Event: Round 5: Marchenkov, Lorenzo - Costalonga, Riccardo
Date: 2024-07-02
White: Marchenkov, Lorenzo
WhiteElo: 1780
Black: Costalonga, Riccardo
BlackElo: 2001
Result: 0-1
ECO: B40
Opening: Sicilian Defense: Delayed Alapin Variation, with e6
Variant: Standard

1. e4 { [%eval 0.15] [%clk 1:30:46] } 1... c5 { [%eval 0.25] [%clk 1:30:46] } 2. Nf3 { [%eval 0.17] [%clk 1:31:11] } 2... e6 { [%eval 0.28] [%clk 1:31:08] } 3. c3 { [%eval 0.14] [%clk 1:31:13] } 3... Nf6 { [%eval 0.2] [%clk 1:31:27] } 4. e5 { [%eval 0.24] [%clk 1:31:34] } 4... Nd5 { [%eval 0.22] [%clk 1:31:49] } 5. g3 { [%eval 0.0] [%clk 1:31:49] } 5... Nc6 { [%eval 0.12] [%clk 1:31:51] } 6. Bg2 { [%eval 0.07] [%clk 1:32:09] } 6... Qc7 { [%eval 0.44] [%clk 1:30:42] } 7. O-O { [%eval 0.29] [%clk 1:32:09] } 7... d6 { [%eval 0.38] [%clk 1:29:46] } 8. exd6 { [%eval 0.21] [%clk 1:31:10] } 8... Bxd6 { [%eval 0.2] [%clk 1:30:04] } 9. d4 { [%eval 0.0] [%clk 1:30:13] } 9... O-O { [%eval 0.16] [%clk 1:27:27] } 10. c4 { [%eval 0.14] [%clk 1:27:17] } 10... Nb6 { [%eval 0.28] [%clk 1:23:49] } 11. dxc5 { [%eval 0.0] [%clk 1:18:04] } 11... Bxc5 { [%eval 0.0] [%clk 1:23:06] } 12. b3 { [%eval 0.05] [%clk 1:17:38] } 12... e5 { [%eval 0.0] [%clk 1:20:22] } 13. Nc3 { [%eval 0.01] [%clk 1:15:07] } 13... Rd8 { [%eval 0.31] [%clk 1:17:31] } 14. Qe2 { [%eval 0.19] [%clk 1:13:45] } 14... Bg4 { [%eval 0.25] [%clk 1:14:33] } 15. Nb5 { [%eval 0.01] [%clk 1:00:35] } 15... Qe7 { [%eval 0.0] [%clk 1:14:20] } 16. Qe4? { [%eval -1.46] } { Mistake. Be3 was best. } { [%clk 0:52:09] } 16... f5 { [%eval -1.32] [%clk 1:09:16] } 17. Qb1?! { [%eval -1.92] } { Inaccuracy. Qe1 was best. } { [%clk 0:51:08] } 17... Bxf3 { [%eval -1.57] [%clk 1:05:02] } 18. Bxf3 { [%eval -1.78] [%clk 0:51:31] } 18... e4 { [%eval -1.9] [%clk 1:04:25] } 19. Be2 { [%eval -1.68] [%clk 0:48:51] } 19... a6 { [%eval -1.82] [%clk 1:03:37] } 20. Nc3 { [%eval -1.63] [%clk 0:48:52] } 20... Bd4 { [%eval -1.63] [%clk 1:03:10] } 21. Bb2 { [%eval -1.6] [%clk 0:48:27] } 21... Qe5 { [%eval -1.56] [%clk 0:59:42] } 22. Qc1 { [%eval -1.49] [%clk 0:46:14] } 22... Rf8 { [%eval -1.37] [%clk 0:55:25] } 23. Rb1?? { [%eval -3.74] } { Blunder. Kg2 was best. } { [%clk 0:45:52] } 23... f4 { [%eval -3.6] [%clk 0:55:03] } 24. Nd5 { [%eval -3.96] [%clk 0:46:13] } 24... f3 { [%eval -4.12] [%clk 0:46:21] } 25. Bxf3 { [%eval -3.92] [%clk 0:45:28] } 25... exf3 { [%eval -3.91] [%clk 0:46:10] } 26. Nxb6 { [%eval -4.69] [%clk 0:45:50] } 26... Qh5 { [%eval -4.29] [%clk 0:45:38] } 27. h4 { [%eval -4.2] [%clk 0:43:15] } 27... Bxb6 { [%eval -4.26] [%clk 0:45:31] } 0-1