CohenChessClub.com

[Event " MrCohenOS Arena"] [Site "https://cohenchessclub.com/yVDvxTWj"] [Date "2025.07.25"] [White "Nathan4"] [Black "LEO2"] [Result "0-1"] [UTCDate "2025.07.25"] [UTCTime "23:37:23"] [WhiteElo "1435"] [BlackElo "1303"] [WhiteRatingDiff "-44"] [BlackRatingDiff "+61"] [WhiteTitle "GM"] [BlackTitle "GM"] [Variant "Standard"] [TimeControl "420+2"] [ECO "B30"] [Opening "Sicilian Defense: Nyezhmetdinov-Rossolimo Attack"] [Termination "Normal"] [Annotator "cohenchessclub.com"] 1. e4 c5 2. Nf3 Nc6 3. Bb5 { B30 Sicilian Defense: Nyezhmetdinov-Rossolimo Attack } a6 4. Ba4?? { (0.74 → -3.78) Blunder. Bxc6 was best. } (4. Bxc6 bxc6) 4... b5 5. Bb3 d6?? { (-3.39 → 0.04) Blunder. c4 was best. } (5... c4 6. d4 cxb3 7. axb3 d6 8. c4 Bg4 9. Be3 e5 10. d5 Nd4 11. Bxd4 exd4 12. O-O) 6. d3 e5 7. Nc3 Be6 8. Bxe6 fxe6 9. Bg5 Nf6 10. O-O b4?! { (-0.33 → 0.42) Inaccuracy. Be7 was best. } (10... Be7 11. Bxf6 Bxf6 12. Ne2 O-O 13. Nc1 Ra7 14. Qe2 Raf7 15. c3 a5 16. a4 b4 17. Nb3) 11. Na4 Qa5?! { (0.00 → 0.95) Inaccuracy. Be7 was best. } (11... Be7 12. a3 a5 13. axb4 axb4 14. c3 Rb8 15. Bxf6 Bxf6 16. Nd2 O-O 17. Qg4 Qd7 18. Nc4) 12. b3?! { (0.95 → 0.35) Inaccuracy. c3 was best. } (12. c3) 12... h6? { (0.35 → 1.75) Mistake. Be7 was best. } (12... Be7 13. Be3 h6 14. a3 bxa3 15. Rxa3 O-O 16. Ra2 Qc7 17. c3 Ng4 18. Nd2 Nxe3 19. fxe3) 13. Bxf6 gxf6 14. Nb2? { (1.62 → 0.45) Mistake. a3 was best. } (14. a3 bxa3 15. Nd2 h5 16. Rxa3 Qc7 17. c3 Kf7 18. Nc4 d5 19. exd5 exd5 20. Ne3 Ne7) 14... Nd4?? { (0.45 → 3.69) Blunder. Bg7 was best. } (14... Bg7) 15. Nxd4 cxd4 16. Nc4 Qc5 17. Qh5+ Kd8?? { (3.31 → 7.89) Blunder. Kd7 was best. } (17... Kd7 18. f4 exf4 19. Qxc5 dxc5 20. Nb6+ Kc6 21. Nxa8 Bd6 22. a3 Rxa8 23. axb4 cxb4 24. Ra5) 18. Qf7 d5 19. exd5?! { (8.86 → 5.55) Inaccuracy. Qxf6+ was best. } (19. Qxf6+ Qe7) 19... exd5?! { (5.55 → 8.81) Inaccuracy. Qe7 was best. } (19... Qe7 20. dxe6 Qxf7 21. exf7 Ke7 22. f4 exf4 23. Rxf4 Kxf7 24. Raf1 Be7 25. Ne5+ Kg7 26. Rg4+) 20. Qb7? { (8.81 → 4.31) Mistake. Qxf6+ was best. } (20. Qxf6+ Kc7) 20... Rc8 21. Nb6 Rc7? { (3.83 → 7.45) Mistake. Qc6 was best. } (21... Qc6 22. Qxc8+ Qxc8 23. Nxc8 Kxc8 24. Rae1 Kd7 25. f4 Ke6 26. g4 Rg8 27. h3 Be7 28. Re2) 22. Qxa6?? { (7.45 → 2.14) Blunder. Qa8+ was best. } (22. Qa8+ Ke7 23. Nxd5+ Kd7 24. Nxc7 Kxc7 25. Rae1 Qc6 26. Qa7+ Qb7 27. Qxb7+ Kxb7 28. f4 Bd6) 22... Qxc2?? { (2.14 → 8.66) Blunder. Ke8 was best. } (22... Ke8 23. f4) 23. Nxd5 Rd7 24. Nxf6 Rc7 25. Rfc1?? { (10.44 → Mate in 2) Checkmate is now unavoidable. Qa8+ was best. } (25. Qa8+ Ke7) 25... Qxd3?? { (Mate in 2 → 14.54) Lost forced checkmate sequence. Qxc1+ was best. } (25... Qxc1+ 26. Rxc1 Rxc1#) 26. Rxc7?? { (14.54 → -0.12) Blunder. Qa8+ was best. } (26. Qa8+) 26... Qxa6 27. Rd7+ Kc8 28. Rc1+ Kb8 29. Rf7?? { (0.00 → -6.09) Blunder. Rd8+ was best. } (29. Rd8+ Kb7 30. Rd7+ Kb6 31. Nd5+ Ka5 32. Nc7 Qf6 33. Rd5+ Kb6 34. Rb5+ Ka7 35. Ra5+ Kb7) 29... Qxa2?? { (-6.09 → 0.00) Blunder. Bd6 was best. } (29... Bd6) 30. Re1?? { (0.00 → -5.53) Blunder. Nd7+ was best. } (30. Nd7+ Kb7 31. Nxe5+ Kb8 32. Nd7+ Kb7 33. Nxf8+ Ka6 34. Rf6+ Kb7) 30... Qd2?? { (-5.53 → 8.01) Blunder. Bd6 was best. } (30... Bd6) 31. Kf1?? { (8.01 → -5.73) Blunder. Nd7+ was best. } (31. Nd7+) 31... Qd3+ 32. Re2 Qxb3 33. Rxe5?! { (-6.29 → -12.03) Inaccuracy. Nd7+ was best. } (33. Nd7+ Ka7) 33... Bd6 34. Ree7 Bxe7 35. Rxe7 Rf8 36. Nd7+ Kc8 37. Nxf8 Kd8 38. Rd7+ Ke8 39. Rxd4 Kxf8 40. Rf4+ Ke8 41. Re4+ Kd8 42. Rd4+ Kc8 43. Rd6 Qc3 44. Rxh6 b3 45. Rb6 b2?! { (-12.05 → -6.43) Inaccuracy. Qd4 was best. } (45... Qd4) 46. Ke2?! { (-6.43 → -56.39) Inaccuracy. g3 was best. } (46. g3 Kc7) 46... Qc2+ 47. Ke3 b1=Q?! { (Mate in 7 → -10.88) Lost forced checkmate sequence. Qc5+ was best. } (47... Qc5+ 48. Kf3 Qxb6 49. g4 b1=Q 50. Kg3 Qg1+ 51. Kf4 Qd4+ 52. Kg5 Qgxg4+ 53. Kh6 Qdg7#) 48. Rxb1 Qxb1 49. f4 Kd7 50. g4 Ke6 51. f5+ Ke5 52. Kf3 Qe4+ 53. Kg3 Qe3+ 54. Kh4 Kf4 55. g5 Kxf5 56. Kh5 Qxg5# { Black wins by checkmate. } 0-1