Event: Round 8: Semen Demenshin - Vladimir Matveev
Date: 2023-07-30
White: Semen Demenshin
Black: Vladimir Matveev
BlackTitle: FM
Result: 0-1
ECO: E83
Opening: King's Indian Defense: Sämisch Variation, Yates Defense
Variant: Standard

1. d4 { [%eval 0.0] [%clk 0:15:19] } 1... Nf6 { [%eval 0.28] [%clk 0:15:20] } 2. c4 { [%eval 0.16] } 2... g6 { [%eval 0.3] } 3. f3 { [%eval 0.01] [%clk 0:15:34] } 3... Bg7 { [%eval 0.38] [%clk 0:15:38] } 4. e4 { [%eval 0.34] [%clk 0:15:43] } 4... O-O { [%eval 0.58] [%clk 0:15:46] } 5. Nc3 { [%eval 0.29] [%clk 0:15:52] } 5... d6 { [%eval 0.47] [%clk 0:15:56] } 6. Be3 { [%eval 0.29] [%clk 0:16:01] } 6... Nc6 { [%eval 0.77] [%clk 0:16:05] } 7. Qd2 { [%eval 0.62] [%clk 0:16:09] } 7... a6 { [%eval 0.62] [%clk 0:16:14] } 8. O-O-O { [%eval 0.3] [%clk 0:16:12] } 8... b5 { [%eval 0.34] [%clk 0:15:28] } 9. g4 { [%eval 0.3] [%clk 0:15:34] } 9... e5 { [%eval 0.33] [%clk 0:13:43] } 10. Nge2 { [%eval 0.29] [%clk 0:15:21] } 10... exd4 { [%eval 0.36] [%clk 0:09:37] } 11. Nxd4 { [%eval 0.56] [%clk 0:15:30] } 11... Nxd4 { [%eval 0.43] [%clk 0:09:46] } 12. Bxd4 { [%eval 0.4] [%clk 0:15:33] } 12... c5 { [%eval 0.85] [%clk 0:09:55] } 13. Be3?! { [%eval 0.14] } { Inaccuracy. Bxc5 was best. } { [%clk 0:12:50] } 13... b4 { [%eval 0.33] [%clk 0:09:57] } 14. Nd5? { [%eval -1.05] } { Mistake. Ne2 was best. } { [%clk 0:12:21] } 14... Nxd5 { [%eval -1.29] [%clk 0:08:47] } 15. Qxd5 { [%eval -1.42] [%clk 0:11:11] } 15... Be6? { [%eval 0.03] } { Mistake. b3 was best. } { [%clk 0:08:56] } 16. Qd2 { [%eval 0.01] [%clk 0:10:36] } 16... Qa5?! { [%eval 0.72] } { Inaccuracy. a5 was best. } { [%clk 0:08:39] } 17. Kb1 { [%eval 0.73] [%clk 0:10:46] } 17... Rfd8 { [%eval 0.98] [%clk 0:08:48] } 18. h4 { [%eval 0.92] [%clk 0:10:55] } 18... Qa4 { [%eval 1.1] [%clk 0:07:49] } 19. b3?? { [%eval -0.63] } { Blunder. h5 was best. } { [%clk 0:10:40] } 19... Qe8?! { [%eval -0.01] } { Inaccuracy. Qc6 was best. } { [%clk 0:07:30] } 20. Qc2?? { [%eval -1.77] } { Blunder. h5 was best. } { [%clk 0:04:42] } 20... a5 { [%eval -1.76] [%clk 0:07:23] } 21. Bc1 { [%eval -1.64] [%clk 0:04:41] } 21... a4 { [%eval -1.9] [%clk 0:07:30] } 22. Bb2 { [%eval -1.95] [%clk 0:04:47] } 22... axb3 { [%eval -1.68] [%clk 0:07:38] } 23. axb3 { [%eval -1.83] [%clk 0:04:49] } 23... Be5?! { [%eval -1.23] } { Inaccuracy. Bxb2 was best. } { [%clk 0:07:33] } 24. Bd3?! { [%eval -2.11] } { Inaccuracy. Be2 was best. } { [%clk 0:04:10] } 24... Qe7 { [%eval -2.07] [%clk 0:07:16] } 25. g5 { [%eval -2.2] [%clk 0:03:34] } 25... Qa7 { [%eval -1.85] [%clk 0:06:40] } 26. Bxe5 { [%eval -2.02] [%clk 0:02:35] } 26... dxe5 { [%eval -2.03] [%clk 0:06:49] } 27. Qb2 { [%eval -1.97] [%clk 0:02:44] } 27... Qc7 { [%eval -1.8] [%clk 0:05:45] } 28. Kc2 { [%eval -1.94] [%clk 0:02:29] } 28... Ra3?! { [%eval -0.8] } { Inaccuracy. Rd4 was best. } { [%clk 0:05:34] } 29. Be2 { [%eval -0.89] [%clk 0:01:43] } 29... Rd4 { [%eval -0.92] [%clk 0:05:22] } 30. Ra1 { [%eval -0.93] [%clk 0:01:23] } 30... Qd6 { [%eval -0.82] [%clk 0:02:08] } 31. Rhd1 { [%eval -0.83] [%clk 0:01:06] } 31... Rxa1 { [%eval -0.81] [%clk 0:02:10] } 32. Qxa1 { [%eval -0.83] [%clk 0:01:09] } 32... Kg7 { [%eval -0.5] [%clk 0:02:19] } 33. Bd3 { [%eval -0.62] [%clk 0:00:45] } 33... h6 { [%eval -0.61] [%clk 0:01:55] } 34. Qc1 { [%eval -0.76] [%clk 0:00:30] } 34... h5 { [%eval -0.75] [%clk 0:01:46] } 35. Qa1 { [%eval -0.74] [%clk 0:00:31] } 35... Qc7 { [%eval -0.81] [%clk 0:01:46] } 36. Be2 { [%eval -0.65] [%clk 0:00:27] } 36... Qd6 { [%eval -0.68] [%clk 0:01:43] } 37. Bd3 { [%eval -0.69] [%clk 0:00:36] } 37... Bh3 { [%eval -0.78] [%clk 0:01:50] } 38. Qc1 { [%eval -0.6] [%clk 0:00:18] } 38... Qa6 { [%eval -0.61] [%clk 0:01:39] } 39. Qa1 { [%eval -0.67] [%clk 0:00:19] } 39... Qe6 { [%eval -0.67] [%clk 0:01:41] } 40. Be2 { [%eval -0.66] [%clk 0:00:13] } 40... Bg2 { [%eval -0.67] [%clk 0:01:14] } 41. Rd3 { [%eval -0.94] [%clk 0:00:15] } 41... Qh3 { [%eval -1.05] [%clk 0:00:46] } 42. Qa7?? { [%eval -4.92] } { Blunder. Rxd4 was best. } { [%clk 0:00:13] } 42... Qh2 { [%eval -5.33] [%clk 0:00:30] } 43. Rxd4 { [%eval -4.66] [%clk 0:00:12] } 43... cxd4 { [%eval -5.48] [%clk 0:00:30] } 44. Qe7 { [%eval -6.16] [%clk 0:00:14] } 44... Bf1 { [%eval -6.22] [%clk 0:00:35] } 45. Qf6+?! { [%eval -38.17] } { Inaccuracy. Kc1 was best. } { [%clk 0:00:12] } 45... Kg8 { [%eval #-14] [%clk 0:00:44] } 46. Qd8+ { [%eval #-14] [%clk 0:00:12] } 46... Kh7 { [%eval #-13] [%clk 0:00:53] } 47. Qf6 { [%eval #-6] [%clk 0:00:11] } 47... Qxe2+ { [%eval #-5] [%clk 0:00:59] } 48. Kb1 { [%eval #-5] [%clk 0:00:17] } 48... Qd3+ { [%eval #-6] [%clk 0:01:07] } 49. Kb2 { [%eval #-4] [%clk 0:00:17] } 49... Qc3+ { [%eval #-4] [%clk 0:01:15] } 50. Ka2 { [%eval #-4] [%clk 0:00:24] } 50... Qd2+ { [%eval #-3] [%clk 0:01:17] } 51. Ka1 { [%eval #-3] [%clk 0:00:31] } 51... Qf4?? { [%eval -6.1] } { Lost forced checkmate sequence. Qc1+ was best. } { [%clk 0:01:26] } 52. Qe7?? { [%eval #-3] } { Checkmate is now unavoidable. Qxf4 was best. } { [%clk 0:00:11] } 52... d3?! { [%eval -22.37] } { Lost forced checkmate sequence. Qc1+ was best. } { [%clk 0:01:27] } 53. c5?! { [%eval #-7] } { Checkmate is now unavoidable. Kb2 was best. } { [%clk 0:00:20] } 53... d2 { [%eval #-7] [%clk 0:01:34] } 54. Qd7 { [%eval #-7] [%clk 0:00:26] } 54... Be2 { [%eval #-6] [%clk 0:01:38] } 0-1