Event: Round 4: Zerfass, Otfried - Klettke, Wolfgang
Date: 2025-07-10
White: Zerfass, Otfried
WhiteElo: 1875
Black: Klettke, Wolfgang
BlackElo: 1924
Result: 0-1
ECO: B23
Opening: Sicilian Defense: Grand Prix Attack
Variant: Standard

1. e4 { [%eval 0.18] [%clk 1:30:56] } 1... c5 { [%eval 0.25] [%clk 1:28:03] } 2. Nc3 { [%eval 0.26] [%clk 1:31:16] } 2... Nc6 { [%eval 0.16] [%clk 1:27:19] } 3. f4 { [%eval -0.09] [%clk 1:31:38] } 3... g6 { [%eval -0.04] [%clk 1:27:29] } 4. Nf3 { [%eval -0.19] [%clk 1:32:02] } 4... Bg7 { [%eval -0.16] [%clk 1:27:54] } 5. Bb5 { [%eval -0.29] [%clk 1:31:35] } 5... Nd4 { [%eval -0.21] [%clk 1:26:01] } 6. O-O { [%eval -0.23] [%clk 1:31:53] } 6... Nxb5 { [%eval -0.06] [%clk 1:22:02] } 7. Nxb5 { [%eval -0.15] [%clk 1:32:13] } 7... Nf6 { [%eval 0.17] [%clk 1:22:10] } 8. Qe2 { [%eval -0.11] [%clk 1:28:38] } 8... O-O { [%eval -0.07] [%clk 1:22:14] } 9. c4 { [%eval -0.13] [%clk 1:28:32] } 9... d6 { [%eval -0.12] [%clk 1:20:17] } 10. d4 { [%eval -0.37] [%clk 1:21:53] } 10... a6 { [%eval -0.48] [%clk 1:07:20] } 11. Nc3 { [%eval -0.44] [%clk 1:21:31] } 11... cxd4 { [%eval -0.47] [%clk 1:05:19] } 12. Nxd4 { [%eval -0.47] [%clk 1:06:24] } 12... Qc7 { [%eval -0.12] [%clk 0:55:20] } 13. Kh1? { [%eval -1.57] } { Mistake. Be3 was best. } { [%clk 0:50:57] } 13... Qc5?! { [%eval -0.51] } { Inaccuracy. Bg4 was best. } { [%clk 0:43:00] } 14. Nb3 { [%eval -0.7] [%clk 0:47:33] } 14... Qc6 { [%eval -0.35] [%clk 0:38:48] } 15. Nd4 { [%eval -0.49] [%clk 0:24:38] } 15... Qb6 { [%eval 0.0] [%clk 0:29:52] } 16. Nf3 { [%eval -0.23] [%clk 0:21:52] } 16... Bg4 { [%eval -0.1] [%clk 0:24:32] } 17. Be3 { [%eval -0.22] [%clk 0:19:29] } 17... Qa5 { [%eval 0.07] [%clk 0:21:37] } 18. a3 { [%eval 0.04] [%clk 0:16:15] } 18... Rac8 { [%eval 0.04] [%clk 0:20:59] } 19. Rad1 { [%eval -0.36] [%clk 0:11:28] } 19... Qc7 { [%eval -0.04] [%clk 0:18:27] } 20. b3 { [%eval -0.35] [%clk 0:10:08] } 20... b5 { [%eval -0.27] [%clk 0:17:44] } 21. Nd5?? { [%eval -2.05] } { Blunder. e5 was best. } { [%clk 0:09:28] } 21... Nxd5 { [%eval -2.02] [%clk 0:17:22] } 22. cxd5 { [%eval -2.01] [%clk 0:08:43] } 22... Qc2 { [%eval -2.11] [%clk 0:16:57] } 23. Qxc2 { [%eval -1.95] [%clk 0:08:23] } 23... Rxc2 { [%eval -1.99] [%clk 0:17:25] } 24. Rc1 { [%eval -2.44] [%clk 0:08:23] } 24... Rb2? { [%eval -0.8] } { Mistake. Rfc8 was best. } { [%clk 0:13:34] } 25. Rc6?? { [%eval -3.15] } { Blunder. Nd4 was best. } { [%clk 0:05:15] } 25... Rxb3 { [%eval -3.29] [%clk 0:13:35] } 26. Bc1 { [%eval -3.26] [%clk 0:04:06] } 26... Bxf3 { [%eval -2.77] [%clk 0:12:03] } 27. Rxf3?! { [%eval -4.16] } { Inaccuracy. gxf3 was best. } { [%clk 0:03:58] } 27... Rb1 { [%eval -4.15] [%clk 0:11:38] } 28. Rf1 { [%eval -4.43] [%clk 0:03:50] } 28... a5 { [%eval -4.24] [%clk 0:11:25] } 29. g4 { [%eval -4.51] [%clk 0:03:30] } 29... b4 { [%eval -4.43] [%clk 0:10:25] } 30. axb4 { [%eval -4.43] [%clk 0:03:56] } 30... axb4 { [%eval -4.48] [%clk 0:10:53] } 31. Kg2 { [%eval -4.39] [%clk 0:04:15] } 31... Rb8 { [%eval -4.31] [%clk 0:10:46] } 32. f5 { [%eval -5.21] [%clk 0:02:10] } 32... b3 { [%eval -5.34] [%clk 0:10:32] } 33. fxg6 { [%eval -5.31] [%clk 0:00:52] } 33... hxg6 { [%eval -5.27] [%clk 0:09:40] } 0-1