[Event "Warsaw Najdorf Memorial 2023"] [Site "?"] [Date "2023.07.19"] [Round "9.13"] [White "Cherniaiev, Tykhon"] [Black "Kowalczyk, Rafal"] [Result "0-1"] [WhiteElo "2331"] [BlackElo "2173"] [Variant "Standard"] [TimeControl "-"] [ECO "D27"] [Opening "Queen's Gambit Accepted: Classical Defense, Rubinstein Variation"] [Termination "Unknown"] [Annotator "lichess.org"] 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 a6 6. a4 c5 7. O-O { D27 Queen's Gambit Accepted: Classical Defense, Rubinstein Variation } Nc6 8. dxc5 Qc7 9. b3 Bxc5 10. Bb2 O-O 11. Nc3 b6 12. Rc1 Bb7 13. Qe2 h6 14. h3 Na5 15. Nb1 Nxc4 16. Rxc4 Qe7 17. Ne5 Bd5 18. Rf4 Nd7 19. Nxd7 Qxd7 20. Rd1 Qe7 21. b4 Bd6 22. Rg4 f6 23. e4?! { (-0.32 → -1.20) Inaccuracy. Nc3 was best. } (23. Nc3 Bb3) 23... Bb3 24. Rf1?! { (-1.24 → -2.17) Inaccuracy. Rc1 was best. } (24. Rc1) 24... e5? { (-2.17 → -0.74) Mistake. Bxa4 was best. } (24... Bxa4 25. Rc1) 25. Bc3?! { (-0.74 → -1.63) Inaccuracy. Nc3 was best. } (25. Nc3 Qe6) 25... Be6 26. Rg3 Bxb4?! { (-1.28 → -0.59) Inaccuracy. Kh8 was best. } (26... Kh8) 27. Bb2? { (-0.59 → -2.11) Mistake. Bxb4 was best. } (27. Bxb4 Qxb4) 27... Bc5 28. Nc3 Rfd8 29. Nd5 Bxd5 30. exd5 Rxd5 31. Bc1 Kh8 32. Qh5 Qe8 33. Qf5 Qf7 34. Re1 Rad8 35. Qf3?! { (-2.84 → -3.87) Inaccuracy. Be3 was best. } (35. Be3 Qd7 36. Qg6 Rd6 37. Bxc5 bxc5 38. Rc3 Rc8 39. Kh2 c4 40. Rb1 Rdc6 41. a5 f5) 35... Bf8?! { (-3.87 → -2.84) Inaccuracy. e4 was best. } (35... e4 36. Qe2 f5 37. a5 bxa5 38. Bf4 a4 39. Rc3 Kh7 40. Rec1 Bd6 41. Bxd6 R8xd6 42. Qc2) 36. Kh2?! { (-2.84 → -3.69) Inaccuracy. Ba3 was best. } (36. Ba3 Bxa3) 36... Rd4?! { (-3.69 → -2.73) Inaccuracy. Bd6 was best. } (36... Bd6 37. Qe2 b5 38. axb5 axb5 39. Kh1 Bf8 40. Rb3 b4 41. Be3 f5 42. f3 f4 43. Bc1) 37. Qc6 R4d6 38. Qf3 Rd4 39. Qc6 R4d6 40. Qf3 b5 41. axb5 axb5 42. Rxe5 Rd3 43. Qf5 Rxg3 44. fxg3 b4?! { (-2.75 → -1.69) Inaccuracy. Qc4 was best. } (44... Qc4 45. Re1 Bb4 46. Rf1 Qd3 47. Bb2 Bf8 48. Qf2 Rc8 49. Qf5 Qxf5 50. Rxf5 b4 51. Rb5) 45. Rb5 Qd7 46. Qxd7 Rxd7 47. h4? { (-1.74 → -3.35) Mistake. Bf4 was best. } (47. Bf4 g5 48. Bb8 Kg8 49. g4 Kf7 50. Kg3 Rd3+ 51. Kf2 Ke6 52. Ba7 Bd6 53. Ke2 Rg3) 47... Rd3 48. Bf4 g5 49. hxg5 hxg5 50. Bc1 Bd6 51. Bb2?! { (-5.17 → -6.75) Inaccuracy. Rb7 was best. } (51. Rb7 b3 52. Kg1 Bxg3 53. Kf1 Rd1+ 54. Ke2 Rxc1 55. Rxb3 Be5 56. Rb7 Kg8 57. Kf3 Rc7) 51... Bxg3+ 52. Kh3 Be5+ 53. Kg4 Bxb2 54. Rb7 Kg8 55. Kf5 Bc3 56. Kg6 Kf8 57. g4 Ke8 58. Kf5 Re3 59. Rb6?? { (-6.96 → Mate in 20) Checkmate is now unavoidable. Kg6 was best. } (59. Kg6 Rg3 60. Kf5 Kd8 61. Rb8+ Kc7 62. Rb5 Kc6 63. Rb8 Rf3+ 64. Kg6 Kd5 65. Rd8+ Ke4) 59... Kd7? { (Mate in 20 → -7.40) Lost forced checkmate sequence. Kf7 was best. } (59... Kf7 60. Rxf6+ Ke7 61. Rh6 Re5+ 62. Kg6 Re6+ 63. Kxg5 Rxh6 64. Kxh6 b3 65. Kg5 b2 66. Kf4) 60. Rb5? { (-7.40 → Mate in 12) Checkmate is now unavoidable. Ra6 was best. } (60. Ra6 Rf3+ 61. Kg6 Rf4 62. Ra7+ Kc6 63. Kh5 Be5 64. Ra2 b3 65. Re2 b2 66. Re1 Kd5) 60... Re5+ 61. Rxe5 fxe5 62. Kxg5 b3 63. Kh6 b2 64. g5 b1=Q 65. g6 Ke6 66. g7 Kf6 67. g8=Q Qh1# { Black wins. } 0-1