[Event "Warsaw Najdorf Memorial 2023"] [Site "?"] [Date "2023.07.17"] [Round "7.19"] [White "Cherniaiev, Tykhon"] [Black "Majocha, Piotr"] [Result "1-0"] [WhiteElo "2331"] [BlackElo "1979"] [Variant "Standard"] [TimeControl "-"] [ECO "D91"] [Opening "Grünfeld Defense: Three Knights Variation, Petrosian System"] [Termination "Unknown"] [Annotator "lichess.org"] 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bg5 { D91 Grünfeld Defense: Three Knights Variation, Petrosian System } Ne4 6. cxd5 Nxg5 7. Nxg5 e6 8. Nf3 exd5 9. e3 O-O 10. Be2 a5 11. O-O c6 12. a3 Bg4 13. b4 axb4 14. axb4 Rxa1 15. Qxa1 b5 16. Nd2 Bxe2 17. Nxe2 Qe7 18. Qc3 Rc8 19. Nf4 Rc7 20. Ra1 Ra7 21. Nd3 Bf8 22. Nb3 Rxa1+ 23. Qxa1 Qc7 24. h3 f6?! { (0.61 → 1.45) Inaccuracy. Nd7 was best. } (24... Nd7 25. Qa6 Kg7 26. Na5 Nb8 27. Qa8 h5 28. Nc5 Bd6 29. Nab7 Bf8 30. g3 Be7 31. Nd3) 25. h4?! { (1.45 → 0.72) Inaccuracy. Nbc5 was best. } (25. Nbc5 Kf7 26. Qa8 Be7 27. h4 Bxc5 28. bxc5 Ke7 29. Nb4 f5 30. Nd3 Kd8 31. g3) 25... Kf7?! { (0.72 → 1.54) Inaccuracy. Nd7 was best. } (25... Nd7) 26. h5?! { (1.54 → 0.84) Inaccuracy. Qa8 was best. } (26. Qa8 Be7 27. Nbc5 Qc8 28. g3 Bd6 29. Nb7 Bc7 30. Na5 Bd6 31. Nc5 h5 32. Kg2 Ke7) 26... Bd6 27. hxg6+ hxg6 28. Qa2 Qe7 29. Nbc5 Bxc5 30. bxc5 Qb7 31. Nb4 f5 32. Qa5 Qc8? { (0.70 → 2.04) Mistake. Ke8 was best. } (32... Ke8) 33. Qa8 Qc7 34. Nd3 Kf6 35. g3 Kf7 36. Kg2?! { (2.74 → 1.98) Inaccuracy. Ne5+ was best. } (36. Ne5+ Kg7 37. Kf1 Kh7 38. Ke2 Kg7 39. Kd2 Kh7 40. Kc3 Kh6 41. Kb4 g5 42. Kc3 g4) 36... Kf6 37. Kf1 Kf7 38. Ke2 Kf6 39. Kd2 Kf7 40. Kc3 Kf6 41. Ne5 Kg7 42. Kb4 Kh7 43. Qa5 Qb7 44. Qb6 Qa8 45. Qc7+ Kh6? { (7.33 → Mate in 6) Checkmate is now unavoidable. Nd7 was best. } (45... Nd7 46. Qxd7+ Kh6 47. Qd6 Qg8 48. Qxc6 Qg7 49. Kxb5 Qg8 50. Ka6 f4 51. exf4 Qg7 52. Kb6) 46. Nf7+ Kh5 47. g4+ { White wins. } 1-0