[Event "FIDE Chesscom Womens Speed 2021"] [Site "Online"] [Date "2021.06.12"] [Round "1.20"] [White "Assaubayeva, Bibisara"] [Black "Koneru, Humpy"] [Result "1-0"] [ECO "D35"] [WhiteElo "2634"] [BlackElo "2564"] [Annotator "Roiz,M"] [PlyCount "65"] [EventDate "2021.05.25"] [EventType "k.o."] [EventCountry "NET"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 12,65,18,17,22,39,35,18,14,14,14,14,34,27,22,12,22,16,81,88,92,84,76,85, 103,103,358,109,107,102,113,123,133,131,161,165,172,175,273,276,370,312,356, 192,372,372,510,505,5716,5716,5706,5614,4902,4825,2019,1395]} 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 c5 7. Rb1 $1 {[%csl Rb2,Gc2,Rc3, Gd3,Rd4,Re3,Ge4,Rf2,Gf3,Gg2][%CAl Ge4d5,Gc6b7,Gc6b5,Gd5c4,Gf1b5,Gb1b7,Gd4e5, Gf6g7,Gf6g5,Ge5f4,Gc1g5,Gd4c5,Gb6a7,Gb6a5,Gc5b4][%mdl 4] is recently more successful than 7.Nf3.} (7. a3 {Quite a rare continuation. White is just trying to keep as many pieces on the board as possible!} cxd4 (7... Be7 8. Nf3 O-O 9. Bd3 Nc6 10. Bb2 b6 11. O-O cxd4 12. cxd4 Bb7 13. Qe2 Rc8 14. Rad1 Na5 15. d5 exd5 16. exd5 $36 {1-0 Bocharov,D (2582)-Mozharov,M (2459)/St Petersburg RUS 2011 (26)}) 8. cxd4 e5 $5 {Probably that move came as a real surprise for Radoslaw.} 9. Nf3 {The best attempt to fight for the opening advantage.} (9. dxe5 Qa5+ 10. Bd2 Qxe5 11. Bd3 Bc5 (11... Bg4 $5) 12. Nf3 Qe7 13. O-O Nc6 $11) (9. d5 Bd6 10. Nf3 Nd7 11. Be2 O-O 12. O-O Nc5 $11 {1/2 Martinovic,S (2496)-Saric,A (2523)/Zagreb CRO 2012 (38)} 13. Bb2 Qe7 14. Nd2 b5 15. Bc3 Bd7 16. Rb1 Na4 17. Ba1 a6 18. Bg4 Rac8 19. Bxd7 Qxd7 20. Rb3 f6 21. Rg3 Rc5 22. Nb3 Rc4 23. Nd2 Rc5 24. Nb3 Rc4 25. Nd2 Rc7 26. Nf3 Rc4 {1/2-1/2 (26) Ivanov,S (2570)-Golod,V (2535) Beersheba 1998 CBM 064 [Golod,V]}) 9... exd4 10. Qxd4 $146 {My strong opponent chooses the safest continuation. To be honest, I had mainly expected that move during my preparation.} (10. Bb5+ Bd7 11. Bxd7+ Qxd7 12. Qxd4 Qxd4 13. Nxd4 Bc5 14. Nb5 Na6 $11) ({However, I believe the most challenging way was connected with a pawn sacrifice:} 10. Bc4 $5 Nc6 11. O-O Be7 12. Bd5 O-O 13. Rb1 $44 Bf6 14. Bf4 Re8 {1/2 Lerner,K (2494) -Golod,V (2538)/Ramat Aviv 2004/CBM 102 ext}) 10... Qxd4 11. Nxd4 Bc5 {The most natural developing move.} (11... Be7 12. Be3 O-O 13. Be2 Bd7 14. O-O Nc6 15. Nb5 a6 16. Nc7 Rac8 17. Nd5 $14) 12. Nb5 (12. Bb2 O-O 13. Rc1 Bb6 14. Bc4 Rd8 15. Bd5 Na6 16. Ke2 Nc7 17. Bb3 Ne6 18. Nxe6 Bxe6 19. Bxe6 fxe6 $11) 12... Na6 13. Bf4 (13. Bc4 O-O 14. Ke2 Re8 15. f3 Be6 16. Bxe6 Rxe6 17. Be3 Re7 $1 ( 17... Bxe3 18. Kxe3 b6 19. a4 $14) 18. g4 Bxe3 19. Kxe3 Nc7 $11) 13... O-O 14. Bd3 {Only this somewhat provocative move was ''new'' for me over the board. The bishop looks a bit vulnerable there.} ({My home preparation was mainly based on:} 14. Bc4 Be6 (14... Re8 $5 15. Bd5 Bd7 16. Nd6 Bxd6 17. Bxd6 Rad8 18. O-O (18. Bxb7 Bc8 19. Bxc8 Rxe4+ 20. Kf1 Rxd6 $11) 18... Be6 19. Bxe6 Rxd6 20. Bd5 Nc5 21. Rac1 b6 $11) 15. Bxe6 fxe6 16. Bg3 Rac8 17. O-O Bb6 18. Nd6 Rc2 19. Nxb7 Nc5 20. Nxc5 Bxc5 21. a4 Bd4 22. Rab1 Re2 $11) 14... Be6 ({There was nothing wrong with attacking it immediately:} 14... Rd8 15. Bc4 Bd7 16. Ke2 Be7 17. Rab1 Nc5 18. f3 b6 $11) 15. Ke2 {Black is by no means not worse and has a lot of good options. As usually happens with me, such a situation may make me feel too relaxed :)} Rfd8 (15... Bb6 16. Nd6 Nc5 17. Bc2 Bc7 18. Rhd1 f6 19. Rab1 b6 $11) (15... Rad8 16. Rhd1 Be7 17. Rac1 Nc5 18. Nxa7 Nxd3 19. Rxd3 Rxd3 20. Kxd3 Bxa3 $11) 16. Rhd1 Bb6 $6 {That is not a real mistake, but I could play much more actively.} ({I can hardly understand why I rejected the most natural} 16... Rd7 17. Be3 Rad8 18. Rac1 Bxe3 19. Kxe3 Bb3 20. Rd2 b6 21. e5 Nc5 22. Rc3 $11 {and only White has to be slightly careful.}) 17. Rac1 Nc5 { Somehow I have overestimated the power of his light-squared bishop.} 18. Nd6 ( 18. Be3 Nxd3 19. Rxd3 Rxd3 20. Kxd3 Bd7 21. Nd6 (21. a4 Bxb5+ 22. axb5 Bxe3 23. Kxe3 a5 $11) 21... Bc6 $11) 18... Nxd3 19. Rxd3 Rd7 20. Be3 {Only here did I realise that White is running no risks with such a strong knight on d6.} Bd8 $1 {It's important to keep the bishops on the board.} (20... Bxe3 $6 21. Kxe3 Kf8 22. f4 f6 23. f5 Bg8 24. g4 Rad8 25. Rcd1 $14) 21. Nb5 $1 {That strong retreat poses some concrete problems. White's pieces are very active at the moment, while the Pa7 is under pressure.} (21. f4 Be7 22. e5 g6 23. h3 f6 24. Rcd1 fxe5 25. fxe5 b6 $11) 21... Rxd3 (21... a6 $6 22. Nd4 b5 23. Nxe6 Rxd3 24. Kxd3 fxe6 25. Rc6 Kf7 26. Bc5 $14) (21... b6 $6 22. Nd4 Be7 23. Rc6 $14) 22. Kxd3 Bd7 { After long meditation, I decided to enter a rook ending with a pawn down.} ({ My main choice was between the text and:} 22... a6 23. Nc7 Bxc7 (23... Rc8 24. Nxe6 Rxc1 25. Nxd8 $14) 24. Rxc7 b5 25. Bd4 Rc8 26. Ra7 Rc6 27. Ra8+ Bc8 28. f4 $14) ({But the simplest was} 22... b6 $1 23. Nc7 Rc8 24. Nxe6 Rxc1 25. Bxc1 ( 25. Nxd8 Rd1+ 26. Bd2 Ra1 $11) 25... fxe6 26. Kc4 a6 $11) 23. Nxa7 Kf8 (23... f5 $5 24. exf5 Bxf5+ 25. Ke2 Bd7 $11) 24. Ke2 b6 25. Nc6 Bxc6 26. Rxc6 Rxa3 27. Bxb6 {White had nothing better.} Bxb6 28. Rxb6 Ra2+ 29. Kf3 Ra3+ 30. Kf4 Ra2 31. Kg3 h5 $1 $11 {Black is just in time to set up an ideal pawn chain for this ending. Our match situation wasn't clear at that moment, so my opponent was forced to play till the end.} 32. h4 g6 33. Rb3 Kg7 34. Kf3 Rc2 35. g3 Ra2 36. Ke3 Rc2 37. Rd3 Ra2 {White cannot make any progress without exchanging the pawns.} 38. Rd2 Ra3+ 39. Kf4 Rb3 40. f3 Ra3 41. Rd5 Ra1 42. g4 hxg4 43. Kxg4 { All the following moves have no value, as they don't change the character of the position.} (43. fxg4 Rf1+ 44. Kg3 Rg1+ 45. Kf3 Rf1+ 46. Ke3 Rg1 $11) 43... Rg1+ 44. Kf4 Rh1 45. Kg3 Kf6 46. Rd6+ Kg7 47. Rd2 Rg1+ 48. Rg2 Re1 49. Rh2 Ra1 50. h5 gxh5 51. Rxh5 Kg6 52. Rb5 Ra3 53. Rb6+ f6 54. Kf4 Ra5 55. Rd6 Rb5 56. Ke3 Rb3+ 57. Rd3 Rb4 58. Rc3 Ra4 59. Rd3 Rb4 60. f4 Ra4 61. Kf3 Rb4 62. Ra3 Rc4 63. Ra6 Kf7 64. Ra7+ Kf8 65. Rh7 Ra4 66. Rb7 Rc4 67. Rb6 Kf7 68. Rb7+ Kf8 69. f5 Rc1 70. Ke3 Rc4 71. Kd3 Ra4 72. Rc7 Ke8 73. Rc4 Ra6 74. Kd4 Kd7 75. Rb4 ({ After} 75. e5 fxe5+ 76. Kxe5 Ke7 {We have a classical ''Philidor position''}) 75... Rd6+ 76. Kc5 Rc6+ ({Another possibility was} 76... Ra6 77. Rb7+ Ke8 78. Rb6 Ra5+ 79. Kd6 Re5 80. Rb4 Kf7 $11) 77. Kd4 ({Or} 77. Kb5 Rc1 78. Rc4 Ra1 79. Kc5 Ra5+ 80. Kd4 Ra1 81. Rb4 Rd1+ 82. Kc5 Rc1+ 83. Rc4 Re1 84. Rd4+ Ke7 $11) 77... Rd6+ 78. Ke3 Ke7 79. Rb7+ Ke8 80. Kf4 Rd1 81. Kg4 Rg1+ 82. Kf4 Re1 83. Rb6 Ke7 84. Rb7+ Ke8 85. Rc7 {1/2-1/2 (85) Wojtaszek,R (2733)-Roiz,M (2618) Eilat 2012 CBM 151 [Roiz,M]}) ({A well known theoretical line starts with} 7. Nf3 cxd4 (7... Be7 8. Bb5+ Bd7 9. Bd3 O-O 10. O-O Nc6 11. a3 Na5 12. Rb1 Rc8 13. Ne5 Be8 14. Qg4 Kh8 15. Bb2 f6 16. Nf3 e5 17. dxe5 f5 18. exf5 Qxd3 19. f6 gxf6 20. Qxc8 Rg8 21. Qe6 Bc6 22. Ne1 Qxb1 23. Qxe7 f5 24. Qf6+ Rg7 {1-0 (24) Khurtsidze,N (2434)-Kuzmin,G (2527) Moscow 2002 CBM 088 [Tsesarsky,I]}) 8. cxd4 Bb4+ 9. Bd2 Bxd2+ 10. Qxd2 O-O 11. Bc4 (11. Bd3 Nc6 12. Qc3 Bd7 13. Rb1 Rc8 14. Qd2 Be8 15. d5 exd5 16. exd5 Ne7 17. d6 Ng6 18. Bxg6 hxg6 19. O-O b6 20. Rfe1 Rc5 21. Rbc1 Bc6 22. Rxc5 bxc5 23. Ne5 Qa8 24. f3 Rd8 25. Nxf7 {1-0 (25) Jussupow,A (2655)-Van der Sterren,P (2605) Amsterdam 1994 CBM 043 [Jussupow,A]} ) (11. Rd1 b6 12. h4 Bb7 13. Bd3 Nc6 14. Bb1 Ba6 15. e5 Qe7 16. h5 h6 17. Rh4 Rfd8 18. Qc2 Qb4+ 19. Rd2 Kf8 20. Qh7 Rac8 21. Bd3 Bxd3 22. Qxd3 Qa5 23. Kf1 Nb4 24. Qb1 Rc3 25. Kg1 Qa3 26. Kh2 Kg8 27. Rh3 Nd5 28. Rc2 Rdc8 29. Rxc3 Qxc3 30. Qe4 Qc1 31. Nh4 Qg5 32. g3 Qd2 33. Qf3 Rc2 34. Kg1 Qe1+ 35. Kg2 Ne3+ { 0-1 (35) Kozul,Z (2640)-Golod,V (2554) Izmir 2004 CBM 104 [Golod,V]}) 11... Nc6 ({or} 11... Nd7 12. O-O b6 13. a4 (13. Rad1 Bb7 14. Rfe1 Rc8 15. Bb3 Re8 16. d5 exd5 17. exd5 Rxe1+ 18. Rxe1 Nf6 19. d6 Bxf3 20. gxf3 Rc6 21. d7 a6 22. Re7 { 1-0 (22) Illescas Cordoba,M (2607)-Lopez Martinez,J (2505) Lorca 2005 CBM 111 [Mikhalevski,V]}) 13... Bb7 14. Bd3 e5 15. Qe3 exd4 16. Nxd4 Nc5 17. Bc2 Re8 18. f3 Qf6 19. a5 Rad8 20. Rfd1 Ba6 21. axb6 axb6 22. Ba4 Nxa4 23. Rxa4 b5 24. Rb4 Rd7 25. Rc1 Red8 26. e5 Qb6 27. Rc6 Qa7 28. Nf5 Qxe3+ 29. Nxe3 Ra8 30. Kf2 g6 31. h4 h5 32. e6 fxe6 33. Rxe6 Kh7 34. Rf4 Bc8 35. Rb6 Ra2+ 36. Kg3 Re2 37. Re4 Bb7 38. Nd5 Rxe4 39. Nf6+ Kg7 40. Nxd7 Re7 41. Nb8 Rc7 42. Rxb5 Kf6 43. Rb2 Kf5 44. Rb6 Re7 45. Rb5+ Kf6 46. Kf4 Rc7 47. Rb6+ Kg7 48. Rd6 Rc4+ 49. Kg3 Rc7 50. Rd7+ Rxd7 51. Nxd7 Ba6 52. Nc5 Bf1 53. Ne4 Kf7 54. Nd2 Bd3 55. Kf4 Ke6 56. Kg5 Kf7 57. Nb3 Bf1 58. g3 Kg7 59. Nd4 Bc4 60. f4 Bd3 61. f5 gxf5 62. Nxf5+ Kh7 63. Ne3 {1-0 (63) Carlsen,M (2855)-Kramnik,V (2812) Paris 2016 CBM 173 [Sadorra,J]}) (11... b6 12. O-O Bb7 13. Rfe1 Nd7 14. a4 Rc8 15. Bd3 e5 16. d5 Nc5 17. Bc4 f6 18. Nh4 Qd7 19. Qe2 g6 20. a5 Qd6 21. h3 Rb8 22. Nf3 Kg7 23. Nd2 f5 24. axb6 axb6 25. Ra7 fxe4 26. Nxe4 Nxe4 27. Qxe4 Rf4 28. Qe2 Kh8 29. Bb3 Rb4 30. Qb2 Kg8 31. Qa3 {1-0 (31) Gulko,B (2643)-Lima,D (2525) Istanbul 2000 EXT 2001 [Tsesarsky,I]}) 12. O-O b6 13. d5 Na5 14. Bd3 exd5 15. e5 Qe7 16. Rae1 Nc4 17. Qf4 h6 18. h4 Qe6 19. Nd4 Qg4 20. Qxg4 Bxg4 21. f3 Bd7 22. e6 fxe6 23. Nxe6 Bxe6 24. Rxe6 Rae8 25. Rfe1 Rxe6 26. Rxe6 Kf7 27. Rc6 Ne5 28. Rc7+ Kf6 29. Bb5 Rf7 30. Rc8 Ke6 31. Kf2 Kd6 32. Ke3 Rc7 33. Rxc7 Kxc7 34. f4 Nc6 35. g4 Ne7 36. g5 hxg5 {1/2-1/2 (36) Komljenovic,D (2460)-Cifuentes Parada,R (2515) Linares 1997 CBM 058 [Tsesarsky,I]}) 7... cxd4 {D35: Queen's Gambit Declined: Exchange Variation.} (7... Be7 8. Nf3 O-O 9. Bc4 (9. h4 cxd4 10. cxd4 Nc6 11. h5 f5 12. exf5 Qa5+ 13. Bd2 Qxf5 14. Bc3 h6 15. Bd3 Qg4 16. Kf1 e5 17. d5 e4 18. dxc6 exf3 19. gxf3 Rxf3 20. Be2 Rxf2+ 21. Kxf2 Bc5+ 22. Kf1 Qf4+ 23. Bf3 bxc6 24. Be1 Be6 25. Bh4 Rf8 26. Kg2 Kh8 27. Rc1 Rf5 28. Rc3 Rd5 29. Bxd5 Bxd5+ 30. Rf3 Qg4+ 31. Bg3 Bd6 32. Rh3 Be7 33. Qe2 Be4 34. Qf2 a5 35. a4 c5 36. Rh1 Bf6 37. Re1 Bc6 38. Ree3 c4 39. Qe2 Qxh5 40. Qxc4 Bd7 41. Rd3 {1-0 (41) Karjakin,S (2763)-Kramnik,V (2800) Berlin 2018 CBM 184 [Marin,M]}) 9... Nc6 10. O-O b6 11. Be3 Bb7 12. Qe2 cxd4 13. cxd4 Rc8 14. Rfd1 Qc7 15. d5 Ne5 16. Bb5 exd5 17. exd5 Nxf3+ 18. Qxf3 Bc5 19. Rbc1 Qe7 20. Bf4 Bd6 21. Bc6 Bxf4 22. Qxf4 Bxc6 23. dxc6 Qc7 24. Rd6 Rcd8 25. Rcd1 h6 26. g3 Rxd6 27. Rxd6 Rc8 28. Qe5 b5 29. Qd5 Kh7 30. Qe4+ Kg8 31. Rd7 Qa5 32. c7 Rf8 33. Qe7 {1-0 (33) Anand,V (2767)-Hou,Y (2680) Wijk aan Zee 2018 CBM 183 [Fernandez,D]}) 8. cxd4 Be7 9. Nf3 O-O {The position is equal.} 10. Bc4 b6 11. O-O Bb7 12. Qe2 Nc6 13. Bb2 Rc8 14. Rbc1 {[#]} a6 $146 (14... Na5 $11 15. Ba6 Bxa6 16. Qxa6 Rxc1 17. Rxc1 Qd7) ({Predecessor:} 14... Qd6 15. d5 exd5 16. Bxd5 Qh6 17. e5 {1/2-1/2 (17) Portisch,F (2327)-Groszpeter,A (2518) Zalakaros 2006}) 15. Bxa6 $16 Bxa6 16. Qxa6 Nb4 17. Rxc8 Qxc8 18. Qxb6 Nxa2 $2 {[#]} (18... Qb8 $16 {is a better defense.} 19. Qxb8 Rxb8) 19. Qb3 $2 (19. Qa7 $18 {and White stays clearly on top.}) 19... Nb4 20. Ba3 Nc6 21. d5 exd5 22. exd5 Bxa3 23. dxc6 Bd6 24. Rc1 Qc7 (24... Bc7 $142 25. g3 g6) 25. g3 $18 Rd8 26. Qc4 h6 27. Kg2 (27. Nd4 $142) 27... Rb8 $2 (27... Qe7 28. Rb1 Rc8) 28. Nd4 Rb4 29. Qd5 {White is clearly winning.} Qb6 (29... Rb8 $142 30. Nb5 {[%mdl 64] Double Attack} Qa5) 30. Qxd6 Rxd4 {[#]} 31. Qxd4 $3 {[%mdl 576] Promotion} Qxd4 32. c7 Qe4+ 33. Kg1 { [%emt 0:00:56] Weighted Error Value: White=0.27/Black=0.} 1-0
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