Event: Las Vegas National Open 2023
Date: 2023-06-18
White: Semen Khanin
WhiteTitle: GM
Black: Viktor Matviishen
BlackTitle: GM
Result: 1/2-1/2
ECO: D12
Opening: Slav Defense: Quiet Variation, Schallopp Defense
Variant: Standard
TimeControl: G/90 +30 sec inc

1. d4 { [%eval 0.0] [%clk 1:30:57] } 1... Nf6 { [%eval 0.28] [%clk 1:30:51] } 2. c4 { [%eval 0.16] [%clk 1:31:21] } 2... c6 { [%eval 0.29] [%clk 1:30:33] } 3. Nf3 { [%eval 0.16] [%clk 1:31:14] } 3... d5 { [%eval 0.38] [%clk 1:30:59] } 4. e3 { [%eval 0.24] [%clk 1:31:39] } 4... Bf5 { [%eval 0.3] [%clk 1:31:15] } 5. Nc3 { [%eval 0.27] [%clk 1:31:29] } 5... e6 { [%eval 0.24] [%clk 1:31:41] } 6. Nh4 { [%eval 0.28] [%clk 1:31:40] } 6... Be4 { [%eval 0.4] [%clk 1:32:10] } 7. f3 { [%eval 0.33] [%clk 1:32:02] } 7... Bg6 { [%eval 0.43] [%clk 1:32:36] } 8. Bd2 { [%eval 0.28] [%clk 1:27:57] } 8... Be7 { [%eval 0.54] [%clk 1:32:32] } 9. Nxg6 { [%eval 0.4] [%clk 1:28:13] } 9... hxg6 { [%eval 0.46] [%clk 1:32:58] } 10. Qc2 { [%eval 0.61] [%clk 1:28:21] } 10... Nbd7 { [%eval 0.31] [%clk 1:28:47] } 11. Bd3?! { [%eval -0.33] } { Inaccuracy. O-O-O was best. } { [%clk 1:27:26] } 11... a6?! { [%eval 0.32] } { Inaccuracy. dxc4 was best. } { [%clk 1:24:16] } 12. c5 { [%eval 0.43] [%clk 1:22:54] } 12... e5 { [%eval 0.72] [%clk 1:13:08] } 13. Na4 { [%eval 0.6] [%clk 1:20:56] } 13... Qc7 { [%eval 0.59] [%clk 1:11:30] } 14. g3 { [%eval 0.47] [%clk 1:04:08] } 14... a5 { [%eval 0.85] [%clk 1:07:43] } 15. O-O-O { [%eval 0.75] [%clk 1:03:38] } 15... O-O { [%eval 0.8] [%clk 1:07:54] } 16. g4 { [%eval 0.78] [%clk 1:02:06] } 16... b6 { [%eval 0.89] [%clk 1:02:56] } 17. Nxb6 { [%eval 0.77] [%clk 0:53:33] } 17... Nxb6 { [%eval 0.66] [%clk 1:02:56] } 18. cxb6 { [%eval 0.6] [%clk 0:53:58] } 18... Qxb6 { [%eval 0.49] [%clk 1:01:30] } 19. dxe5 { [%eval 0.49] [%clk 0:52:46] } 19... Nd7 { [%eval 0.52] [%clk 1:01:59] } 20. f4 { [%eval 0.8] [%clk 0:42:19] } 20... a4 { [%eval 0.59] [%clk 1:02:08] } 21. e6?! { [%eval -0.46] } { Inaccuracy. a3 was best. } { [%clk 0:38:48] } 21... fxe6 { [%eval -0.33] [%clk 0:56:51] } 22. Bxg6?! { [%eval -1.2] } { Inaccuracy. a3 was best. } { [%clk 0:38:17] } 22... Rfb8?! { [%eval -0.16] } { Inaccuracy. a3 was best. } { [%clk 0:53:26] } 23. g5?! { [%eval -0.88] } { Inaccuracy. Bc3 was best. } { [%clk 0:34:34] } 23... Bb4?! { [%eval 0.06] } { Inaccuracy. Nf8 was best. } { [%clk 0:53:39] } 24. Bxb4 { [%eval 0.07] [%clk 0:29:03] } 24... Qxb4 { [%eval 0.15] [%clk 0:54:08] } 25. Rd4?! { [%eval -0.54] } { Inaccuracy. a3 was best. } { [%clk 0:23:53] } 25... Qb6 { [%eval -0.21] [%clk 0:49:45] } 26. Bh7+?! { [%eval -0.82] } { Inaccuracy. Rd3 was best. } { [%clk 0:23:43] } 26... Kf8?! { [%eval 0.03] } { Inaccuracy. Kh8 was best. } { [%clk 0:42:05] } 27. a3 { [%eval -0.09] [%clk 0:21:51] } 27... c5 { [%eval -0.24] [%clk 0:40:54] } 28. Rd2 { [%eval -0.58] [%clk 0:21:14] } 28... c4 { [%eval -0.42] [%clk 0:41:16] } 29. Qc3 { [%eval -0.44] [%clk 0:20:30] } 29... Qc6 { [%eval -0.42] [%clk 0:33:44] } 30. Qd4 { [%eval -0.9] [%clk 0:12:57] } 30... Nc5 { [%eval -1.1] [%clk 0:26:20] } 31. Bc2 { [%eval -0.95] [%clk 0:13:22] } 31... Rb3 { [%eval -0.98] [%clk 0:26:23] } 32. f5 { [%eval -0.99] [%clk 0:06:35] } 32... Rd3 { [%eval -1.01] [%clk 0:26:36] } 33. Qh4 { [%eval -1.13] [%clk 0:06:27] } 33... d4? { [%eval 0.0] } { Mistake. Nb3+ was best. } { [%clk 0:19:13] } 34. Qh8+?! { [%eval -0.67] } { Inaccuracy. Rdd1 was best. } { [%clk 0:05:13] } 34... Ke7 { [%eval 0.0] [%clk 0:19:01] } 35. Qxg7+ { [%eval -0.64] [%clk 0:05:35] } 35... Kd6 { [%eval 0.0] [%clk 0:19:30] } 36. Rdd1 { [%eval -0.8] [%clk 0:03:49] } 36... Rxd1+? { [%eval 0.42] } { Mistake. dxe3 was best. } { [%clk 0:14:28] } 37. Rxd1 { [%eval 0.32] [%clk 0:04:15] } 37... d3 { [%eval 0.68] [%clk 0:14:56] } 38. fxe6?! { [%eval 0.0] } { Inaccuracy. Qd4+ was best. } { [%clk 0:00:53] } 38... Qe4 { [%eval 0.01] [%clk 0:13:12] } 39. Qd4+ { [%eval 0.0] [%clk 0:00:38] } 39... Qxd4 { [%eval 0.02] [%clk 0:13:31] } 40. exd4 { [%eval 0.07] [%clk 0:01:04] } 40... Nxe6 { [%eval 0.07] [%clk 0:13:58] } 41. Bxd3 { [%eval 0.0] [%clk 0:00:51] } 41... cxd3 { [%eval 0.02] [%clk 0:14:27] } 42. Rxd3 { [%eval 0.0] [%clk 0:01:04] } 42... Nxg5 { [%eval 0.02] [%clk 0:14:39] } 43. b3 { [%eval 0.0] [%clk 0:01:26] } 43... axb3 { [%eval 0.0] [%clk 0:15:02] } 1/2-1/2