Event: Round 4: Vaidyanathan, Sathya - Vassiliou, Chris
Date: 2025-06-29
White: Vaidyanathan, Sathya
WhiteElo: 1878
Black: Vassiliou, Chris
BlackElo: 1909
Result: 0-1
ECO: B23
Opening: Sicilian Defense: Closed, Traditional
Variant: Standard
TimeControl: 110+10

1. e4 { [%eval 0.18] [%clk 1:50:18] } 1... c5 { [%eval 0.25] [%clk 1:50:13] } 2. Nc3 { [%eval 0.26] [%clk 1:50:23] } 2... Nc6 { [%eval 0.16] [%clk 1:50:17] } 3. Bb5 { [%eval 0.0] [%clk 1:50:29] } 3... Nd4 { [%eval 0.0] [%clk 1:50:21] } 4. Nf3 { [%eval 0.0] [%clk 1:50:35] } 4... g6 { [%eval 0.25] [%clk 1:49:56] } 5. Nxd4 { [%eval 0.23] [%clk 1:49:03] } 5... cxd4 { [%eval 0.16] [%clk 1:50:00] } 6. Ne2 { [%eval 0.0] [%clk 1:48:50] } 6... Bg7 { [%eval 0.14] [%clk 1:49:51] } 7. c3 { [%eval 0.09] [%clk 1:47:55] } 7... a6 { [%eval 0.03] [%clk 1:44:52] } 8. Bd3 { [%eval 0.09] [%clk 1:44:13] } 8... dxc3 { [%eval 0.15] [%clk 1:43:13] } 9. dxc3 { [%eval 0.14] [%clk 1:40:35] } 9... d6 { [%eval 0.13] [%clk 1:42:35] } 10. O-O { [%eval 0.1] [%clk 1:39:30] } 10... Nf6 { [%eval 0.09] [%clk 1:42:14] } 11. f4 { [%eval -0.14] [%clk 1:36:39] } 11... Qb6+ { [%eval 0.0] [%clk 1:33:29] } 12. Kh1 { [%eval 0.02] [%clk 1:34:37] } 12... Ng4 { [%eval 0.45] [%clk 1:27:09] } 13. Qe1 { [%eval 0.53] [%clk 1:30:19] } 13... Bd7 { [%eval 0.56] [%clk 1:24:45] } 14. b4? { [%eval -0.85] } { Mistake. a4 was best. } { [%clk 1:17:53] } 14... Rc8?! { [%eval -0.01] } { Inaccuracy. Bb5 was best. } { [%clk 1:17:54] } 15. Bd2?! { [%eval -0.67] } { Inaccuracy. a4 was best. } { [%clk 1:12:17] } 15... Bb5 { [%eval -0.61] [%clk 1:10:25] } 16. Bxb5+ { [%eval -0.63] [%clk 1:09:11] } 16... Qxb5 { [%eval -0.53] [%clk 1:08:31] } 17. h3 { [%eval -0.55] [%clk 1:08:26] } 17... Nf6 { [%eval -0.56] [%clk 1:07:10] } 18. Nd4 { [%eval -0.56] [%clk 1:01:19] } 18... Qc4 { [%eval -0.62] [%clk 1:00:40] } 19. e5 { [%eval -0.59] [%clk 0:35:48] } 19... dxe5 { [%eval -0.63] [%clk 0:58:54] } 20. fxe5 { [%eval -0.7] [%clk 0:33:22] } 20... Nd5 { [%eval -0.67] [%clk 0:57:43] } 21. Rf3 { [%eval -1.03] [%clk 0:29:46] } 21... O-O { [%eval -0.92] [%clk 0:55:17] } 22. Qg3 { [%eval -0.85] [%clk 0:19:57] } 22... e6 { [%eval -0.63] [%clk 0:52:44] } 23. a4? { [%eval -1.93] } { Mistake. a3 was best. } { [%clk 0:11:55] } 23... Nxb4 { [%eval -1.93] [%clk 0:42:42] } 24. Nf5? { [%eval -3.67] } { Mistake. Rb1 was best. } { [%clk 0:08:11] } 24... exf5 { [%eval -3.6] [%clk 0:40:58] } 25. cxb4 { [%eval -3.65] [%clk 0:08:03] } 25... Qd4 { [%eval -3.57] [%clk 0:38:39] } 26. Rd1 { [%eval -3.83] [%clk 0:02:04] } 26... Rcd8 { [%eval -3.11] [%clk 0:38:10] } 27. Rf2 { [%eval -3.86] [%clk 0:00:56] } 27... Bxe5 { [%eval -3.97] [%clk 0:37:09] } 28. Qg5?? { [%eval #-9] } { Checkmate is now unavoidable. Qf3 was best. } { [%clk 0:00:44] } 28... Qxf2 { [%eval #-10] [%clk 0:34:55] } 0-1