06]} 23. e4 { [%emt 0:01:33]} a6 {[%emt 0:00:43]} 24. f3 {[%emt 0:00:18]} b5 {[%emt 0:00:12]} 25. Kf1 {[%emt 0:02:03]} Bh3+ {[%emt 0:00:52]} 26. Ke1 {[%emt 0:00:03]} Kd6 { [%emt 0:00:22]} 27. Bf2 {[%emt 0:00:52]} h6 {[%emt 0:00:10]} 28. Be3 {[%emt 0: 01:04]} hxg5 {[%emt 0:00:07]} 29. Bxg5 {[%emt 0:00:00]} Nb7 {[%emt 0:00:23]} 30. Nb3 {[%emt 0:00:08]} f6 {[%emt 0:00:33]} 31. Be3 {[%emt 0:00:02]} f5 { [%emt 0:00:05]} 32. Kd2 {[%emt 0:00:53]} f4 {[%emt 0:00:13]} 33. Ba7 {[%emt 0: 00:14]} Kc7 {[%emt 0:00:19]} 34. Kc3 {[%emt 0:00:10]} Bf8 {[%emt 0:00:05]} 35. Bf2 {[%emt 0:00:38]} Be7 {[%emt 0:00:13]} 36. Kc2 {[%emt 0:00:25]} g5 {[%emt 0: 00:07]} 37. Kc3 {[%emt 0:00:04]} Bd7 {[%emt 0:00:06]} 38. Nc1 {[%emt 0:00:14]} Nc5 {[%emt 0:00:47]} 39. Nd3 {[%emt 0:00:21]} Nxd3 {[%emt 0:00:16]} 40. Kxd3 { [%emt 0:00:10]} a5 {[%emt 0:00:12]} 41. Be1 {[%emt 0:00:25]} Kb6 {[%emt 0:00: 04]} 42. Bc3 {[%emt 0:00:16]} Bd6 {[%emt 0:00:07]} 43. Kc2 {[%emt 0:00:15]} Bc8 {[%emt 0:00:11]} 44. Kb3 {[%emt 0:00:18]} Ba6 {[%emt 0:00:40]} 45. Be1 { [%emt 0:00:19]} a4+ {[%emt 0:00:28]} 46. Kb2 {[%emt 0:00:01]} Bc5 {[%emt 0:00: 11]} 47. h4 {[%emt 0:00:06]} gxh4 {[%emt 0:00:27]} 48. Bxh4 {[%emt 0:00:00]} Bd4+ {[%emt 0:00:00]} 49. Kc2 {[%emt 0:00:01]} Bc8 {[%emt 0:00:28]} 50. Bd8+ { [%emt 0:00:06]} Kc5 {[%emt 0:00:03]} 51. Be7+ {[%emt 0:00:02]} Kb6 {[%emt 0:00: 01]} 52. Bd8+ {[%emt 0:00:02]} Kc5 {[%emt 0:00:33]} 53. Be7+ {[%emt 0:00:02]} Kb6 {[%emt 0:00:01]} 54. Bd6 {[%emt 0:00:05]} Bd7 {[%emt 0:00:03]} 55. Be7 { [%emt 0:00:06]} Ka5 {[%emt 0:00:11]} 56. Bd8+ {[%emt 0:00:03]} Kb4 {[%emt 0:00: 04]} 57. Be7+ {[%emt 0:00:07]} Ka5 {[%emt 0:00:01]} 58. a3 {[%emt 0:00:02]} Kb6 {[%emt 0:00:04]} 59. Bd8+ {[%emt 0:00:01]} Kc5 {[%emt 0:00:01]} 60. Be7+ { [%emt 0:00:01]} Kb6 {[%emt 0:00:01]} 61. Bd8+ {[%emt 0:00:06]} Kc5 {[%emt 0:00: 02]} 62. Bf1 {[%emt 0:00:12]} Kd6 {[%emt 0:00:05]} 63. Ba5 {[%emt 0:00:09]} Bc5 {[%emt 0:00:13]} 64. Kb2 {[%emt 0:00:01]} Bd4+ {[%emt 0:00:01]} 65. Kc2 { [%emt 0:00:02]} Bc5 {[%emt 0:00:01]} 66. Kb2 {[%emt 0:00:06]} Bd4+ {[%emt 0:00: 01]} 67. Kc2 {[%emt 0:00:08]} 1/2-1/2 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "3.9"] [White "Bjerre, Jonas Buhl"] [Black "Mendonca, Leon Luke"] [Result "0-1"] [ECO "D78"] [WhiteElo "2550"] [BlackElo "2549"] [Annotator "Shahid"] [PlyCount "100"] [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 0,100,25,25,25,7,39,45,50,9,11,21,13,10,12,14,21,28,22,20,45,30,41,40, 49,48,42,2,-21,-30,3,-22,-31,-95,-56,0,9,-1,0,-29,-25,-34,-40,-112,-134,-162, -137,-124,-91,-91,-156,-158,-158,-171,-162,-170,-90,-163,-132,-136,-162,-186, -168,-199,-185,-192,-208,-188,-187,-225,-188,-187,-221,-227,-202,-304,-171, -169,-193,-276,-239,-318,0,-285,-270,-298,-303,-278,-302,-301,-307,-318,-332, -361,-392,-407,-404,-450,-479,-495,-558,-851,-1069]} 1. d4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 2. c4 {[%emt 0:00:00]} c6 {[%emt 0:00:00]} 3. Nf3 {[%emt 0:00: 00]} d5 {[%emt 0:00:02]} 4. g3 {[%emt 0:00:01]} g6 {[%emt 0:00:51]} 5. Bg2 { [%emt 0:00:04]} Bg7 {[%emt 0:00:07]} 6. O-O {[%emt 0:00:03]} O-O {[%emt 0:00: 01]} 7. b3 {[%emt 0:00:05]} a5 {[%emt 0:00:12]} 8. Nc3 {[%emt 0:00:08]} Bf5 { [%emt 0:02:33]} 9. Bb2 {[%emt 0:00:33]} Ne4 {[%emt 0:00:14]} 10. Ne5 {[%emt 0: 00:35]} Nxc3 {[%emt 0:02:12]} 11. Bxc3 {[%emt 0:00:03]} Bxe5 {[%emt 0:00:50]} 12. dxe5 {[%emt 0:00:17]} dxc4 {[%emt 0:00:02]} 13. Qc1 {[%emt 0:01:41]} cxb3 { [%emt 0:00:03]} 14. axb3 {[%emt 0:00:06]} Nd7 {[%emt 0:00:05]} 15. e4 {[%emt 0: 00:49]} Be6 {[%emt 0:00:08]} 16. f4 {[%emt 0:00:39]} Qb6+ {[%emt 0:01:02]} 17. Kh1 {[%emt 0:00:23]} f5 {[%emt 0:00:05]} 18. exf6 {[%emt 0:00:39]} exf6 { [%emt 0:00:01]} 19. f5 {[%emt 0:00:29]} gxf5 {[%emt 0:00:26]} 20. exf5 { [%emt 0:00:56]} Bxb3 {[%emt 0:00:18]} 21. Rb1 {[%emt 0:00:41]} a4 {[%emt 0:00: 09]} 22. g4 {[%emt 0:00:57]} Rae8 {[%emt 0:00:39]} 23. g5 $2 {[%emt 0:00:16]} ( 23. Rf3) 23... Qe3 {[%emt 0:00:06]} 24. Bd2 {[%emt 0:00:54]} Qc5 {[%emt 0:00: 12]} 25. Qxc5 {[%emt 0:00:46]} Nxc5 {[%emt 0:00:00]} 26. Bb4 {[%emt 0:00:01]} Re5 {[%emt 0:00:15]} 27. Bc3 {[%emt 0:00:08]} Ree8 {[%emt 0:00:32]} 28. Bb4 { [%emt 0:00:41]} b6 {[%emt 0:00:16]} 29. Bxc6 {[%emt 0:00:14]} Rc8 {[%emt 0:00: 06]} 30. Bg2 {[%emt 0:00:06]} fxg5 {[%emt 0:00:02]} 31. f6 {[%emt 0:00:01]} Kf7 {[%emt 0:00:11]} 32. Bf3 {[%emt 0:00:06]} Kg6 {[%emt 0:00:07]} 33. Bg4 { [%emt 0:00:05]} Rcd8 {[%emt 0:00:25]} 34. Bf5+ {[%emt 0:00:08]} Kf7 {[%emt 0: 00:01]} 35. Bg4 {[%emt 0:00:05]} Kg6 {[%emt 0:00:19]} 36. Rbe1 {[%emt 0:00:03]} Rde8 {[%emt 0:00:16]} 37. Rc1 {[%emt 0:00:14]} Re5 {[%emt 0:00:03]} 38. Bc3 { [%emt 0:00:02]} Rd5 {[%emt 0:00:05]} 39. Rce1 {[%emt 0:00:01]} h5 {[%emt 0:00: 04]} 40. Bf3 {[%emt 0:00:02]} Rf5 {[%emt 0:00:02]} 41. Kg1 {[%emt 0:00:05]} g4 {[%emt 0:00:03]} 42. Bc6 {[%emt 0:00:03]} Rxf1+ {[%emt 0:00:03]} 43. Kxf1 { [%emt 0:00:02]} a3 {[%emt 0:00:10]} 44. Re7 {[%emt 0:00:03]} Rxf6+ $1 {[%emt 0: 00:05]} 45. Bxf6 {[%emt 0:00:04]} Kxf6 {[%emt 0:00:00]} 46. Ra7 {[%emt 0:00:04] } a2 {[%emt 0:00:01]} 47. Ra3 {[%emt 0:00:04]} Ke5 {[%emt 0:00:03]} 48. Ke2 { [%emt 0:00:01]} Kd4 {[%emt 0:00:00]} 49. Kd2 {[%emt 0:00:01]} h4 {[%emt 0:00: 01]} 50. Kc1 {[%emt 0:00:30]} Kc3 {[%emt 0:00:02]} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "3.10"] [White "Gukesh D"] [Black "Keymer, Vincent"] [Result "1-0"] [ECO "D41"] [WhiteElo "2578"] [BlackElo "2591"] [Annotator "Shahid"] [PlyCount "163"] [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 0,163,25,-29,39,30,33,28,30,37,37,11,11,13,13,14,28,25,32,15,20,6,64,64, 54,49,54,45,45,45,45,30,38,44,45,29,29,19,32,16,13,26,26,0,15,-5,16,12,12,-62, 34,-46,44,77,77,77,61,65,61,61,52,-82,-62,-108,-108,-91,-59,-108,-65,-54,-33, -33,-28,-27,-10,-16,-36,-73,-85,-103,-69,-92,0,0,0,0,25,12,92,33,186,185,195, 186,182,154,152,142,133,145,177,142,140,140,142,142,175,139,157,155,195,197, 197,186,302,312,313,314,311,316,320,319,319,325,370,371,391,391,392,394,398, 387,548,407,408,388,411,407,414,443,469,420,426,429,467,504,513,506,512,566, 539,456,488,443,643,738,817,827,827,827,827,827,827,827,827,827]} 1. c4 { [%emt 0:00:00]} c6 {[%emt 0:00:00]} 2. e4 {[%emt 0:00:07]} d5 {[%emt 0:00:00]} 3. cxd5 {[%emt 0:00:02]} cxd5 {[%emt 0:00:00]} 4. exd5 {[%emt 0:00:01]} Nf6 { [%emt 0:00:02]} 5. Nc3 {[%emt 0:00:03]} Nxd5 {[%emt 0:00:08]} 6. Nf3 {[%emt 0: 00:02]} Nc6 {[%emt 0:00:03]} 7. Bc4 {[%emt 0:00:22]} e6 {[%emt 0:00:24]} 8. O-O {[%emt 0:00:05]} Be7 {[%emt 0:00:02]} 9. d4 {[%emt 0:00:36]} O-O {[%emt 0:00: 12]} 10. Qe2 {[%emt 0:00:50]} Nxc3 {[%emt 0:01:05]} 11. bxc3 {[%emt 0:00:02]} b6 {[%emt 0:00:07]} 12. Bd3 {[%emt 0:00:38]} Bb7 {[%emt 0:00:06]} 13. Qe4 { [%emt 0:01:31]} g6 {[%emt 0:00:03]} 14. Bh6 {[%emt 0:00:02]} Re8 {[%emt 0:00: 03]} 15. Qg4 {[%emt 0:00:19]} Bf8 {[%emt 0:02:24]} 16. Bg5 {[%emt 0:00:31]} Qc8 {[%emt 0:00:31]} 17. Rac1 {[%emt 0:00:32]} Bg7 {[%emt 0:00:36]} 18. Qh4 { [%emt 0:00:06]} Qc7 {[%emt 0:01:05]} 19. Rfe1 {[%emt 0:01:23]} Ne7 {[%emt 0:00: 56]} 20. Bf4 {[%emt 0:00:01]} Qd8 {[%emt 0:00:22]} 21. Qg3 {[%emt 0:03:16]} Nd5 {[%emt 0:00:33]} 22. Bg5 {[%emt 0:00:21]} Qc7 {[%emt 0:00:14]} 23. Qh4 { [%emt 0:00:38]} Rac8 {[%emt 0:00:04]} 24. c4 {[%emt 0:00:17]} Ne7 {[%emt 0:00: 09]} 25. Ne5 {[%emt 0:00:06]} Nc6 $2 {[%emt 0:00:30]} (25... Nf5 26. Bxf5 exf5) 26. Ng4 {[%emt 0:00:03]} f5 {[%emt 0:00:48]} 27. Nf6+ {[%emt 0:00:02]} Bxf6 { [%emt 0:00:01]} 28. Bxf6 {[%emt 0:00:00]} Qf7 {[%emt 0:00:01]} 29. d5 {[%emt 0: 00:12]} Nb4 {[%emt 0:00:10]} 30. Bb1 {[%emt 0:00:05]} (30. dxe6 Rxe6 31. Rxe6 Qxe6 32. Bf1) 30... exd5 {[%emt 0:00:10]} 31. Rxe8+ {[%emt 0:00:02]} Qxe8 { [%emt 0:00:31]} 32. Qh6 {[%emt 0:00:09]} Qf8 {[%emt 0:00:13]} 33. Qh4 {[%emt 0: 00:09]} Qe8 {[%emt 0:00:21]} 34. Qh6 {[%emt 0:00:05]} Qf7 {[%emt 0:00:07]} 35. Bc3 {[%emt 0:00:04]} Rxc4 {[%emt 0:00:12]} 36. a3 {[%emt 0:00:04]} Na6 { [%emt 0:00:35]} 37. Bd3 {[%emt 0:00:07]} Rc8 {[%emt 0:00:06]} 38. Bb2 {[%emt 0: 00:04]} Nc5 {[%emt 0:00:02]} 39. Bf1 {[%emt 0:00:03]} Rd8 {[%emt 0:00:05]} 40. Qh4 {[%emt 0:00:02]} Re8 {[%emt 0:00:04]} 41. Qd4 {[%emt 0:00:02]} Kf8 { [%emt 0:00:06]} 42. Qh8+ {[%emt 0:00:02]} Ke7 {[%emt 0:00:02]} 43. Re1+ { [%emt 0:00:10]} Ne6 $4 {[%emt 0:00:07]} (43... Ne4 44. Qd4) 44. Qe5 {[%emt 0: 00:07]} Kf8 {[%emt 0:00:08]} 45. Bb5 {[%emt 0:00:02]} Rc8 {[%emt 0:00:08]} 46. Qd6+ {[%emt 0:00:12]} Qe7 {[%emt 0:00:03]} 47. Rxe6 {[%emt 0:00:04]} Qxd6 { [%emt 0:00:02]} 48. Rxd6 {[%emt 0:00:01]} Rc2 {[%emt 0:00:05]} 49. Rd8+ { [%emt 0:00:04]} Ke7 {[%emt 0:00:02]} 50. Rd7+ {[%emt 0:00:01]} Ke6 {[%emt 0:00: 00]} 51. Rxb7 {[%emt 0:00:01]} Rxb2 {[%emt 0:00:01]} 52. Bf1 {[%emt 0:00:01]} d4 {[%emt 0:00:13]} 53. Rxa7 {[%emt 0:00:04]} Rb1 {[%emt 0:00:02]} 54. Ra8 { [%emt 0:00:05]} Ke7 {[%emt 0:00:08]} 55. Ra4 {[%emt 0:00:02]} Rd1 {[%emt 0:00: 05]} 56. g3 {[%emt 0:00:04]} d3 {[%emt 0:00:13]} 57. Rd4 {[%emt 0:00:03]} d2 { [%emt 0:00:07]} 58. Kg2 {[%emt 0:00:01]} Ke6 {[%emt 0:00:04]} 59. Be2 {[%emt 0: 00:08]} Ra1 {[%emt 0:00:04]} 60. Rxd2 {[%emt 0:00:01]} Rxa3 {[%emt 0:00:01]} 61. Rb2 {[%emt 0:00:01]} f4 {[%emt 0:00:01]} 62. Rxb6+ {[%emt 0:00:01]} Ke5 { [%emt 0:00:05]} 63. Rb5+ {[%emt 0:00:01]} Kf6 {[%emt 0:00:00]} 64. gxf4 { [%emt 0:00:02]} Rc3 {[%emt 0:00:03]} 65. Bf3 {[%emt 0:00:02]} h6 {[%emt 0:00: 05]} 66. Rb6+ {[%emt 0:00:08]} Kf5 {[%emt 0:00:03]} 67. Kg3 {[%emt 0:00:07]} h5 {[%emt 0:00:02]} 68. Rb5+ {[%emt 0:00:09]} Kf6 {[%emt 0:00:01]} 69. h4 { [%emt 0:00:03]} Ra3 {[%emt 0:00:08]} 70. f5 {[%emt 0:00:07]} gxf5 {[%emt 0:00: 05]} 71. Rb6+ {[%emt 0:00:03]} Kg7 {[%emt 0:00:05]} 72. Kf4 {[%emt 0:00:18]} Ra2 {[%emt 0:00:29]} 73. Kg5 {[%emt 0:00:13]} Rxf2 {[%emt 0:00:01]} 74. Rb7+ { [%emt 0:00:01]} Kg8 {[%emt 0:00:05]} 75. Kg6 {[%emt 0:00:15]} Kf8 {[%emt 0:00: 06]} 76. Kf6 {[%emt 0:00:01]} Ke8 {[%emt 0:00:01]} 77. Bxh5+ {[%emt 0:00:01]} Kd8 {[%emt 0:00:01]} 78. Bg6 {[%emt 0:00:03]} f4 {[%emt 0:00:02]} 79. h5 { [%emt 0:00:01]} f3 {[%emt 0:00:09]} 80. h6 {[%emt 0:00:03]} Rh2 {[%emt 0:00:04] } 81. Kg7 {[%emt 0:00:06]} f2 {[%emt 0:00:14]} 82. Rf7 {[%emt 0:00:01]} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "4.1"] [White "Zhu, Jiner"] [Black "Keymer, Vincent"] [Result "1/2-1/2"] [ECO "C78"] [WhiteElo "2459"] [BlackElo "2591"] [Annotator "Shahid"] [PlyCount "118"] [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 0,118,25,14,24,28,17,20,18,-2,4,-4,5,17,22,8,17,-6,-4,-40,4,-19,-4,3,15, 7,23,30,57,39,47,8,16,-23,-18,-17,-15,-35,-13,-10,2,-18,-17,-36,6,21,47,31,34, 21,22,-23,-28,-28,-34,-46,-14,-8,-30,-38,-23,-23,-17,-78,-19,-17,22,-3,97,44, 60,55,55,57,44,38,53,50,91,26,58,47,33,55,46,17,24,24,8,-3,46,5,74,36,44,0,9, -81,53,9,41,26,41,61,31,2,24,47,19,11,21,0,0,0,0,0,0,0,0,0,0]} 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 0:00:03]} a6 {[%emt 0:00:00]} 4. Ba4 {[%emt 0:00:01]} Nf6 {[%emt 0:00: 00]} 5. O-O {[%emt 0:00:02]} Bc5 {[%emt 0:00:01]} 6. d3 {[%emt 0:00:09]} d6 { [%emt 0:00:13]} 7. h3 {[%emt 0:00:05]} h6 {[%emt 0:00:10]} 8. c3 {[%emt 0:00: 03]} O-O {[%emt 0:00:43]} 9. Nbd2 {[%emt 0:00:14]} Ba7 {[%emt 0:00:26]} 10. Re1 {[%emt 0:00:10]} Ne7 {[%emt 0:00:21]} 11. Nf1 {[%emt 0:00:05]} Ng6 {[%emt 0:00: 08]} 12. Ng3 {[%emt 0:00:23]} Nh7 {[%emt 0:00:42]} 13. d4 {[%emt 0:01:30]} Ng5 {[%emt 0:00:52]} 14. Be3 {[%emt 0:01:22]} Qf6 {[%emt 0:00:41]} 15. Nh2 { [%emt 0:00:55]} Nf4 {[%emt 0:01:05]} 16. dxe5 {[%emt 0:04:19]} dxe5 {[%emt 0: 00:31]} 17. Bxa7 {[%emt 0:00:23]} Rxa7 {[%emt 0:00:02]} 18. Ng4 {[%emt 0:00:47] } Bxg4 {[%emt 0:02:01]} 19. Qxg4 {[%emt 0:00:02]} b5 {[%emt 0:00:21]} 20. Bb3 { [%emt 0:00:10]} c5 {[%emt 0:00:03]} 21. Bd5 {[%emt 0:00:31]} g6 {[%emt 0:00:43] } 22. h4 {[%emt 0:00:12]} Nh7 {[%emt 0:00:37]} 23. h5 {[%emt 0:00:09]} Kh8 { [%emt 0:00:05]} 24. Rad1 {[%emt 0:00:08]} Ng5 {[%emt 0:00:34]} 25. Kf1 { [%emt 0:00:06]} c4 {[%emt 0:00:27]} 26. Rd2 {[%emt 0:00:03]} Rc7 {[%emt 0:00: 15]} (26... Qd8) 27. Re3 {[%emt 0:00:02]} Kh7 {[%emt 0:00:10]} 28. b3 {[%emt 0: 00:02]} Rd8 {[%emt 0:00:07]} 29. bxc4 {[%emt 0:00:11]} Rxc4 {[%emt 0:00:11]} 30. Qd1 {[%emt 0:00:11]} Rcc8 {[%emt 0:00:07]} 31. Bb7 {[%emt 0:00:08]} Rb8 { [%emt 0:00:04]} 32. Bd5 {[%emt 0:00:02]} Rd6 {[%emt 0:00:17]} 33. hxg6+ { [%emt 0:00:10]} Nxg6 {[%emt 0:00:17]} 34. Nf5 {[%emt 0:00:01]} Rdd8 {[%emt 0: 00:05]} 35. g3 {[%emt 0:00:01]} Ne7 {[%emt 0:00:15]} 36. Nxe7 {[%emt 0:00:01]} Qxe7 {[%emt 0:00:00]} 37. Qg4 {[%emt 0:00:01]} Qf6 {[%emt 0:00:11]} 38. Red3 { [%emt 0:00:01]} b4 {[%emt 0:00:08]} 39. cxb4 {[%emt 0:00:05]} (39. c4) 39... Rxb4 {[%emt 0:00:06]} 40. Kg2 {[%emt 0:00:02]} a5 {[%emt 0:00:11]} 41. a3 { [%emt 0:00:01]} Rbb8 {[%emt 0:00:02]} 42. Bc4 {[%emt 0:00:04]} Rxd3 {[%emt 0: 00:05]} 43. Bxd3 {[%emt 0:00:02]} Rd8 {[%emt 0:00:03]} 44. Rd1 {[%emt 0:00:03]} Ne6 {[%emt 0:00:06]} 45. Bc4 {[%emt 0:00:03]} Nd4 {[%emt 0:00:03]} 46. Qh5 { [%emt 0:00:03]} Kg7 {[%emt 0:00:08]} 47. Rh1 {[%emt 0:00:01]} Rd6 {[%emt 0:00: 05]} 48. Rh4 {[%emt 0:00:02]} Qe7 {[%emt 0:00:06]} 49. Rh1 {[%emt 0:00:06]} Rg6 {[%emt 0:00:03]} 50. Rb1 {[%emt 0:00:06]} Rg5 {[%emt 0:00:10]} 51. Qd1 { [%emt 0:00:07]} Rg6 {[%emt 0:00:05]} 52. Bd5 {[%emt 0:00:01]} Qxa3 {[%emt 0:00: 03]} 53. Rb7 {[%emt 0:00:03]} Ne6 {[%emt 0:00:05]} 54. Bxe6 {[%emt 0:00:06]} Rxe6 {[%emt 0:00:00]} 55. Qg4+ {[%emt 0:00:01]} Rg6 {[%emt 0:00:03]} 56. Qf5 { [%emt 0:00:02]} Rf6 {[%emt 0:00:00]} 57. Qg4+ {[%emt 0:00:03]} Rg6 {[%emt 0:00: 19]} 58. Qf5 {[%emt 0:00:03]} Rf6 {[%emt 0:00:04]} 59. Qg4+ {[%emt 0:00:02]} Rg6 {[%emt 0:00:01]} 1/2-1/2 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "4.2"] [White "Mendonca, Leon Luke"] [Black "Gukesh D"] [Result "1/2-1/2"] [ECO "E54"] [WhiteElo "2549"] [BlackElo "2578"] [Annotator "Shahid"] [PlyCount "147"] [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 0,147,25,25,27,31,27,18,18,18,44,20,33,23,46,37,40,40,47,33,43,21,40,56, 38,22,21,22,8,18,25,20,16,16,21,18,46,41,34,33,24,42,20,-20,-8,-24,-45,-11,-18, -18,0,-72,-57,-59,-20,-17,10,-80,-31,-49,-31,-20,-10,-32,-1,6,0,35,30,15,15, -57,0,0,30,22,18,7,3,2,8,0,41,24,22,14,15,18,19,9,8,3,5,7,0,0,14,7,29,29,30,29, 34,22,23,21,9,6,0,0,0,0,0,0,1,-1,0,0,31,19,27,25,47,24,124,118,107,96,107,138, 129,127,145,163,164,171,183,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 {[%emt 0:00:00]} d5 {[%emt 0:00:00]} 2. Nf3 {[%emt 0:00:02]} Nf6 {[%emt 0:00:00]} 3. c4 { [%emt 0:00:03]} e6 {[%emt 0:00:06]} 4. Nc3 {[%emt 0:00:03]} c5 {[%emt 0:00:46]} 5. e3 {[%emt 0:00:39]} cxd4 {[%emt 0:00:35]} 6. exd4 {[%emt 0:00:02]} Bb4 { [%emt 0:00:03]} 7. Bd3 {[%emt 0:00:27]} dxc4 {[%emt 0:00:13]} 8. Bxc4 {[%emt 0: 00:01]} O-O {[%emt 0:00:02]} 9. O-O {[%emt 0:00:14]} Nbd7 {[%emt 0:00:23]} 10. Bg5 {[%emt 0:00:21]} Bxc3 {[%emt 0:00:34]} 11. bxc3 {[%emt 0:00:02]} Qc7 { [%emt 0:00:12]} 12. Qe2 {[%emt 0:00:37]} b6 {[%emt 0:00:13]} 13. Rac1 {[%emt 0: 00:49]} Bb7 {[%emt 0:00:13]} 14. Bd3 {[%emt 0:00:23]} Ng4 {[%emt 0:01:40]} 15. Be4 {[%emt 0:00:15]} Bxe4 {[%emt 0:00:05]} 16. Qxe4 {[%emt 0:00:00]} Ngf6 { [%emt 0:00:01]} 17. Qe2 {[%emt 0:00:15]} Qb7 {[%emt 0:00:37]} 18. c4 {[%emt 0: 00:22]} Qe4 {[%emt 0:00:21]} 19. Qxe4 {[%emt 0:01:49]} Nxe4 {[%emt 0:00:01]} 20. Be3 {[%emt 0:00:06]} Rac8 {[%emt 0:00:07]} 21. a4 {[%emt 0:00:16]} Rc6 { [%emt 0:01:13]} 22. Rc2 {[%emt 0:00:23]} Rfc8 {[%emt 0:00:11]} 23. Rfc1 { [%emt 0:00:01]} Nd6 {[%emt 0:00:14]} 24. Nd2 {[%emt 0:02:25]} Nf6 {[%emt 0:00: 02]} 25. Kf1 {[%emt 0:00:30]} Nd5 {[%emt 0:01:30]} 26. Ke2 {[%emt 0:00:08]} a5 {[%emt 0:00:02]} 27. c5 {[%emt 0:00:17]} Nf5 {[%emt 0:00:56]} 28. Nb3 {[%emt 0: 00:13]} Kf8 {[%emt 0:00:46]} 29. Rc4 {[%emt 0:00:53]} (29. Bd2) 29... Nd6 { [%emt 0:00:45]} 30. R4c2 {[%emt 0:00:05]} Nf5 {[%emt 0:00:10]} 31. Kd2 { [%emt 0:00:17]} Nb4 {[%emt 0:00:15]} 32. Rb2 {[%emt 0:00:21]} Nd5 {[%emt 0:00: 14]} 33. cxb6 {[%emt 0:00:15]} Rxc1 {[%emt 0:00:01]} 34. Nxc1 {[%emt 0:00:00]} Nd6 {[%emt 0:00:01]} 35. Ke2 {[%emt 0:00:09]} Rb8 {[%emt 0:00:08]} (35... Nxe3 36. b7 (36. fxe3 Rxc1 37. b7 Nxb7 38. Rxb7 Rc4) 36... Nxb7 37. fxe3 Rxc1 38. Rxb7 Rc4) 36. b7 {[%emt 0:00:07]} Rxb7 {[%emt 0:00:08]} 37. Rxb7 {[%emt 0:00: 01]} Nxb7 {[%emt 0:00:00]} 38. Bd2 {[%emt 0:00:02]} Nb6 {[%emt 0:00:12]} 39. Nb3 {[%emt 0:00:02]} Nxa4 {[%emt 0:00:04]} 40. Nxa5 {[%emt 0:00:01]} Nd8 { [%emt 0:00:03]} 41. Bb4+ {[%emt 0:00:05]} Ke8 {[%emt 0:00:02]} 42. Kd3 { [%emt 0:00:03]} Nb6 {[%emt 0:00:01]} 43. Nc4 {[%emt 0:00:04]} Nd5 {[%emt 0:00: 02]} 44. Bd2 {[%emt 0:00:03]} f6 {[%emt 0:00:02]} 45. g3 {[%emt 0:00:02]} Nc6 { [%emt 0:00:02]} 46. Nd6+ {[%emt 0:00:09]} Kd7 {[%emt 0:00:02]} 47. Ne4 { [%emt 0:00:00]} Ke7 {[%emt 0:00:06]} 48. Kc4 {[%emt 0:00:04]} Kf7 {[%emt 0:00: 07]} 49. h3 {[%emt 0:00:11]} Nce7 {[%emt 0:00:03]} 50. Nd6+ {[%emt 0:00:02]} Kg6 {[%emt 0:00:02]} 51. Kd3 {[%emt 0:00:05]} h5 {[%emt 0:00:02]} 52. Ne4 { [%emt 0:00:10]} Nf5 {[%emt 0:00:10]} 53. Nc5 {[%emt 0:00:03]} Kf7 {[%emt 0:00: 04]} 54. Ne4 {[%emt 0:00:01]} g5 {[%emt 0:00:13]} 55. Nc5 {[%emt 0:00:13]} h4 { [%emt 0:00:08]} 56. g4 {[%emt 0:00:02]} Nfe7 {[%emt 0:00:04]} 57. Ke4 {[%emt 0: 00:03]} Ng6 {[%emt 0:00:15]} 58. Nd3 {[%emt 0:00:01]} Nde7 {[%emt 0:00:04]} 59. f4 {[%emt 0:00:02]} gxf4 {[%emt 0:00:05]} 60. Nxf4 {[%emt 0:00:03]} f5+ { [%emt 0:00:04]} 61. gxf5 {[%emt 0:00:06]} Nxf5 {[%emt 0:00:05]} 62. Nxg6 { [%emt 0:00:04]} Kxg6 {[%emt 0:00:01]} 63. Ke5 {[%emt 0:00:03]} Ng7 {[%emt 0:00: 08]} 64. Be1 {[%emt 0:00:03]} Kg5 {[%emt 0:00:07]} 65. Bf2 {[%emt 0:00:02]} Nf5 {[%emt 0:00:05]} 66. Kxe6 {[%emt 0:00:21]} Kf4 {[%emt 0:00:05]} 67. d5 { [%emt 0:00:04]} Ke4 {[%emt 0:00:01]} 68. Bg1 {[%emt 0:00:19]} Ng7+ {[%emt 0:00: 04]} 69. Kf6 {[%emt 0:00:02]} Kxd5 {[%emt 0:00:10]} 70. Bf2 {[%emt 0:00:14]} Ke4 {[%emt 0:00:06]} 71. Bxh4 {[%emt 0:00:02]} Nh5+ {[%emt 0:00:01]} 72. Kg5 { [%emt 0:00:08]} Nf4 {[%emt 0:00:00]} 73. Kg4 {[%emt 0:00:00]} Nxh3 {[%emt 0:00: 01]} 74. Kxh3 {[%emt 0:00:00]} 1/2-1/2 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "4.3"] [White "Abdumalik, Zhansaya"] [Black "Bjerre, Jonas Buhl"] [Result "0-1"] [ECO "B90"] [WhiteElo "2472"] [BlackElo "2550"] [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 0,92,25,28,49,52,89,72,52,40,41,37,72,32,21,-17,15,13,13,27,40,28,12,-5, -11,-11,18,-17,-9,-11,-11,-6,-9,26,-2,-32,-22,-95,9,-56,-22,-50,-71,-32,21,-34, -66,-34,-27,-52,-8,-41,-8,-94,-86,-77,-77,-77,-91,-116,-125,-162,-171,-156, -183,-195,-185,-261,-166,-202,-237,-207,-228,-259,-261,-472,-336,-568,-280, -362,-452,-2310,-483,-639,-712,-715,-588,-596,-639,-944,-1032,-1076,-1122, -1789,-2049]} 1. e4 {[%emt 0:00:00]} c5 {[%emt 0:00:00]} 2. Nf3 {[%emt 0:00:00] } d6 {[%emt 0:00:00]} 3. d4 {[%emt 0:00:00]} cxd4 {[%emt 0:00:00]} 4. Nxd4 { [%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 5. Nc3 {[%emt 0:00:00]} a6 {[%emt 0:00:00] } 6. h3 {[%emt 0:00:00]} e5 {[%emt 0:00:00]} 7. Nde2 {[%emt 0:00:02]} h5 { [%emt 0:00:01]} 8. g3 {[%emt 0:00:01]} Be7 {[%emt 0:00:01]} 9. Bg2 {[%emt 0:00: 01]} b5 {[%emt 0:00:01]} 10. O-O {[%emt 0:02:03]} Nbd7 {[%emt 0:00:23]} 11. a4 {[%emt 0:00:07]} b4 {[%emt 0:00:21]} 12. Nd5 {[%emt 0:00:01]} a5 {[%emt 0:01: 10]} 13. Nxe7 {[%emt 0:01:11]} Qxe7 {[%emt 0:00:04]} 14. c3 {[%emt 0:00:03]} Nc5 {[%emt 0:00:56]} 15. Bg5 {[%emt 0:00:38]} Qe6 {[%emt 0:00:39]} 16. f4 { [%emt 0:00:04]} Ba6 {[%emt 0:01:12]} 17. cxb4 {[%emt 0:01:13]} axb4 {[%emt 0: 00:11]} 18. Rc1 {[%emt 0:01:28]} Rc8 {[%emt 0:02:30]} 19. fxe5 {[%emt 0:01:17]} dxe5 {[%emt 0:00:04]} 20. Bxf6 {[%emt 0:00:16]} gxf6 {[%emt 0:00:03]} 21. Qd2 { [%emt 0:00:14]} O-O {[%emt 0:00:38]} (21... Rd8 22. Qe3 Nxa4 23. b3 (23. Ra1 Nxb2) 23... Rd3) 22. Qh6 {[%emt 0:00:36]} f5 {[%emt 0:01:09]} 23. Qxh5 { [%emt 0:00:39]} Qg6 {[%emt 0:00:35]} 24. Bf3 {[%emt 0:00:28]} Qxh5 {[%emt 0:00: 55]} 25. Bxh5 {[%emt 0:00:01]} fxe4 {[%emt 0:00:06]} 26. Rf6 {[%emt 0:00:21]} Bxe2 {[%emt 0:00:16]} 27. Bxe2 {[%emt 0:00:01]} Nxa4 {[%emt 0:00:07]} 28. Rxc8 {[%emt 0:00:18]} Rxc8 {[%emt 0:00:02]} 29. b3 {[%emt 0:00:00]} Kg7 {[%emt 0:00: 24]} 30. Rd6 {[%emt 0:00:27]} Rc1+ {[%emt 0:00:16]} 31. Kf2 {[%emt 0:00:05]} Nc5 {[%emt 0:00:04]} 32. Rb6 {[%emt 0:00:30]} Rc2 {[%emt 0:00:11]} 33. Kf1 { [%emt 0:00:11]} Nd3 {[%emt 0:00:07]} 34. Rd6 {[%emt 0:00:18]} Rc3 {[%emt 0:00: 07]} 35. Bd1 {[%emt 0:00:05]} Nc5 {[%emt 0:00:08]} 36. Kf2 {[%emt 0:00:06]} Nxb3 {[%emt 0:00:04]} 37. Rd5 {[%emt 0:00:01]} Nc5 {[%emt 0:00:04]} 38. Be2 { [%emt 0:00:02]} f6 {[%emt 0:00:03]} 39. h4 {[%emt 0:00:07]} b3 {[%emt 0:00:01]} 40. Rd2 {[%emt 0:00:03]} Rc2 {[%emt 0:00:03]} 41. Rd6 {[%emt 0:00:04]} b2 { [%emt 0:00:06]} 42. Rb6 {[%emt 0:00:01]} Na4 {[%emt 0:00:02]} 43. Rb7+ { [%emt 0:00:01]} Kh6 {[%emt 0:00:03]} 44. g4 {[%emt 0:00:24]} Nc3 {[%emt 0:00: 03]} 45. g5+ {[%emt 0:00:02]} fxg5 {[%emt 0:00:02]} 46. hxg5+ {[%emt 0:00:03]} Kxg5 {[%emt 0:00:04]} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "4.4"] [White "Khademalsharieh, Sarasadat"] [Black "Shuvalova, Polina"] [Result "0-1"] [ECO "D29"] [WhiteElo "2494"] [BlackElo "2476"] [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 0,92,28,25,25,7,7,7,18,20,54,18,16,22,9,-10,-16,-22,-13,-23,-16,-16,20, -25,21,10,30,21,13,28,21,10,10,0,4,0,5,-13,13,-18,-41,10,0,-38,-47,-41,29,-8, -35,-19,-19,-16,-12,-50,24,37,17,-1,2,0,68,-13,-23,-23,0,-44,-28,-70,-93,-99, -124,-130,-176,-186,-134,-357,-357,-360,-360,-895,-859,-879,-900,-1000,-1424, -1467,-1396,-1670,-1035,-1039,-850,-1215,-340,-340,-362]} 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 0:00:01]} dxc4 {[%emt 0:00: 04]} 5. e3 {[%emt 0:00:14]} a6 {[%emt 0:00:13]} 6. Bxc4 {[%emt 0:00:02]} b5 { [%emt 0:00:16]} 7. Bb3 {[%emt 0:00:04]} Bb7 {[%emt 0:00:22]} 8. O-O {[%emt 0: 00:06]} c5 {[%emt 0:00:02]} 9. Qe2 {[%emt 0:01:27]} Nbd7 {[%emt 0:00:08]} 10. Rd1 {[%emt 0:00:18]} Be7 {[%emt 0:01:05]} 11. d5 {[%emt 0:02:21]} exd5 { [%emt 0:00:19]} 12. Nxd5 {[%emt 0:00:02]} Nxd5 {[%emt 0:00:15]} 13. Bxd5 { [%emt 0:00:01]} Bxd5 {[%emt 0:00:11]} 14. Rxd5 {[%emt 0:00:02]} Qc7 {[%emt 0: 00:32]} 15. e4 {[%emt 0:00:07]} O-O {[%emt 0:00:20]} 16. e5 {[%emt 0:00:49]} Nb6 {[%emt 0:00:40]} 17. Rd1 {[%emt 0:00:02]} Rad8 {[%emt 0:00:06]} 18. Bf4 { [%emt 0:00:19]} c4 {[%emt 0:00:11]} 19. h4 {[%emt 0:00:10]} h6 {[%emt 0:00:36]} 20. Nd4 {[%emt 0:00:56]} Qc8 {[%emt 0:01:30]} 21. Qe4 {[%emt 0:00:55]} Bc5 { [%emt 0:00:16]} 22. Nf5 {[%emt 0:01:03]} Qe6 {[%emt 0:00:08]} 23. h5 {[%emt 0: 00:03]} Kh8 {[%emt 0:02:23]} 24. Bg3 {[%emt 0:00:16]} Rfe8 {[%emt 0:00:26]} 25. Qg4 {[%emt 0:00:24]} Bf8 {[%emt 0:00:04]} 26. Qf3 {[%emt 0:00:35]} b4 {[%emt 0: 00:28]} 27. Nd6 {[%emt 0:00:37]} Bxd6 {[%emt 0:00:02]} 28. exd6 {[%emt 0:00:02] } Nd7 {[%emt 0:00:07]} 29. Qc6 {[%emt 0:00:28]} a5 {[%emt 0:00:12]} 30. Rac1 { [%emt 0:00:01]} (30. Re1 Qg4 (30... Qxe1+ 31. Rxe1 Rxe1+ 32. Kh2 $18) 31. Qd5) 30... Rc8 {[%emt 0:00:06]} 31. Qf3 {[%emt 0:00:18]} Rc5 {[%emt 0:00:30]} 32. Rd4 {[%emt 0:00:32]} Nf6 {[%emt 0:00:17]} 33. Rh4 $6 {[%emt 0:00:19]} (33. Qe3 Qd7 34. Qf3) 33... c3 $1 {[%emt 0:00:12]} 34. bxc3 {[%emt 0:00:01]} bxc3 { [%emt 0:00:02]} 35. Kh2 $2 {[%emt 0:00:01]} (35. Rd4) 35... c2 {[%emt 0:00:05]} 36. Bf4 {[%emt 0:00:08]} Rd8 {[%emt 0:00:23]} 37. Qe3 {[%emt 0:00:10]} Ng4+ { [%emt 0:00:14]} 38. Rxg4 {[%emt 0:00:02]} Qxg4 {[%emt 0:00:10]} 39. Bg3 { [%emt 0:00:01]} Rxh5+ {[%emt 0:00:08]} 40. Kg1 {[%emt 0:00:01]} Rd5 {[%emt 0: 00:02]} 41. Qe7 {[%emt 0:00:08]} Rd1+ {[%emt 0:00:01]} 42. Kh2 {[%emt 0:00:03]} Qh5+ {[%emt 0:00:02]} 43. Bh4 {[%emt 0:00:01]} R8xd6 {[%emt 0:00:04]} 44. Rxc2 {[%emt 0:00:03]} Re6 {[%emt 0:00:07]} 45. Rc5 {[%emt 0:00:17]} Rh1+ {[%emt 0: 00:09]} 46. Kxh1 {[%emt 0:00:07]} Qd1+ {[%emt 0:00:00]} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "4.5"] [White "Abdusattorov, Nodirbek"] [Black "Yoo, Christopher Woojin"] [Result "1/2-1/2"] [ECO "B22"] [WhiteElo "2627"] [BlackElo "2455"] [Annotator "TA"] [PlyCount "94"] [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 12,94,18,12,14,0,12,0,17,18,36,10,19,0,43,34,62,54,52,15,18,23,55,46,47, 36,51,19,93,97,101,0,1,0,-7,-43,-55,-87,-81,-81,-76,-89,-81,-99,-72,-185,-181, -191,-197,-214,-199,-209,-45,-98,-8,-8,-8,-8,-8,-14,-14,-20,-20,-29,-8,-8,-8, -14,-8,-14,-14,-14,-14,-21,-21,-21,-8,-21,-22,-29,0,-29,0,-32,0]} 1. e4 c5 2. Nf3 e6 3. c3 d5 4. exd5 Qxd5 5. d4 Nf6 6. Na3 Nc6 7. Be3 $1 {[%mdl 4] is more profitable than 7.Nb5 at the moment.} cxd4 {[#] B22: Sicilian: 2 c3.} 8. Nb5 $1 {[%CAl Rb5c7]} Qd7 (8... Qd8 {feels hotter.} 9. Nbxd4 Nd5 10. Bg5 f6 11. Bh4 e5 ) 9. Nbxd4 a6 {The position is equal.} 10. Nxc6 Qxc6 {[#]} 11. Ne5 $146 ({ Predecessor:} 11. Bd3 Bd6 12. Bd4 b5 13. Bxf6 gxf6 14. Nd2 f5 15. Be2 Bb7 16. Bf3 Qc7 17. c4 {0-1 (42) Al Shamsi,O (1469)-Yasmin,A (1509) Ajman 2019}) 11... Qc7 12. Qa4+ Bd7 (12... Nd7 {with more complications.} 13. Nf3 Be7 14. Bf4 Qc5 15. Rd1 b5) 13. Nxd7 Qxd7 14. Qxd7+ Nxd7 15. Be2 Bc5 16. Bf4 Ke7 17. O-O-O b5 18. Bf3 Ra7 19. b4 Bxf2 (19... Bb6 $1 $11 {keeps the balance.}) 20. Bd6+ $1 $16 Kd8 21. Bc6 ({White should play} 21. Bb8 $16 Ke7 22. Bxa7 Bxa7 23. Rhe1) 21... Kc8 $1 $11 22. a4 Nb6 23. axb5 Nc4 $1 {Threatens to win with ...axb5.} 24. Bf4 axb5 25. Bxb5 {[#]} Be3+ $1 {[%mdl 64] Double Attack} 26. Kc2 Na3+ {[%mdl 64] Double Attack} 27. Kb3 Bxf4 28. Bc6 (28. Be2 $17) 28... Rd8 $19 29. Rxd8+ Kxd8 30. g3 Be5 31. Rd1+ Kc7 $2 ({Better is} 31... Ke7 $19 {Hoping for ...h6.} 32. c4 {[#]} Rc7 $1) 32. Rd7+ (32. Ba4 $15) 32... Kb6 (32... Kxc6 $17 33. Rxa7 Nb1) 33. Rxa7 $11 Kxa7 34. Kxa3 Bxc3 {[%mdl 4096] Endgame KB-KB} 35. Be8 f6 36. Bf7 e5 37. Bg8 h6 38. Kb3 Bd4 39. Bh7 Kb6 40. Be4 Kc7 41. Kc4 Kd6 42. g4 Bg1 43. h3 Bf2 44. Kb5 Be1 45. Kc4 Bf2 46. Kb5 Be1 47. Kc4 Bf2 {Weighted Error Value: White=0.15/Black=0.21} 1/2-1/2 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "4.6"] [White "Murzin, Volodar"] [Black "Liang, Awonder"] [Result "1-0"] [ECO "B10"] [WhiteElo "2478"] [BlackElo "2592"] [Annotator "ChessBase"] [PlyCount "169"] [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"] 1. e4 {[%emt 0:00:00]} c6 {[%emt 0:00:00]} 2. Nf3 {[%emt 0:00:00]} d5 {[%emt 0: 00:00]} 3. exd5 {[%emt 0:00:01]} cxd5 {[%emt 0:00:00]} 4. Ne5 {[%emt 0:00:01]} Nf6 {[%emt 0:00:03]} 5. d4 {[%emt 0:00:08]} Nc6 {[%emt 0:00:12]} 6. Bb5 { [%emt 0:00:18]} Bd7 {[%emt 0:00:01]} 7. Nxd7 {[%emt 0:00:06]} Qxd7 {[%emt 0:00: 06]} 8. c3 {[%emt 0:00:01]} e6 {[%emt 0:00:13]} 9. O-O {[%emt 0:00:07]} Bd6 { [%emt 0:00:02]} 10. Nd2 {[%emt 0:00:03]} O-O {[%emt 0:00:05]} 11. Nf3 {[%emt 0: 02:05]} Qc7 {[%emt 0:00:05]} 12. g3 {[%emt 0:00:24]} Ne4 {[%emt 0:00:16]} 13. Bd3 {[%emt 0:00:21]} Rae8 {[%emt 0:00:10]} 14. Ng5 {[%emt 0:00:33]} f5 { [%emt 0:00:04]} 15. Kg2 {[%emt 0:01:06]} h6 {[%emt 0:02:12]} 16. Nh3 {[%emt 0: 00:14]} g5 {[%emt 0:00:02]} 17. f3 {[%emt 0:00:05]} Nf6 {[%emt 0:00:01]} 18. Bd2 {[%emt 0:01:37]} Qg7 {[%emt 0:00:05]} 19. Kh1 {[%emt 0:00:43]} Kh8 { [%emt 0:00:04]} 20. Qe2 {[%emt 0:00:17]} Rg8 {[%emt 0:02:35]} 21. Rae1 { [%emt 0:00:16]} Qf7 {[%emt 0:00:03]} 22. Qg2 {[%emt 0:00:21]} g4 {[%emt 0:00: 25]} 23. fxg4 {[%emt 0:00:26]} Rxg4 {[%emt 0:00:01]} 24. Nf4 {[%emt 0:00:13]} Ne4 {[%emt 0:00:10]} 25. Bxe4 {[%emt 0:00:44]} dxe4 {[%emt 0:00:04]} 26. Qh3 { [%emt 0:00:01]} Bxf4 {[%emt 0:01:07]} 27. Rxf4 {[%emt 0:00:10]} h5 {[%emt 0:00: 45]} 28. Rxg4 {[%emt 0:01:10]} fxg4 {[%emt 0:00:03]} 29. Qg2 {[%emt 0:00:02]} e5 {[%emt 0:00:16]} 30. Qxe4 {[%emt 0:00:12]} Rd8 {[%emt 0:00:42]} 31. Bg5 { [%emt 0:00:05]} Rg8 {[%emt 0:00:07]} 32. Be3 {[%emt 0:00:27]} exd4 {[%emt 0:01: 35]} 33. Bxd4+ {[%emt 0:00:07]} Nxd4 {[%emt 0:00:01]} 34. Qxd4+ {[%emt 0:00:00] } Rg7 {[%emt 0:00:05]} 35. Kg1 {[%emt 0:00:12]} b6 {[%emt 0:00:12]} 36. a4 { [%emt 0:00:15]} Kh7 {[%emt 0:00:05]} 37. Re5 {[%emt 0:00:01]} Qg6 {[%emt 0:00: 13]} 38. Qd2 {[%emt 0:00:11]} Qb1+ {[%emt 0:00:03]} 39. Re1 {[%emt 0:00:02]} Qf5 {[%emt 0:00:02]} 40. Qf2 {[%emt 0:00:03]} Qg6 {[%emt 0:00:06]} 41. Qd4 { [%emt 0:00:01]} Rf7 {[%emt 0:00:03]} 42. Qe4 {[%emt 0:00:01]} Kg7 {[%emt 0:00: 07]} 43. Qxg6+ {[%emt 0:00:09]} Kxg6 {[%emt 0:00:00]} 44. Re4 {[%emt 0:00:05]} Rd7 {[%emt 0:00:06]} 45. Kf2 {[%emt 0:00:01]} Rd1 {[%emt 0:00:04]} 46. Re1 { [%emt 0:00:08]} Rd2+ {[%emt 0:00:02]} 47. Re2 {[%emt 0:00:00]} Rd1 {[%emt 0:00: 01]} 48. Ke3 {[%emt 0:00:16]} Kf5 {[%emt 0:00:11]} 49. Rd2 {[%emt 0:00:09]} Ra1 {[%emt 0:00:22]} 50. b3 {[%emt 0:00:02]} Ra3 {[%emt 0:00:05]} 51. Rb2 {[%emt 0: 00:03]} Ke5 {[%emt 0:00:01]} 52. Kd3 {[%emt 0:00:02]} Kd5 {[%emt 0:00:06]} 53. c4+ {[%emt 0:00:09]} Kc5 {[%emt 0:00:05]} 54. Kc3 {[%emt 0:00:01]} Ra1 { [%emt 0:00:16]} 55. Rd2 {[%emt 0:00:02]} Kc6 {[%emt 0:00:18]} 56. Rd5 {[%emt 0: 00:03]} h4 {[%emt 0:00:02]} 57. gxh4 {[%emt 0:00:07]} Rc1+ {[%emt 0:00:16]} 58. Kb4 {[%emt 0:00:11]} Rc2 {[%emt 0:00:04]} 59. Rg5 {[%emt 0:00:02]} a5+ { [%emt 0:00:04]} 60. Ka3 {[%emt 0:00:03]} Rg2 {[%emt 0:00:02]} 61. b4 {[%emt 0: 00:12]} Rxh2 {[%emt 0:00:20]} 62. Rg6+ {[%emt 0:00:08]} Kc7 {[%emt 0:00:03]} 63. bxa5 {[%emt 0:00:01]} bxa5 {[%emt 0:00:06]} 64. Rxg4 {[%emt 0:00:02]} Rh3+ {[%emt 0:00:00]} 65. Kb2 {[%emt 0:00:02]} Kc6 {[%emt 0:00:01]} 66. Kc2 { [%emt 0:00:06]} Kc5 {[%emt 0:00:01]} 67. Kd2 {[%emt 0:00:01]} Kb4 {[%emt 0:00: 03]} 68. c5+ {[%emt 0:00:07]} Kxc5 {[%emt 0:00:01]} 69. Ke2 {[%emt 0:00:02]} Rb3 {[%emt 0:00:25]} 70. Kf2 {[%emt 0:00:02]} Kd6 {[%emt 0:00:02]} 71. h5 { [%emt 0:00:11]} Rh3 {[%emt 0:00:11]} 72. Rg5 {[%emt 0:00:02]} Rh4 {[%emt 0:00: 05]} 73. Rxa5 {[%emt 0:00:02]} Ke6 {[%emt 0:00:01]} 74. Kg3 {[%emt 0:00:01]} Rb4 {[%emt 0:00:01]} 75. h6 {[%emt 0:00:13]} Kf7 {[%emt 0:00:04]} 76. Rh5 { [%emt 0:00:11]} Kg8 {[%emt 0:00:04]} 77. a5 {[%emt 0:00:03]} Kh7 {[%emt 0:00: 05]} 78. Kf3 {[%emt 0:00:01]} Ra4 {[%emt 0:00:09]} 79. Ke3 {[%emt 0:00:01]} Rb4 {[%emt 0:00:05]} 80. Kd3 {[%emt 0:00:01]} Ra4 {[%emt 0:00:09]} 81. Kc3 { [%emt 0:00:02]} Rg4 {[%emt 0:00:01]} 82. Kb3 {[%emt 0:00:02]} Rg1 {[%emt 0:00: 07]} 83. Kb4 {[%emt 0:00:04]} Rb1+ {[%emt 0:00:01]} 84. Kc5 {[%emt 0:00:01]} Rc1+ {[%emt 0:00:03]} 85. Kb6 {[%emt 0:00:02]} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "4.7"] [White "Mammadzada, Gunay"] [Black "Saduakassova, Dinara"] [Result "1/2-1/2"] [ECO "C83"] [WhiteElo "2443"] [BlackElo "2500"] [Annotator "ChessBase"] [PlyCount "76"] [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"] 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: 02]} Nf6 {[%emt 0:00:00]} 5. O-O {[%emt 0:00:02]} Nxe4 {[%emt 0:00:00]} 6. d4 { [%emt 0:00:02]} b5 {[%emt 0:00:01]} 7. Bb3 {[%emt 0:00:01]} d5 {[%emt 0:00:01]} 8. dxe5 {[%emt 0:00:01]} Be6 {[%emt 0:00:01]} 9. c3 {[%emt 0:00:05]} Be7 { [%emt 0:00:06]} 10. Nbd2 {[%emt 0:00:04]} Nc5 {[%emt 0:00:01]} 11. Bc2 { [%emt 0:00:15]} d4 {[%emt 0:00:02]} 12. Nb3 {[%emt 0:00:02]} d3 {[%emt 0:00:01] } 13. Bb1 {[%emt 0:00:01]} Nxb3 {[%emt 0:00:02]} 14. axb3 {[%emt 0:00:00]} Bf5 {[%emt 0:00:01]} 15. h3 {[%emt 0:00:02]} O-O {[%emt 0:00:02]} 16. b4 {[%emt 0: 00:08]} Qd7 {[%emt 0:00:05]} 17. Re1 {[%emt 0:00:02]} Rfd8 {[%emt 0:00:10]} 18. Bf4 {[%emt 0:00:34]} a5 {[%emt 0:00:31]} 19. bxa5 {[%emt 0:01:23]} Rxa5 { [%emt 0:00:03]} 20. Rxa5 {[%emt 0:00:26]} Nxa5 {[%emt 0:00:01]} 21. e6 { [%emt 0:02:30]} fxe6 {[%emt 0:00:52]} 22. g4 {[%emt 0:00:25]} Bg6 {[%emt 0:00: 35]} 23. Ne5 {[%emt 0:00:02]} Qd5 {[%emt 0:00:33]} 24. Nxg6 {[%emt 0:00:23]} hxg6 {[%emt 0:00:01]} 25. Bxc7 {[%emt 0:00:02]} d2 {[%emt 0:00:05]} 26. Rf1 { [%emt 0:01:04]} Nc4 {[%emt 0:00:05]} 27. Bxd8 {[%emt 0:00:32]} Nxb2 {[%emt 0: 00:03]} 28. Qc2 {[%emt 0:00:08]} Qxd8 {[%emt 0:00:18]} 29. Qxg6 {[%emt 0:02:51] } d1=Q {[%emt 0:00:03]} 30. Qxe6+ {[%emt 0:00:02]} Kf8 {[%emt 0:01:13]} 31. Qf5+ {[%emt 0:00:02]} Bf6 {[%emt 0:00:23]} 32. Rxd1 {[%emt 0:00:06]} Qxd1+ { [%emt 0:00:05]} 33. Kg2 {[%emt 0:00:00]} Qd2 {[%emt 0:00:59]} 34. Qc5+ { [%emt 0:00:31]} Be7 {[%emt 0:00:36]} 35. Qc8+ {[%emt 0:00:20]} Bd8 {[%emt 0:00: 08]} 36. Qf5+ {[%emt 0:00:04]} Bf6 {[%emt 0:00:03]} 37. Qc8+ {[%emt 0:00:41]} Bd8 {[%emt 0:00:05]} 38. Qf5+ {[%emt 0:00:06]} Bf6 {[%emt 0:00:01]} 1/2-1/2 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "4.8"] [White "Nihal Sarin"] [Black "Salimova, Nurgyul"] [Result "1-0"] [ECO "E05"] [WhiteElo "2620"] [BlackElo "2397"] [Annotator "Shahid"] [PlyCount "91"] [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 21,91,6,9,10,14,4,14,-13,0,7,5,0,15,8,42,32,41,20,35,39,68,65,72,64,64, 51,66,42,50,50,49,52,75,64,56,47,68,68,69,69,72,28,28,10,33,0,0,0,0,0,0,0,0, -57,0,0,600,590,579,570,528,472,464,432,631,589,629,621,629,558,29986,1929]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O dxc4 7. Qc2 a6 8. a4 Bd7 9. Qxc4 Bc6 10. Bg5 Nbd7 11. Nc3 h6 12. Bxf6 {E05: Open Catalan: 5 Nf3 Be7.} Nxf6 13. Rfd1 $1 {[%mdl 4] is now more promising than 13.b4.} Qd6 {[#]} 14. Ne1 $146 {The position is equal.} ({Predecessor:} 14. Qd3 Rfd8 15. e4 Qb4 16. Qc2 Rac8 17. Rd2 Qb6 18. Rad1 Bb4 19. Ne5 Be8 20. Nc4 {0-1 (60) Le,Q (2713) -Aronian,L (2775) Moscow 2019}) 14... Bxg2 15. Kxg2 Rad8 16. Nf3 c6 17. a5 Qb8 18. e4 Qa7 19. h4 Rd7 20. Rd2 Bd8 21. Ne5 Re7 22. b4 Bc7 23. Nf3 Rd7 24. e5 Nd5 25. Ne4 Re7 26. Nc5 f6 27. exf6 Rxf6 28. Ne5 Bxe5 29. dxe5 Rf5 30. Re1 Qb8 31. Qe4 {With the idea Nxe6!} Qf8 32. f3 g5 33. h5 Qf7 34. Rd3 Re8 (34... Qxh5 $2 35. g4 $18) 35. Rh1 Rf8 36. Rf1 Kh8 (36... Qxh5 $2 37. Nxe6 Qe8 38. Nxf8 $18) 37. Rf2 (37. Rh1 $11) 37... Rg8 ({Wrong is} 37... Qxh5 $2 38. Nxe6 (38. g4 Qh4 $11) 38... Qe8 39. Nxf8 $18) ({Black should try} 37... g4 $1 $15) 38. Rfd2 $11 Nf4+ $4 {[%mdl 8192]} (38... Qxh5 39. g4 Nf4+ 40. Kg1 Qh4 41. gxf5 Qg3+ 42. Kf1 Qh3+ 43. Kg1 Qg3+) 39. gxf4 $18 gxf4+ 40. Kf1 Qxh5 {[#] ( -> ...Qh1+)} 41. Rd7 Qh1+ 42. Ke2 Rg2+ 43. Kd3 {Strongly threatening Rxg2.} Qb1+ 44. Kc3 ({But not} 44. Kc4 $2 Qc1+ 45. Qc2 Qxc2+ $19) 44... Qa1+ 45. Kb3 Rg8 46. Nxe6 {Weighted Error Value: White=0.12/Black=0.56} (46. Re7 $142 Qxe5 47. Rdd7 Rg3 48. Re8+ Rg8 49. Rxe6 {[%mdl 64] Double Attack} Rg7 50. Rxe5 Rxd7 51. Re8+ Kg7 52. Qxf5 Rd3+ 53. Nxd3 b5 54. Nxf4 h5 55. Qg6#) 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "4.9"] [White "Badelka, Olga"] [Black "Praggnanandhaa R"] [Result "0-1"] [ECO "E67"] [WhiteElo "2433"] [BlackElo "2608"] [Annotator "TA"] [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"] {[%evp 20,92,38,32,37,37,67,62,64,62,86,72,82,45,79,50,55,49,91,59,107,26,30, -23,-33,-37,-49,-229,-220,-315,-335,-335,-317,-394,-397,-395,-380,-581,-519, -441,-378,-367,-343,-354,-336,-722,-722,-702,-675,-580,-414,-404,-397,-518, -238,-491,-353,-672,-689,-579,-530,-527,-461,-672,-541,-6261,-1019,-5748,-6278, -2995,-2627,-29996,-29997,-29997,-15]} 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. g3 d6 5. Bg2 O-O 6. Nc3 Nbd7 7. O-O e5 8. e4 Re8 9. Qc2 exd4 10. Nxd4 Nc5 {10...c6 is the modern continuation.} 11. Rd1 Ng4 $5 {[%mdl 4] A promising side line. E67: King's Indian: Fianchetto: 6...Nbd7.} 12. b3 {[#]} Ne6 $146 ({Predecessor: } 12... Ne5 13. Ba3 Bd7 14. h3 h5 15. f4 Nc6 16. Nxc6 bxc6 17. Bxc5 dxc5 18. e5 Qe7 19. Qf2 {1-0 (35) Saduakassova,D (2460)-Lagno,K (2547) Riadh 2017}) 13. Nxe6 Bxe6 {White is slightly better.} 14. Bb2 Nf6 15. Rac1 Nd7 16. Ba3 Qc8 17. Nd5 a5 18. f4 f5 19. Re1 fxe4 20. Bxe4 (20. Qxe4 $6 a4 $11) ({White should try } 20. Rxe4 $16 a4 21. Rce1 (21. bxa4 Bxd5 22. cxd5 Rxe4 $16) 21... axb3 22. Qxb3 (22. axb3 Rxa3 23. Rxe6 Rxe6 $11)) 20... c6 $11 21. Nc3 (21. Ne3 $142) 21... Nc5 {And now ...Bd4+ would win.} 22. Bf3 Bf5 $36 {[%mdl 2048] Black is more active.} 23. Qd2 {Loses the game.} (23. Ne4 $1 $15) 23... Nd3 $19 24. Rxe8+ (24. Ne4 {might work better.} Nxc1 25. Qxc1) 24... Qxe8 25. g4 {[#]} Bd4+ $1 (25... Nxc1 26. gxf5 Nd3 27. Qxd3 $17) 26. Kg2 {[#]} Be3 $1 {[%mdl 64] Double Attack, Skewer} 27. Qd1 Nxf4+ ({Not} 27... Nxc1 28. gxf5 Bxf4 29. Bxc1 $11) (27... Bxc1 $2 28. Bxc1 Qe1 29. Qxe1 $19) 28. Kg3 (28. Kh1 $142 Nh3 29. Kg2 Nf4+ 30. Kh1) 28... Bd3 29. Bxd6 g5 30. Bxf4 gxf4+ 31. Kg2 Rd8 32. Ra1 $2 ( 32. Nd5 Qe5 33. Nxe3 fxe3 34. Bd5+ cxd5 35. Qxd3) 32... Bg6 33. Qf1 Rd2+ 34. Ne2 Qd7 35. Kh1 Bd3 36. Re1 Qg7 (36... Bc5 $142 {aiming for ...Qe7.} 37. Qg2 Qe7) 37. Qh3 $2 (37. Rd1 {was the only defense.}) 37... Qg5 {Strongly threatening ...Bf2.} 38. Qg2 $2 (38. Nc3 Rc2 39. Nd1) 38... Qh4 39. Rf1 h6 40. a4 Kg7 41. c5 (41. Ra1 $142) 41... Qg5 42. Qh3 Bxc5 (42... Bxe2 $142 43. Bxe2 Rxe2) 43. Nc3 Bxf1 44. Qxf1 Rf2 45. Qd3 {[#]} Rxh2+ $3 {[%mdl 512]} 46. Kxh2 Qh4+ {[%mdl 32768] Weighted Error Value: White=1.06/Black=0.42. Loss on time!?} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "4.10"] [White "Lei, Tingjie"] [Black "Yip, Carissa"] [Result "1-0"] [ECO "E90"] [WhiteElo "2505"] [BlackElo "2430"] [Annotator "ChessBase"] [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"] 1. d4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 2. c4 {[%emt 0:00:00]} g6 {[%emt 0: 00:00]} 3. Nc3 {[%emt 0:00:00]} Bg7 {[%emt 0:00:00]} 4. e4 {[%emt 0:00:01]} O-O {[%emt 0:00:00]} 5. Nf3 {[%emt 0:00:01]} d6 {[%emt 0:00:01]} 6. h3 {[%emt 0:00: 01]} e5 {[%emt 0:00:10]} 7. d5 {[%emt 0:00:03]} a5 {[%emt 0:00:03]} 8. Be3 { [%emt 0:00:01]} Na6 {[%emt 0:00:02]} 9. g4 {[%emt 0:00:03]} Nd7 {[%emt 0:00:10] } 10. a3 {[%emt 0:00:03]} Nac5 {[%emt 0:00:09]} 11. Rg1 {[%emt 0:00:03]} a4 { [%emt 0:00:08]} 12. Nd2 {[%emt 0:00:02]} c6 {[%emt 0:00:10]} 13. Qc2 {[%emt 0: 00:03]} Nb6 {[%emt 0:00:34]} 14. Be2 {[%emt 0:00:31]} Bd7 {[%emt 0:00:07]} 15. O-O-O {[%emt 0:00:43]} cxd5 {[%emt 0:00:12]} 16. exd5 {[%emt 0:00:56]} Rc8 { [%emt 0:00:25]} 17. h4 {[%emt 0:01:24]} Qxh4 {[%emt 0:02:47]} 18. Rh1 {[%emt 0: 00:02]} Qe7 {[%emt 0:00:03]} 19. Rh2 {[%emt 0:00:03]} f5 {[%emt 0:01:05]} 20. Rdh1 {[%emt 0:00:07]} fxg4 {[%emt 0:00:24]} 21. Rxh7 {[%emt 0:00:26]} Bf5 { [%emt 0:00:03]} 22. Qd1 {[%emt 0:00:18]} g5 {[%emt 0:03:28]} 23. R7h5 {[%emt 0: 01:00]} Nbd7 {[%emt 0:00:03]} 24. Rxg5 {[%emt 0:00:54]} Rf6 {[%emt 0:00:21]} 25. Qg1 {[%emt 0:01:10]} Rcf8 {[%emt 0:00:20]} 26. Qh2 {[%emt 0:01:32]} Kf7 { [%emt 0:01:25]} 27. Bxg4 {[%emt 0:00:23]} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "5.1"] [White "Yip, Carissa"] [Black "Zhu, Jiner"] [Result "0-1"] [ECO "C56"] [WhiteElo "2430"] [BlackElo "2459"] [Annotator "Shahid"] [PlyCount "38"] [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 0,38,28,28,28,28,17,7,4,-31,-17,-40,30,0,-21,-23,-3,-25,-24,0,0,-43,-27, -50,-29,-17,-9,-16,23,52,2,-34,72,58,59,-4,-35,-73,-86,-391,-363]} 1. e4 { [%emt 0:00:00]} e5 {[%emt 0:00:00]} 2. Nf3 {[%emt 0:00:00]} Nc6 {[%emt 0:00:00] } 3. d4 {[%emt 0:00:00]} exd4 {[%emt 0:00:00]} 4. Bc4 {[%emt 0:00:01]} Nf6 { [%emt 0:00:18]} 5. e5 {[%emt 0:00:03]} Ne4 {[%emt 0:00:03]} 6. Qe2 {[%emt 0:00: 25]} Nc5 {[%emt 0:00:04]} 7. O-O {[%emt 0:00:03]} Ne6 {[%emt 0:00:24]} 8. Rd1 { [%emt 0:00:14]} d5 {[%emt 0:00:08]} 9. exd6 {[%emt 0:00:19]} Bxd6 {[%emt 0:00: 02]} 10. c3 {[%emt 0:00:41]} O-O {[%emt 0:00:12]} 11. cxd4 {[%emt 0:00:01]} Qf6 {[%emt 0:00:58]} 12. Bxe6 {[%emt 0:01:21]} fxe6 {[%emt 0:00:47]} 13. Nc3 { [%emt 0:00:03]} e5 {[%emt 0:01:27]} 14. Ne4 {[%emt 0:00:13]} Qg6 {[%emt 0:00: 51]} 15. Nxd6 {[%emt 0:00:41]} cxd6 {[%emt 0:00:06]} 16. dxe5 {[%emt 0:00:25]} Bg4 {[%emt 0:00:58]} 17. Qc4+ {[%emt 0:00:36]} (17. Rxd6 Bxf3 18. Qxf3 Rxf3 19. Rxg6 hxg6 20. gxf3 Nxe5 21. f4) 17... d5 {[%emt 0:00:43]} 18. Rxd5 {[%emt 0:01: 21]} Be6 {[%emt 0:00:05]} 19. Ng5 {[%emt 0:02:34]} Rad8 {[%emt 0:00:15]} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "5.2"] [White "Praggnanandhaa R"] [Black "Lei, Tingjie"] [Result "1-0"] [ECO "D27"] [WhiteElo "2608"] [BlackElo "2505"] [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"] {[%evp 12,101,28,14,18,0,50,51,77,69,117,111,156,156,241,240,233,228,232,157, 211,121,127,122,112,108,103,68,152,148,158,148,420,418,352,147,757,334,476,467, 445,-118,-118,-150,-120,-442,-226,-225,-193,-177,20,18,211,189,483,307,809,808, 775,775,709,321,321,321,321,98,462,475,471,460,469,450,430,450,431,450,409,379, 515,498,578,526,568,541,615,557,629,582,774,733,841,812]} 1. d4 d5 2. c4 dxc4 3. e3 Nf6 4. Bxc4 e6 5. Nf3 c5 6. O-O a6 7. Nbd2 Nbd7 {D27: Queen's Gambit Accepted: Classical main line: 7 e4!? and 7 a4.} 8. e4 {[#]} cxd4 $146 (8... b5 $5 {[%CAl Rb5c4]} 9. e5 bxc4 10. exf6 gxf6 $11) ({Predecessor:} 8... b5 9. e5 bxc4 10. exf6 Nxf6 11. Nxc4 Be7 12. dxc5 Qxd1 13. Rxd1 Bxc5 14. Be3 Be7 15. Nb6 {1/2-1/2 (35) Petrov,N (2577)-Inarkiev,E (2661) Sochi 2020}) 9. e5 Ng4 { White is slightly better.} 10. Re1 Qc7 {[%CAl Rd7e5]} 11. Qe2 Bc5 {aiming for . ..d3!} 12. Bd3 $1 f5 (12... b6 $16 13. Qe4 {[%mdl 64] Double Attack} Ngxe5) 13. exf6 $18 Ndxf6 14. h3 Nh6 15. Nb3 Nf7 (15... Bb4 $16 {was called for.}) 16. Nbxd4 (16. Nfxd4 $6 Bxd4 17. Nxd4 O-O) ({Better is} 16. Bd2 $18) 16... Bxd4 $16 17. Nxd4 O-O 18. Bc4 (18. Nxe6 $2 Bxe6 19. Bxh7+ (19. Qxe6 $2 Rae8 $19) 19... Kxh7 $17) 18... Kh8 19. Be3 Nd5 (19... e5 $14) 20. Rac1 $36 {[%mdl 2048] Bxd5 is the strong threat. White is really pushing.} Qd6 21. Bd2 Re8 $2 {[%mdl 8192] [#]} (21... e5 $16) 22. Nf5 $1 $18 {[%mdl 512]} Qd8 {[#]} (22... Qd7 23. Nxg7) 23. Qd3 Bd7 $2 {[%mdl 8192] [#]} (23... Nf6 $16) 24. Qg3 Rg8 (24... Qf6 $142) 25. Bxd5 exd5 26. Nxg7 $2 {[#]} (26. Ne7) 26... d4 $1 $17 (26... Rxg7 $2 27. Bc3 $18) 27. Qd3 {Black must now prevent Nf5.} Rxg7 28. Bf4 $2 {[%mdl 8192]} ( 28. Qxd4 $17 Kg8 29. g4) 28... Qf6 (28... Bc6 $142 29. g3 Qd5 30. Rxc6 bxc6) 29. Bg3 $19 Bf5 30. Qf3 {Black should prevent Rc5.} Rag8 $2 (30... Ng5 $19 31. Qf4 d3) 31. Rc5 $1 $11 {[%CAl Rc5f5]} Nh6 {[#] Black is now going downhill.} ( 31... Rg5 $1 $11) 32. Be5 $1 $18 {[%CAl Re5f6]} Qf8 ({Don't blunder} 32... Rxg2+ $2 33. Qxg2 Qxe5 34. Rexe5 $18) (32... Qe7 33. Rc4 Bc8 34. Rxd4 Qg5) 33. Bxd4 Bd7 $2 (33... Qd6 34. Bxg7+ Kxg7) 34. Qxf8 Rxf8 35. Rg5 {[%mdl 64] Pin} Nf5 36. Bxg7+ (36. Rxg7 $142 Nxg7 37. Re7 {[%mdl 64] Double Attack}) 36... Nxg7 37. Re7 {[%csl Bd7,Bg7][%mdl 64] Double Attack} Ne6 38. Rh5 ({Inferior is} 38. Rxd7 Nxg5 39. Rxb7 Rg8 $11) (38. Re5 $18 {has better winning chances.} Rd8 39. R7xe6 Bxe6 40. Rxe6) 38... Bc8 {[%mdl 8192]} (38... Ng7 $16 {is a better chance.}) 39. Rexh7+ Kg8 40. Rh8+ Kg7 41. Rxf8 Nxf8 42. Rc5 Be6 43. b3 Kf6 44. f3 Nd7 45. Rc7 {White is clearly winning.} b6 46. Kf2 Nc5 47. Rc6 Nd7 48. g4 Ke5 49. Kg3 Bd5 50. f4+ Ke4 51. Rd6 {Weighted Error Value: White=0.57/Black=0. 85} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "5.3"] [White "Salimova, Nurgyul"] [Black "Badelka, Olga"] [Result "1/2-1/2"] [ECO "E04"] [WhiteElo "2397"] [BlackElo "2433"] [Annotator "Shahid"] [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 0,99,28,25,18,18,18,14,12,-36,-15,-16,-9,12,59,26,26,10,25,-26,-13,-63, 39,16,40,12,14,52,56,68,64,68,87,73,71,60,48,52,136,77,139,106,122,120,41,41, 37,37,0,0,57,45,45,45,87,83,132,171,208,182,150,151,179,149,225,99,111,150,150, 165,121,145,133,77,282,93,90,64,58,26,8,-59,-57,-65,-68,-73,-72,-105,-123,-97, -24,0,260,0,0,0,0,0,0,0,0,0]} 1. d4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 2. Nf3 {[%emt 0:00:02]} e6 {[%emt 0:00:02]} 3. g3 {[%emt 0:00:08]} d5 {[%emt 0:00: 12]} 4. c4 {[%emt 0:00:06]} dxc4 {[%emt 0:00:07]} 5. Bg2 {[%emt 0:00:04]} c6 { [%emt 0:00:33]} 6. O-O {[%emt 0:00:19]} b5 {[%emt 0:00:09]} 7. Ne5 {[%emt 0:00: 58]} Bb7 {[%emt 0:00:07]} 8. a4 {[%emt 0:00:55]} a6 {[%emt 0:00:05]} 9. b3 { [%emt 0:00:44]} cxb3 {[%emt 0:00:06]} 10. Qxb3 {[%emt 0:00:54]} Be7 {[%emt 0: 00:22]} 11. Bb2 {[%emt 0:00:14]} O-O {[%emt 0:00:18]} 12. Rc1 {[%emt 0:00:15]} Nd5 {[%emt 0:00:14]} 13. Nd2 {[%emt 0:01:38]} f6 {[%emt 0:02:42]} 14. Nd3 { [%emt 0:00:08]} Nd7 {[%emt 0:00:06]} 15. e4 {[%emt 0:00:16]} Nc7 {[%emt 0:00: 02]} 16. Nf4 {[%emt 0:00:44]} Kh8 {[%emt 0:00:21]} 17. Nxe6 {[%emt 0:00:11]} Nxe6 {[%emt 0:00:02]} 18. Qxe6 {[%emt 0:00:01]} c5 {[%emt 0:00:27]} 19. d5 { [%emt 0:00:34]} Ne5 {[%emt 0:00:28]} 20. Bxe5 {[%emt 0:00:41]} fxe5 {[%emt 0: 00:07]} 21. axb5 {[%emt 0:00:17]} Bc8 {[%emt 0:02:00]} 22. Qc6 {[%emt 0:00:04]} Bd7 {[%emt 0:00:18]} 23. Qb7 {[%emt 0:00:06]} Bxb5 {[%emt 0:00:02]} 24. Bf1 { [%emt 0:01:23]} Bg5 {[%emt 0:01:28]} 25. Rc2 {[%emt 0:00:25]} Qf6 {[%emt 0:00: 33]} 26. Nc4 {[%emt 0:00:27]} Rab8 {[%emt 0:00:31]} 27. Qc7 {[%emt 0:00:08]} Rfc8 $2 {[%emt 0:00:18]} (27... Bxc4 28. Bxc4 Qf3) 28. Qd6 {[%emt 0:00:25]} h5 {[%emt 0:00:32]} 29. Qxf6 {[%emt 0:00:03]} (29. h4 Bxc4 30. Qxf6 Bxf6 31. Bxc4) 29... Bxf6 {[%emt 0:00:02]} 30. Nd6 {[%emt 0:00:08]} Rc7 {[%emt 0:00:01]} 31. Rac1 {[%emt 0:00:05]} (31. Rb2) 31... Be7 {[%emt 0:00:05]} 32. Nf5 {[%emt 0:00: 03]} Bf8 {[%emt 0:00:02]} 33. d6 {[%emt 0:00:02]} Rd7 {[%emt 0:00:03]} 34. Rxc5 {[%emt 0:00:05]} g6 {[%emt 0:00:01]} 35. Rc8 {[%emt 0:00:11]} Rxc8 {[%emt 0:00: 16]} 36. Rxc8 {[%emt 0:00:02]} Kg8 {[%emt 0:00:05]} 37. Ne7+ {[%emt 0:00:07]} ( 37. Bxb5 axb5 38. Nh6+ Kh7 (38... Kg7 39. Rc7 $18) 39. Rc7 Rg7 40. d7 Be7 41. Nf7 $18) 37... Kf7 {[%emt 0:00:02]} 38. Nd5 {[%emt 0:00:04]} Bxd6 {[%emt 0:00: 03]} 39. Bh3 {[%emt 0:00:06]} Rb7 {[%emt 0:00:06]} 40. Rd8 {[%emt 0:00:06]} Bc5 {[%emt 0:00:03]} 41. Rh8 {[%emt 0:00:05]} Kg7 {[%emt 0:00:04]} 42. Rc8 { [%emt 0:00:00]} Bd4 {[%emt 0:00:03]} 43. Be6 {[%emt 0:00:09]} Bd3 {[%emt 0:00: 19]} 44. h4 {[%emt 0:00:07]} Rb1+ {[%emt 0:00:08]} 45. Kh2 {[%emt 0:00:02]} Bxf2 {[%emt 0:00:03]} 46. Rg8+ {[%emt 0:00:05]} (46. Rc7+ Kh6 (46... Kf8 47. Nf6) 47. Nf6 Bg1+ 48. Kg2) 46... Kh6 {[%emt 0:00:03]} 47. Rh8+ {[%emt 0:00:07]} Kg7 {[%emt 0:00:03]} 48. Rg8+ {[%emt 0:00:01]} Kh6 {[%emt 0:00:01]} 49. Rh8+ { [%emt 0:00:07]} Kg7 {[%emt 0:00:01]} 50. Rg8+ {[%emt 0:00:01]} 1/2-1/2 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "5.4"] [White "Saduakassova, Dinara"] [Black "Nihal Sarin"] [Result "1/2-1/2"] [ECO "D10"] [WhiteElo "2500"] [BlackElo "2620"] [Annotator "TA"] [PlyCount "57"] [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 13,57,28,27,0,0,0,0,0,0,0,0,0,0,0,0,-7,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Bf4 Nc6 5. e3 Nf6 6. Nc3 a6 7. Bd3 Bg4 8. Be2 {D10: Slav Defence: 3 cxd5 (without early Nf3) and 3 Nc3.} (8. Nge2 {feels hotter.} e6 9. O-O Bd6 10. Bxd6 Qxd6 11. Rc1) 8... Bxe2 {[#] The position is equal.} 9. Qxe2 $146 ({Predecessor:} 9. Ngxe2 e6 10. h3 Bd6 11. O-O O-O 12. Rc1 Rc8 13. Na4 Ne4 14. Bxd6 Qxd6 15. Nc5 Nxc5 16. Rxc5 Ne7 17. Rxc8 Rxc8 18. Qd2 h6 19. Rc1 Rc6 {1/2-1/2 (19) Ivanov,M (2500)-Bacrot, E (2500) Enghien les Bains 1997}) 9... e6 10. Nf3 Bd6 11. Bxd6 Qxd6 12. O-O O-O 13. Rfc1 Rfc8 14. h3 Nd7 15. Na4 Ne7 16. Qd2 (16. a3 {looks sharper.} Rc6 17. Qd1 Rac8 18. Ne1 Rxc1 19. Rxc1 Rxc1 20. Qxc1 b6 21. Nd3) 16... h6 17. Rxc8+ Rxc8 18. Rc1 Rxc1+ (18... Rc4 {seems wilder.} 19. Nc3 Qc7 20. Ne1 Nf6 21. Nd3 Qd8) 19. Qxc1 Qc6 20. Qxc6 Nxc6 $11 {[%mdl 4096] Endgame KNN-KNN} 21. Kf1 Kf8 22. Ke2 Ke7 23. a3 Kd6 24. Kd3 g5 25. Nc3 Nb6 26. Nd2 Nd7 27. Nf3 Nf6 28. Nd2 Nd7 29. Nf3 {An uneventful encounter. Weighted Error Value: White=0.02/ Black=0.00} 1/2-1/2 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "5.5"] [White "Liang, Awonder"] [Black "Mammadzada, Gunay"] [Result "1-0"] [ECO "A07"] [WhiteElo "2592"] [BlackElo "2443"] [Annotator "Shahid"] [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"] [TimeControl "600+5"] {[%evp 0,73,28,25,18,-9,44,44,46,18,23,8,-4,-19,50,0,-2,-4,15,27,35,19,17,-17, 46,41,62,57,48,-13,-2,-13,17,6,-1,-13,-15,0,-13,-77,-3,-49,6,4,4,2,18,-13,30, 25,29,46,47,0,35,14,53,5,217,215,190,114,93,81,263,106,283,533,1337,1545,29995, 29992,29993,29994,29999,-30000]} 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]} Bg4 {[%emt 0: 00:00]} 4. O-O {[%emt 0:00:00]} Nd7 {[%emt 0:00:01]} 5. c4 {[%emt 0:00:04]} Bxf3 {[%emt 0:00:33]} 6. Bxf3 {[%emt 0:00:02]} Ne5 {[%emt 0:00:01]} 7. Bg2 { [%emt 0:00:39]} Nxc4 {[%emt 0:00:24]} 8. d3 {[%emt 0:00:04]} Nd6 {[%emt 0:00: 11]} 9. e4 {[%emt 0:00:02]} e6 {[%emt 0:00:51]} 10. Nc3 {[%emt 0:00:12]} Ne7 { [%emt 0:00:37]} 11. h4 {[%emt 0:00:24]} Qd7 {[%emt 0:03:00]} 12. Be3 {[%emt 0: 00:27]} dxe4 {[%emt 0:00:19]} 13. dxe4 {[%emt 0:00:05]} Nc4 {[%emt 0:00:13]} 14. Qe2 {[%emt 0:00:07]} Nxe3 {[%emt 0:00:08]} 15. Qxe3 {[%emt 0:00:00]} Nc8 { [%emt 0:00:15]} 16. Rad1 {[%emt 0:00:06]} Qc7 {[%emt 0:00:03]} 17. Qg5 { [%emt 0:00:42]} h6 {[%emt 0:00:22]} 18. Qg4 {[%emt 0:00:01]} Nb6 {[%emt 0:00: 32]} 19. e5 {[%emt 0:01:06]} h5 {[%emt 0:02:30]} (19... Qxe5 20. Rfe1 h5 21. Qf3 Qf6) 20. Qg5 {[%emt 0:00:09]} Nd7 {[%emt 0:00:02]} 21. Rfe1 {[%emt 0:00:25] } g6 {[%emt 0:00:34]} 22. Qc1 {[%emt 0:02:44]} O-O-O {[%emt 0:00:20]} 23. Qf4 { [%emt 0:00:12]} Bg7 {[%emt 0:00:31]} 24. Qxf7 {[%emt 0:00:08]} Nxe5 {[%emt 0: 00:01]} 25. Qxe6+ {[%emt 0:00:08]} Kb8 {[%emt 0:00:01]} 26. Ne4 {[%emt 0:00:10] } Nd3 {[%emt 0:00:06]} 27. Re3 {[%emt 0:00:15]} Nxb2 $2 {[%emt 0:00:18]} (27... Ne5) 28. Rb1 {[%emt 0:00:32]} Rd1+ {[%emt 0:00:11]} 29. Rxd1 {[%emt 0:00:03]} Nxd1 {[%emt 0:00:00]} 30. Rb3 {[%emt 0:00:01]} Ka8 {[%emt 0:00:17]} 31. Nd6 { [%emt 0:00:14]} Rb8 {[%emt 0:00:09]} 32. Rxb7 {[%emt 0:00:11]} Rxb7 {[%emt 0: 00:01]} 33. Qe8+ {[%emt 0:00:01]} Qb8 {[%emt 0:00:02]} 34. Qxc6 {[%emt 0:00:02] } a5 {[%emt 0:00:04]} 35. Nc8 {[%emt 0:00:36]} Bd4 {[%emt 0:00:06]} 36. Qa6+ { [%emt 0:00:01]} Ba7 {[%emt 0:00:01]} 37. Nb6# {[%emt 0:00:01]} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "5.6"] [White "Yoo, Christopher Woojin"] [Black "Murzin, Volodar"] [Result "1-0"] [ECO "E90"] [WhiteElo "2455"] [BlackElo "2478"] [Annotator "ChessBase"] [PlyCount "83"] [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"] 1. d4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 2. Nf3 {[%emt 0:00:00]} g6 { [%emt 0:00:00]} 3. c4 {[%emt 0:00:00]} Bg7 {[%emt 0:00:00]} 4. Nc3 {[%emt 0:00: 00]} O-O {[%emt 0:00:02]} 5. Bg5 {[%emt 0:00:02]} d6 {[%emt 0:00:58]} 6. Qd2 { [%emt 0:00:03]} Nbd7 {[%emt 0:01:52]} 7. e4 {[%emt 0:00:04]} e5 {[%emt 0:00:05] } 8. Bd3 {[%emt 0:00:03]} Re8 {[%emt 0:00:12]} 9. O-O {[%emt 0:00:06]} Nf8 { [%emt 0:00:50]} 10. d5 {[%emt 0:01:27]} h5 {[%emt 0:00:06]} 11. h3 {[%emt 0:00: 20]} a5 {[%emt 0:00:19]} 12. a3 {[%emt 0:01:16]} a4 {[%emt 0:01:37]} 13. Bc2 { [%emt 0:01:00]} Bd7 {[%emt 0:00:04]} 14. Qd1 {[%emt 0:00:02]} N8h7 {[%emt 0:00: 21]} 15. Bxf6 {[%emt 0:00:26]} Nxf6 {[%emt 0:00:23]} 16. Re1 {[%emt 0:00:05]} Bh6 {[%emt 0:01:01]} 17. Bxa4 {[%emt 0:00:31]} Bxa4 {[%emt 0:00:10]} 18. Nxa4 { [%emt 0:00:00]} Kh8 {[%emt 0:00:09]} 19. Nc3 {[%emt 0:01:21]} Rg8 {[%emt 0:00: 08]} 20. Nh2 {[%emt 0:00:40]} Qd7 {[%emt 0:00:17]} 21. Qd3 {[%emt 0:00:08]} Qe7 {[%emt 0:00:51]} 22. b4 {[%emt 0:00:17]} Nd7 {[%emt 0:00:50]} 23. a4 {[%emt 0: 00:22]} Nb8 {[%emt 0:00:25]} 24. a5 {[%emt 0:01:04]} Na6 {[%emt 0:00:04]} 25. Rab1 {[%emt 0:00:01]} Qd7 {[%emt 0:00:12]} 26. Nf3 {[%emt 0:00:17]} Raf8 { [%emt 0:00:10]} 27. c5 {[%emt 0:00:12]} Nb8 {[%emt 0:00:42]} 28. cxd6 {[%emt 0: 00:19]} cxd6 {[%emt 0:00:03]} 29. b5 {[%emt 0:00:01]} Qe7 {[%emt 0:00:20]} 30. a6 {[%emt 0:00:27]} Nd7 {[%emt 0:00:01]} 31. axb7 {[%emt 0:00:28]} Nc5 { [%emt 0:00:02]} 32. Qc4 {[%emt 0:00:01]} f5 {[%emt 0:00:06]} 33. b6 {[%emt 0: 00:17]} Rb8 {[%emt 0:00:14]} 34. Qb5 {[%emt 0:00:25]} Rxb7 {[%emt 0:00:05]} 35. Qc6 {[%emt 0:00:04]} f4 {[%emt 0:00:09]} 36. Nb5 {[%emt 0:00:16]} Rd8 {[%emt 0: 00:04]} 37. Nd2 {[%emt 0:00:07]} g5 {[%emt 0:00:03]} 38. Nc4 {[%emt 0:00:06]} Bf8 {[%emt 0:00:02]} 39. Nbxd6 {[%emt 0:00:12]} Rxd6 {[%emt 0:00:09]} 40. Qxc5 {[%emt 0:00:01]} Rd8 {[%emt 0:00:09]} 41. Qxe7 {[%emt 0:00:05]} Bxe7 {[%emt 0: 00:02]} 42. Nxe5 {[%emt 0:00:06]} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "5.7"] [White "Shuvalova, Polina"] [Black "Abdusattorov, Nodirbek"] [Result "0-1"] [ECO "E20"] [WhiteElo "2476"] [BlackElo "2627"] [Annotator "TA"] [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"] {[%evp 10,72,0,0,0,0,1,8,12,9,9,-36,-33,-96,-70,-70,-65,-65,-58,-97,-97,-97, -97,-98,-98,-108,-105,-110,-93,-139,-139,-128,-133,-137,-140,-138,-135,-141, -134,-137,-143,-143,-135,-151,-141,-146,-156,-190,-182,-203,-199,-193,-202, -533,-525,-624,-595,-640,-637,-653,-647,-992,-975,-1136,-1133]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Bb4+ 5. Nc3 dxc4 6. Bg2 Bd7 $5 {[%mdl 4] Leaves trodden paths. E20: Nimzo-Indian: 4 g3 and 4 f3.} 7. Ne5 Bc6 8. Nxc6 Nxc6 {The position is equal.} 9. Qa4 Nd5 {[#]} 10. Bd2 $146 ({Predecessor:} 10. a3 Ba5 11. Qxc4 O-O 12. b4 Nxc3 13. Bxc6 bxc6 14. Qxc3 Bb6 15. Be3 Qd5 16. O-O { 1-0 (36) Kiselev,M (2152)-Kozlov,S (1886) Voronezh 2013}) 10... O-O 11. a3 {[#] } (11. e3 $15) 11... Nb6 $1 12. Qd1 Be7 $36 {[%mdl 2048] Black has some pressure.} 13. e3 Na5 14. Rc1 Nb3 15. Rc2 c5 16. dxc5 Nxc5 17. O-O Qd3 18. Qb1 Rad8 19. Nb5 {[#]} Nb3 $1 {[%CAl Rb3d2]} 20. Bc3 Na4 21. Nd4 Nxc3 ({Don't take } 21... Nxd4 22. exd4 b5 23. Rd1 $17) 22. Rxc3 Qxb1 ({Avoid the trap} 22... Nxd4 $2 23. Rxd3 Ne2+ 24. Kh1 $18) 23. Rxb1 Nxd4 24. exd4 b5 25. a4 a6 { [%CAl Ba7a6,Ba6b5][%mdl 32]} 26. axb5 axb5 27. Bc6 {[#]} Rb8 $1 ({Don't play} 27... Rxd4 28. Bxb5 Rd2 29. Bxc4 $17) 28. d5 Rb6 29. b3 Bf6 30. Rc2 c3 { aiming for ...Rd8.} 31. b4 $2 (31. Ra1) 31... Rd8 $19 {Black is clearly winning.} 32. Re1 Kf8 33. Rce2 g5 34. Kg2 Kg7 35. Rd1 exd5 36. Be8 d4 {Black took control after the opening. Weighted Error Value: White=0.43/Black=0.03} 0-1 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "5.8"] [White "Bjerre, Jonas Buhl"] [Black "Khademalsharieh, Sarasadat"] [Result "1/2-1/2"] [ECO "E15"] [WhiteElo "2550"] [BlackElo "2494"] [Annotator "ChessBase"] [PlyCount "45"] [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"] 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]} b6 {[%emt 0:00:03]} 4. g3 {[%emt 0:00:00]} Bb4+ {[%emt 0:00:02]} 5. Bd2 {[%emt 0:00:04]} Bxd2+ {[%emt 0:00:03]} 6. Qxd2 { [%emt 0:00:02]} Ba6 {[%emt 0:00:02]} 7. b3 {[%emt 0:00:02]} d5 {[%emt 0:00:07]} 8. cxd5 {[%emt 0:00:24]} exd5 {[%emt 0:00:16]} 9. Nc3 {[%emt 0:00:34]} O-O { [%emt 0:00:09]} 10. Bg2 {[%emt 0:00:01]} Nbd7 {[%emt 0:00:08]} 11. O-O { [%emt 0:00:17]} Re8 {[%emt 0:00:08]} 12. Rfd1 {[%emt 0:00:51]} Ne4 {[%emt 0:01: 00]} 13. Nxe4 {[%emt 0:00:26]} dxe4 {[%emt 0:00:01]} 14. Ne1 {[%emt 0:00:45]} Bb7 {[%emt 0:01:11]} 15. Nc2 {[%emt 0:00:25]} c5 {[%emt 0:01:40]} 16. Ne3 { [%emt 0:01:00]} Qf6 {[%emt 0:00:58]} 17. Bh3 {[%emt 0:01:48]} Rad8 {[%emt 0:00: 16]} 18. dxc5 {[%emt 0:00:38]} Nxc5 {[%emt 0:00:02]} 19. Qc2 {[%emt 0:00:03]} Bc8 {[%emt 0:00:57]} 20. Bg2 {[%emt 0:00:13]} Bb7 {[%emt 0:00:19]} 21. Bh3 { [%emt 0:01:26]} Bc8 {[%emt 0:00:08]} 22. Bg2 {[%emt 0:01:17]} Bb7 {[%emt 0:00: 02]} 23. Bh3 {[%emt 0:00:34]} 1/2-1/2 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "5.9"] [White "Gukesh D"] [Black "Abdumalik, Zhansaya"] [Result "1-0"] [ECO "A62"] [WhiteElo "2578"] [BlackElo "2472"] [Annotator "Shahid"] [PlyCount "77"] [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 0,77,28,24,16,20,37,17,10,10,3,2,8,10,23,25,34,11,27,12,71,24,58,103, 126,126,171,171,147,143,147,143,129,132,123,118,117,117,103,99,132,90,108,78, 85,122,193,128,124,84,102,80,137,101,121,85,215,138,187,187,334,360,397,399, 414,414,486,443,476,481,481,481,487,480,471,481,569,564,592,644]} 1. d4 { [%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 2. c4 {[%emt 0:00:01]} g6 {[%emt 0:00:00]} 3. g3 {[%emt 0:00:01]} c5 {[%emt 0:00:06]} 4. d5 {[%emt 0:00:48]} Bg7 {[%emt 0: 00:14]} 5. Bg2 {[%emt 0:00:06]} d6 {[%emt 0:00:01]} 6. Nc3 {[%emt 0:00:21]} O-O {[%emt 0:00:08]} 7. Nf3 {[%emt 0:00:09]} e6 {[%emt 0:00:19]} 8. O-O {[%emt 0: 00:13]} exd5 {[%emt 0:00:01]} 9. cxd5 {[%emt 0:00:09]} a6 {[%emt 0:00:06]} 10. a4 {[%emt 0:00:02]} Bf5 $2 {[%emt 0:00:02]} (10... Nbd7) 11. Nd2 {[%emt 0:00: 14]} Re8 {[%emt 0:00:35]} 12. e4 {[%emt 0:00:04]} Bg4 {[%emt 0:00:13]} 13. f3 { [%emt 0:00:26]} Bc8 {[%emt 0:00:03]} 14. Nc4 {[%emt 0:00:15]} Bf8 {[%emt 0:00: 26]} 15. Bf4 {[%emt 0:00:59]} Nh5 {[%emt 0:00:08]} 16. Be3 {[%emt 0:00:04]} Nd7 {[%emt 0:00:04]} 17. a5 {[%emt 0:00:10]} b5 {[%emt 0:00:12]} 18. axb6 {[%emt 0: 00:03]} Nxb6 {[%emt 0:00:01]} 19. Na5 {[%emt 0:00:13]} Nf6 {[%emt 0:00:18]} 20. Qd2 {[%emt 0:00:23]} Qc7 {[%emt 0:00:10]} 21. Rfc1 {[%emt 0:00:20]} Nfd7 { [%emt 0:00:38]} 22. f4 {[%emt 0:01:03]} Qd8 {[%emt 0:00:41]} 23. Nc6 {[%emt 0: 01:11]} Qc7 {[%emt 0:00:20]} 24. b3 {[%emt 0:00:21]} Bb7 {[%emt 0:00:10]} 25. Na5 {[%emt 0:00:57]} Bc8 {[%emt 0:00:44]} 26. Ra2 {[%emt 0:00:22]} Nf6 { [%emt 0:00:25]} 27. h3 {[%emt 0:00:05]} Bg7 {[%emt 0:00:20]} 28. b4 {[%emt 0: 00:31]} Nfd7 {[%emt 0:01:31]} 29. e5 {[%emt 0:00:47]} Rb8 {[%emt 0:00:47]} 30. Ne4 {[%emt 0:00:18]} dxe5 {[%emt 0:01:14]} 31. bxc5 {[%emt 0:00:09]} Nxd5 { [%emt 0:00:35]} 32. Qxd5 {[%emt 0:00:04]} Nf6 {[%emt 0:00:01]} 33. Qd6 { [%emt 0:00:12]} Qxd6 {[%emt 0:00:25]} 34. Nxd6 {[%emt 0:00:01]} Be6 {[%emt 0: 00:01]} 35. Nxe8 {[%emt 0:00:07]} Bxa2 {[%emt 0:00:02]} 36. Nxg7 {[%emt 0:00: 01]} Kxg7 {[%emt 0:00:03]} 37. fxe5 {[%emt 0:00:01]} Nd7 {[%emt 0:00:01]} 38. c6 {[%emt 0:00:02]} Nxe5 {[%emt 0:00:04]} 39. c7 {[%emt 0:00:02]} 1-0 [Event "Polgar Challenge 2021"] [Site "Online"] [Date "2021.04.04"] [Round "5.10"] [White "Keymer, Vincent"] [Black "Mendonca, Leon Luke"] [Result "1-0"] [ECO "E14"] [WhiteElo "2591"] [BlackElo "2549"] [Annotator "Shahid"] [PlyCount "105"] [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 0,105,28,16,16,18,18,20,12,13,30,-6,-8,8,23,23,22,22,17,26,26,14,38,11, 13,-2,0,7,0,-8,0,0,43,40,19,5,42,33,40,45,54,45,50,20,51,32,67,44,44,22,30,34, 56,63,48,42,25,0,118,119,127,134,127,132,129,87,67,91,100,100,100,94,104,104, 93,129,104,122,149,161,133,146,186,189,210,197,210,147,152,149,138,154,165,142, 167,140,235,194,221,166,536,540,603,700,768,790,1018,865]} 1. Nf3 {[%emt 0:00: 00]} Nf6 {[%emt 0:00:00]} 2. c4 {[%emt 0:00:04]} e6 {[%emt 0:00:53]} 3. Nc3 { [%emt 0:00:03]} d5 {[%emt 0:00:01]} 4. e3 {[%emt 0:00:01]} Be7 {[%emt 0:00:13]} 5. b3 {[%emt 0:00:01]} O-O {[%emt 0:00:08]} 6. Bb2 {[%emt 0:00:01]} b6 { [%emt 0:00:02]} 7. cxd5 {[%emt 0:00:10]} exd5 {[%emt 0:00:03]} 8. d4 {[%emt 0: 00:02]} Bb7 {[%emt 0:00:18]} 9. Bd3 {[%emt 0:00:01]} Nbd7 {[%emt 0:00:27]} 10. O-O {[%emt 0:00:02]} a6 {[%emt 0:00:02]} 11. Ne2 {[%emt 0:00:04]} Re8 {[%emt 0: 00:07]} 12. Ng3 {[%emt 0:00:05]} Bd6 {[%emt 0:00:23]} 13. Nf5 {[%emt 0:00:09]} Bf8 {[%emt 0:00:05]} 14. Ne5 {[%emt 0:00:09]} g6 {[%emt 0:02:15]} 15. Ng3 { [%emt 0:00:04]} Bg7 {[%emt 0:00:49]} 16. f4 {[%emt 0:00:44]} c5 {[%emt 0:00:26] } 17. Qf3 {[%emt 0:00:16]} Qc7 {[%emt 0:00:39]} 18. Rac1 {[%emt 0:00:22]} Rac8 {[%emt 0:00:09]} 19. Qe2 {[%emt 0:01:21]} a5 {[%emt 0:01:32]} 20. Bb5 {[%emt 0: 00:34]} Re7 {[%emt 0:00:06]} 21. Rfd1 {[%emt 0:00:14]} Qd8 {[%emt 0:00:45]} 22. a4 {[%emt 0:00:36]} cxd4 {[%emt 0:00:26]} 23. exd4 {[%emt 0:00:10]} Nf8 { [%emt 0:00:19]} 24. Rxc8 {[%emt 0:01:03]} Qxc8 {[%emt 0:00:03]} 25. f5 { [%emt 0:00:25]} Rc7 {[%emt 0:00:36]} 26. Bd3 {[%emt 0:00:18]} Qd8 {[%emt 0:01: 07]} 27. Rf1 {[%emt 0:00:11]} Qd6 {[%emt 0:00:01]} 28. h4 {[%emt 0:00:34]} Ne4 {[%emt 0:00:15]} 29. Nxe4 {[%emt 0:00:27]} dxe4 {[%emt 0:00:02]} 30. Bxe4 { [%emt 0:00:00]} Bxe4 {[%emt 0:00:00]} 31. Qxe4 {[%emt 0:00:01]} Qb4 {[%emt 0: 00:05]} 32. fxg6 {[%emt 0:00:32]} hxg6 {[%emt 0:00:03]} 33. Qd5 {[%emt 0:00:23] } Bxe5 $2 {[%emt 0:00:06]} (33... Ne6 34. Nxf7 Bxd4+ 35. Bxd4 Qxd4+ 36. Qxd4 Nxd4) 34. Qxe5 {[%emt 0:00:06]} Re7 {[%emt 0:00:03]} 35. Qf6 {[%emt 0:00:16]} Nh7 {[%emt 0:00:12]} 36. Qf3 {[%emt 0:00:04]} Qd2 {[%emt 0:00:05]} 37. Rf2 { [%emt 0:00:43]} Qe1+ {[%emt 0:00:06]} 38. Kh2 {[%emt 0:00:03]} Qe3 {[%emt 0:00: 04]} 39. d5 {[%emt 0:00:36]} Qxf3 {[%emt 0:00:11]} 40. Rxf3 {[%emt 0:00:00]} Rd7 {[%emt 0:00:03]} 41. Rc3 {[%emt 0:00:09]} f6 {[%emt 0:00:06]} 42. Rc6 { [%emt 0:00:19]} Rxd5 {[%emt 0:00:04]} 43. Bxf6 {[%emt 0:00:05]} b5 {[%emt 0:00: 08]} 44. Bc3 {[%emt 0:00:28]} Nf8 {[%emt 0:00:01]} 45. Rc7 {[%emt 0:00:12]} Ne6 {[%emt 0:00:05]} 46. Re7 {[%emt 0:00:11]} Nd4 {[%emt 0:00:09]} 47. axb5 { [%emt 0:00:14]} Nf5 {[%emt 0:00:04]} 48. Rb7 {[%emt 0:00:21]} Rd3 {[%emt 0:00: 01]} 49. Rc7 {[%emt 0:00:11]} Rd5 {[%emt 0:00:04]} 50. b6 {[%emt 0:00:06]} Nd6 {[%emt 0:00:11]} 51. Rd7 {[%emt 0:00:14]} Rc5 {[%emt 0:00:05]} 52. Rxd6 { [%emt 0:00:05]} Rxc3 {[%emt 0:00:05]} 53. Rd8+ {[%emt 0:00:01]} 1-0