Event: Round 8: Sebastian Marin Posada - Santiago Ospina Castro
Date: 2023-08-07
White: Sebastian Marin Posada
Black: Santiago Ospina Castro
Result: 1/2-1/2
ECO: B67
Opening: Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation
Variant: Standard

1. e4 { [%eval 0.36] [%clk 1:26:35] } 1... c5 { [%eval 0.32] [%clk 1:30:26] } 2. Nf3 { [%eval 0.0] [%clk 1:26:24] } 2... d6 { [%eval 0.0] [%clk 1:30:48] } 3. d4 { [%eval 0.25] [%clk 1:26:39] } 3... cxd4 { [%eval 0.13] [%clk 1:31:14] } 4. Nxd4 { [%eval 0.27] [%clk 1:27:04] } 4... Nf6 { [%eval 0.3] [%clk 1:31:39] } 5. Nc3 { [%eval 0.21] [%clk 1:27:28] } 5... Nc6 { [%eval 0.47] [%clk 1:32:06] } 6. Bg5 { [%eval 0.0] [%clk 1:27:47] } 6... e6 { [%eval 0.23] [%clk 1:32:31] } 7. Qd2 { [%eval 0.09] [%clk 1:27:43] } 7... a6 { [%eval 0.29] [%clk 1:32:51] } 8. O-O-O { [%eval 0.47] [%clk 1:27:43] } 8... Bd7 { [%eval 0.5] [%clk 1:33:12] } 9. f3 { [%eval 0.42] [%clk 1:27:26] } 9... Nxd4 { [%eval 0.4] [%clk 1:33:13] } 10. Qxd4 { [%eval 0.35] [%clk 1:27:31] } 10... Be7 { [%eval 0.47] [%clk 1:33:35] } 11. Kb1 { [%eval 0.46] [%clk 1:26:14] } 11... Qc7 { [%eval 0.32] [%clk 1:33:58] } 12. Qd2 { [%eval 0.53] [%clk 1:18:47] } 12... b5 { [%eval 0.5] [%clk 1:33:21] } 13. Bd3 { [%eval 0.28] [%clk 1:13:58] } 13... b4 { [%eval 0.28] [%clk 1:28:33] } 14. Ne2 { [%eval 0.22] [%clk 1:14:00] } 14... a5 { [%eval 0.34] [%clk 1:28:57] } 15. Nd4?! { [%eval -0.37] } { Inaccuracy. g4 was best. } { [%clk 1:07:59] } 15... Rb8 { [%eval -0.07] [%clk 1:29:06] } 16. h4 { [%eval -0.22] [%clk 0:57:44] } 16... h6 { [%eval 0.24] [%clk 1:25:55] } 17. Be3 { [%eval 0.25] [%clk 0:58:03] } 17... h5 { [%eval 0.27] [%clk 1:26:15] } 18. Bg5?! { [%eval -0.35] } { Inaccuracy. c4 was best. } { [%clk 0:52:21] } 18... a4 { [%eval -0.35] [%clk 1:16:27] } 19. f4?! { [%eval -0.95] } { Inaccuracy. Rhe1 was best. } { [%clk 0:43:00] } 19... e5 { [%eval -0.61] [%clk 1:04:26] } 20. fxe5 { [%eval -0.88] [%clk 0:27:32] } 20... dxe5 { [%eval -0.79] [%clk 1:04:35] } 21. Bxf6?! { [%eval -1.38] } { Inaccuracy. Nf5 was best. } { [%clk 0:27:35] } 21... gxf6?! { [%eval -0.46] } { Inaccuracy. Bxf6 was best. } { [%clk 0:59:29] } 22. Nf5 { [%eval -0.41] [%clk 0:26:58] } 22... Bxf5 { [%eval -0.4] [%clk 0:59:49] } 23. exf5 { [%eval -0.51] [%clk 0:27:25] } 23... a3 { [%eval -0.46] [%clk 0:59:34] } 24. Qe2 { [%eval -0.41] [%clk 0:24:31] } 24... Qb6?! { [%eval 0.5] } { Inaccuracy. Kf8 was best. } { [%clk 0:52:25] } 25. Bc4 { [%eval 0.55] [%clk 0:23:54] } 25... Bc5?! { [%eval 1.51] } { Inaccuracy. Kf8 was best. } { [%clk 0:46:23] } 26. Rd5?! { [%eval 0.52] } { Inaccuracy. g4 was best. } { [%clk 0:21:13] } 26... Bd4?? { [%eval 3.65] } { Blunder. Ke7 was best. } { [%clk 0:45:11] } 27. Rd1 { [%eval 3.82] [%clk 0:19:51] } 27... Kf8 { [%eval 4.19] [%clk 0:45:29] } 28. b3?? { [%eval 0.0] } { Blunder. Rd7 was best. } { [%clk 0:08:17] } 28... Qc7 { [%eval -0.03] [%clk 0:42:32] } 29. Qf3 { [%eval 0.0] } 1/2-1/2