Event: Round 7: Nico Chasin - Aleksandr Ostrovskiy
Site: https://lichess.org/study/M8I9ZIHI/69J1mo6d
Date: 2023-01-15
White: Nico Chasin
WhiteTitle: FM
Black: Aleksandr Ostrovskiy
BlackTitle: IM
Result: 1-0
ECO: E11
Opening: Bogo-Indian Defense: Grünfeld Variation
Variant: Standard

1. d4 { [%eval 0.0] [%clk 1:27:28] } 1... Nf6 { [%eval 0.28] [%clk 1:27:40] } 2. c4 { [%eval 0.16] [%clk 1:27:37] } 2... e6 { [%eval 0.23] [%clk 1:28:06] } 3. Nf3 { [%eval 0.0] [%clk 1:28:01] } 3... Bb4+ { [%eval 0.43] [%clk 1:28:25] } 4. Nbd2 { [%eval 0.28] [%clk 1:28:20] } 4... O-O { [%eval 0.45] [%clk 1:28:26] } 5. a3 { [%eval 0.43] [%clk 1:28:44] } 5... Be7 { [%eval 0.62] [%clk 1:28:50] } 6. e4 { [%eval 0.32] [%clk 1:28:28] } 6... d6 { [%eval 0.67] [%clk 1:28:16] } 7. b4 { [%eval 0.26] [%clk 1:22:44] } 7... e5 { [%eval 0.29] [%clk 1:21:23] } 8. d5 { [%eval -0.01] [%clk 1:19:19] } 8... a5 { [%eval 0.08] [%clk 1:09:12] } 9. Bb2 { [%eval -0.03] [%clk 1:19:40] } 9... Nfd7?! { [%eval 0.67] } { Inaccuracy. c6 was best. } { [%clk 0:55:34] } 10. Bd3 { [%eval 0.68] [%clk 1:18:47] } 10... axb4 { [%eval 0.58] [%clk 0:55:21] } 11. axb4 { [%eval 0.64] [%clk 1:19:00] } 11... Rxa1 { [%eval 0.51] [%clk 0:55:48] } 12. Qxa1 { [%eval 0.53] [%clk 1:18:26] } 12... c5 { [%eval 0.64] [%clk 0:55:50] } 13. b5 { [%eval 0.67] [%clk 1:15:52] } 13... Nf6 { [%eval 0.62] [%clk 0:54:45] } 14. Nf1 { [%eval 0.49] [%clk 0:59:10] } 14... Nh5 { [%eval 0.36] [%clk 0:38:02] } 15. Ne3 { [%eval 0.45] [%clk 0:56:49] } 15... g6 { [%eval 0.41] [%clk 0:33:13] } 16. Qd1 { [%eval 0.34] [%clk 0:48:28] } 16... Nd7 { [%eval 0.24] [%clk 0:30:31] } 17. g3 { [%eval 0.29] [%clk 0:47:27] } 17... Ng7 { [%eval 0.34] [%clk 0:19:34] } 18. h4 { [%eval -0.12] [%clk 0:39:25] } 18... f5 { [%eval -0.01] [%clk 0:13:50] } 19. exf5 { [%eval -0.05] [%clk 0:18:16] } 19... gxf5 { [%eval 0.0] [%clk 0:09:03] } 20. Nd2 { [%eval -0.01] [%clk 0:16:06] } 20... e4 { [%eval -0.04] [%clk 0:06:50] } 21. Be2 { [%eval 0.01] [%clk 0:15:19] } 21... Bf6 { [%eval 0.16] [%clk 0:06:06] } 22. Bxf6 { [%eval 0.14] [%clk 0:15:40] } 22... Qxf6 { [%eval 0.24] [%clk 0:06:15] } 23. Ng2 { [%eval 0.15] [%clk 0:15:31] } 23... Ne5 { [%eval 0.0] [%clk 0:06:13] } 24. h5 { [%eval -0.18] [%clk 0:15:52] } 24... h6 { [%eval 0.0] [%clk 0:05:56] } 25. Nf4 { [%eval 0.0] [%clk 0:15:15] } 25... Bd7 { [%eval 0.0] [%clk 0:06:16] } 26. Kf1 { [%eval 0.0] [%clk 0:15:34] } 26... Ra8 { [%eval 0.0] [%clk 0:05:55] } 27. Kg2?! { [%eval -0.55] } { Inaccuracy. Qc2 was best. } { [%clk 0:15:48] } 27... Ra2 { [%eval -0.68] [%clk 0:03:18] } 28. Nf1 { [%eval -0.44] [%clk 0:16:15] } 28... Nf7 { [%eval -0.44] [%clk 0:02:22] } 29. Ne3 { [%eval -0.3] [%clk 0:15:18] } 29... Ra3?! { [%eval 0.39] } { Inaccuracy. Qb2 was best. } { [%clk 0:01:53] } 30. Qd2 { [%eval 0.49] [%clk 0:14:56] } 30... Ng5 { [%eval 0.46] [%clk 0:01:15] } 31. Rb1 { [%eval 0.42] [%clk 0:13:46] } 31... Nf7 { [%eval 0.53] [%clk 0:00:56] } 32. Rb2 { [%eval 0.68] [%clk 0:13:58] } 32... Qd8 { [%eval 0.47] [%clk 0:00:45] } 33. Nc2 { [%eval 0.24] [%clk 0:13:04] } 33... Ra8 { [%eval 0.4] [%clk 0:00:55] } 34. Rb3 { [%eval 0.7] [%clk 0:13:17] } 34... Ne5 { [%eval 0.83] [%clk 0:00:54] } 35. Qc1 { [%eval 1.04] [%clk 0:10:47] } 35... Ra4 { [%eval 0.72] [%clk 0:01:05] } 36. Ra3 { [%eval 0.78] [%clk 0:10:07] } 36... Qa5 { [%eval 1.34] [%clk 0:01:07] } 37. Ng6? { [%eval 0.19] } { Mistake. Rxa4 was best. } { [%clk 0:10:36] } 37... Nf7? { [%eval 1.44] } { Mistake. Rxa3 was best. } { [%clk 0:01:04] } 38. Rxa4 { [%eval 1.21] [%clk 0:10:53] } 38... Qxa4 { [%eval 1.34] [%clk 0:01:32] } 39. Qb2 { [%eval 1.44] [%clk 0:11:22] } 39... Qa5 { [%eval 1.31] [%clk 0:00:55] } 40. Ne3 { [%eval 1.37] [%clk 0:11:44] } 40... Qd8 { [%eval 1.51] [%clk 0:00:37] } 41. Qa1 { [%eval 1.4] [%clk 0:12:13] } 41... Kh7 { [%eval 1.55] [%clk 0:00:36] } 42. Qa7 { [%eval 1.46] [%clk 0:12:28] } 42... Bc8?! { [%eval 2.34] } { Inaccuracy. Qc8 was best. } { [%clk 0:00:35] } 43. Qb8?? { [%eval -3.16] } { Blunder. Bd1 was best. } { [%clk 0:12:31] } 43... f4 { [%eval -3.63] [%clk 0:00:54] } 44. Bg4?! { [%eval -5.2] } { Inaccuracy. Kg1 was best. } { [%clk 0:11:53] } 44... Bxg4?? { [%eval 0.0] } { Blunder. fxe3 was best. } { [%clk 0:00:55] } 45. Nxg4 { [%eval 0.0] [%clk 0:12:22] } 45... f3+ { [%eval 0.12] [%clk 0:00:42] } 46. Kh3 { [%eval 0.05] [%clk 0:10:34] } 46... Nxh5 { [%eval 0.16] [%clk 0:00:49] } 47. Qxd8 { [%eval 0.08] [%clk 0:11:02] } 47... Nxd8 { [%eval 0.0] [%clk 0:01:16] } 48. Ne7 { [%eval 0.03] [%clk 0:11:30] } 48... Kg7?? { [%eval 3.35] } { Blunder. Nf7 was best. } { [%clk 0:00:32] } 49. Nf5+ { [%eval 3.51] [%clk 0:11:56] } 49... Kg6 { [%eval 3.69] [%clk 0:00:50] } 50. Nxd6 { [%eval 3.21] [%clk 0:12:23] } 50... Ng7 { [%eval 3.67] [%clk 0:00:31] } 51. Nxe4 { [%eval 3.57] [%clk 0:12:41] } 51... b6?! { [%eval 4.98] } { Inaccuracy. h5 was best. } { [%clk 0:00:31] } 52. Nd6 { [%eval 5.07] [%clk 0:13:08] } 52... Nf5 { [%eval 5.25] } 53. Ne5+ { [%eval 5.2] [%clk 0:13:08] } 53... Kf6 { [%eval 5.08] [%clk 0:00:32] } 54. Nd7+ { [%eval 5.34] [%clk 0:13:34] } 54... Ke7 { [%eval 5.49] [%clk 0:00:57] } 55. Nxf5+ { [%eval 5.89] [%clk 0:13:57] } 55... Kxd7 { [%eval 5.27] [%clk 0:01:25] } 56. Nxh6 { [%eval 6.1] [%clk 0:12:50] } 56... Nb7 { [%eval 6.36] [%clk 0:01:48] } 57. Nf5 { [%eval 6.06] [%clk 0:13:14] } 57... Na5 { [%eval 6.22] [%clk 0:00:55] } 58. Ne3 { [%eval 6.44] [%clk 0:13:42] } 1-0