Event: Round 4: Ospina Castro, Santiago - Sanchez Castellanos, German Alex
Date: 2024-09-20
White: Ospina Castro, Santiago
WhiteTitle: FM
WhiteElo: 2106
Black: Sanchez Castellanos, German Alex
BlackElo: 2035
Result: 1-0
ECO: C42
Opening: Petrov's Defense: Kaufmann Attack
Variant: Standard

1. e4 { [%eval 0.18] [%clk 1:27:48] } 1... e5 { [%eval 0.21] [%clk 1:27:37] } 2. Nf3 { [%eval 0.21] [%clk 1:28:04] } 2... Nf6 { [%eval 0.3] [%clk 1:27:30] } 3. Nxe5 { [%eval 0.24] [%clk 1:28:21] } 3... d6 { [%eval 0.32] [%clk 1:27:36] } 4. Nf3 { [%eval 0.31] [%clk 1:28:46] } 4... Nxe4 { [%eval 0.31] [%clk 1:27:59] } 5. c4 { [%eval 0.14] [%clk 1:29:06] } 5... Bf5 { [%eval 0.28] [%clk 1:26:44] } 6. Nc3 { [%eval 0.01] [%clk 1:25:39] } 6... Nxc3 { [%eval 0.12] [%clk 1:24:53] } 7. dxc3 { [%eval 0.15] [%clk 1:24:58] } 7... Nd7 { [%eval 0.44] [%clk 1:15:58] } 8. Bd3 { [%eval 0.11] [%clk 1:16:43] } 8... Bxd3 { [%eval 0.17] [%clk 1:09:10] } 9. Qxd3 { [%eval 0.16] [%clk 1:17:09] } 9... Be7 { [%eval 0.16] [%clk 1:08:38] } 10. Bf4 { [%eval -0.04] [%clk 1:14:04] } 10... a5 { [%eval -0.02] [%clk 1:02:24] } 11. O-O-O { [%eval 0.04] [%clk 1:10:02] } 11... a4 { [%eval 0.16] [%clk 0:57:20] } 12. Nd4 { [%eval -0.14] [%clk 0:57:46] } 12... O-O { [%eval -0.18] [%clk 0:55:05] } 13. Qg3 { [%eval -0.41] [%clk 0:51:15] } 13... Ra5 { [%eval -0.38] [%clk 0:50:11] } 14. Nb5 { [%eval -0.48] [%clk 0:48:17] } 14... Nc5 { [%eval -0.03] [%clk 0:39:46] } 15. Be3 { [%eval -0.09] [%clk 0:37:57] } 15... Ne4 { [%eval 0.12] [%clk 0:15:32] } 16. Qf3 { [%eval 0.15] [%clk 0:37:45] } 16... f5 { [%eval 0.04] [%clk 0:13:50] } 17. g4? { [%eval -1.48] } { Mistake. Qe2 was best. } { [%clk 0:27:18] } 17... a3? { [%eval 0.0] } { Mistake. c6 was best. } { [%clk 0:09:29] } 18. b4 { [%eval 0.0] [%clk 0:10:51] } 18... Rxb5 { [%eval -0.05] [%clk 0:09:39] } 19. cxb5 { [%eval 0.0] [%clk 0:11:20] } 19... Nxc3 { [%eval -0.28] [%clk 0:09:32] } 20. Rd2 { [%eval -0.71] [%clk 0:11:30] } 20... Ne4 { [%eval -0.22] [%clk 0:03:05] } 21. Rd5? { [%eval -1.42] } { Mistake. Rc2 was best. } { [%clk 0:09:52] } 21... Bf6? { [%eval 0.0] } { Mistake. Qc8 was best. } { [%clk 0:02:27] } 22. Rxf5 { [%eval -0.16] [%clk 0:05:01] } 22... Bb2+?? { [%eval 1.83] } { Blunder. d5 was best. } { [%clk 0:02:49] } 23. Kc2 { [%eval 1.76] [%clk 0:05:00] } 23... Re8 { [%eval 1.68] [%clk 0:03:06] } 24. Bc1 { [%eval 1.6] [%clk 0:03:41] } 24... Bc3? { [%eval 3.19] } { Mistake. d5 was best. } { [%clk 0:00:33] } 25. Rf4 { [%eval 3.06] [%clk 0:02:39] } 25... Bb2?! { [%eval 4.79] } { Inaccuracy. d5 was best. } 26. Rf5?? { [%eval 1.71] } { Blunder. Rxe4 was best. } 26... Bxc1?! { [%eval 2.44] } { Inaccuracy. d5 was best. } 27. Rxc1 { [%eval 1.97] } 27... d5 { [%eval 1.93] } 28. Rd1? { [%eval 0.57] } { Mistake. Qxa3 was best. } 28... c6 { [%eval 0.65] } 29. Kc1?? { [%eval -1.08] } { Blunder. bxc6 was best. } 29... g6 { [%eval -1.39] } 30. Qxa3?? { [%eval -4.42] } { Blunder. Rf4 was best. } 30... Qg5+?? { [%eval 6.46] } { Blunder. gxf5 was best. } 1-0