Event: Round 2: Siebarth, Marco - Derr, Oleg
Date: 2025-07-17
White: Siebarth, Marco
WhiteElo: 2051
Black: Derr, Oleg
BlackElo: 2130
Result: 0-1
ECO: B32
Opening: Sicilian Defense: Kalashnikov Variation
Variant: Standard

1. e4 { [%eval 0.18] [%clk 1:29:38] } 1... c5 { [%eval 0.25] [%clk 1:30:56] } 2. Nf3 { [%eval 0.2] [%clk 1:29:37] } 2... Nc6 { [%eval 0.3] [%clk 1:31:19] } 3. d4 { [%eval 0.27] [%clk 1:30:01] } 3... cxd4 { [%eval 0.27] [%clk 1:31:43] } 4. Nxd4 { [%eval 0.21] [%clk 1:30:27] } 4... e5 { [%eval 0.42] [%clk 1:32:09] } 5. Nb5 { [%eval 0.35] [%clk 1:30:16] } 5... d6 { [%eval 0.37] [%clk 1:32:32] } 6. N1c3 { [%eval 0.25] [%clk 1:30:21] } 6... a6 { [%eval 0.38] [%clk 1:32:53] } 7. Na3 { [%eval 0.3] [%clk 1:30:44] } 7... Be6 { [%eval 0.33] [%clk 1:33:18] } 8. Nc4 { [%eval 0.46] [%clk 1:28:07] } 8... Rb8 { [%eval 0.55] [%clk 1:33:42] } 9. a4 { [%eval 0.56] [%clk 1:25:56] } 9... Nb4 { [%eval 0.58] [%clk 1:34:05] } 10. Be3?! { [%eval -0.13] } { Inaccuracy. Nd5 was best. } { [%clk 1:21:09] } 10... Nf6 { [%eval -0.01] [%clk 1:34:26] } 11. Be2 { [%eval -0.4] [%clk 1:10:06] } 11... Qc7 { [%eval -0.34] [%clk 1:34:47] } 12. Na3? { [%eval -1.76] } { Mistake. b3 was best. } { [%clk 0:50:21] } 12... d5 { [%eval -1.77] [%clk 1:31:56] } 13. exd5 { [%eval -1.74] [%clk 0:48:06] } 13... Nbxd5 { [%eval -1.64] [%clk 1:32:19] } 14. Nxd5 { [%eval -1.6] [%clk 0:48:09] } 14... Nxd5 { [%eval -1.67] [%clk 1:32:37] } 15. Bd2 { [%eval -1.42] [%clk 0:41:01] } 15... Be7 { [%eval -1.38] [%clk 1:31:12] } 16. O-O { [%eval -1.36] [%clk 0:41:00] } 16... O-O { [%eval -1.34] [%clk 1:31:24] } 17. c4 { [%eval -1.18] [%clk 0:37:32] } 17... Nf4 { [%eval -1.23] [%clk 1:28:24] } 18. Bxf4 { [%eval -1.24] [%clk 0:36:25] } 18... exf4 { [%eval -1.24] [%clk 1:28:46] } 19. b3?! { [%eval -2.28] } { Inaccuracy. Qc2 was best. } { [%clk 0:33:51] } 19... Rfd8 { [%eval -2.4] [%clk 1:27:09] } 20. Qc1 { [%eval -2.41] [%clk 0:32:40] } 20... Rbc8 { [%eval -1.95] [%clk 1:26:26] } 21. Rd1?! { [%eval -3.06] } { Inaccuracy. Ra2 was best. } { [%clk 0:30:44] } 21... Rxd1+ { [%eval -3.12] [%clk 1:22:36] } 22. Qxd1 { [%eval -3.46] [%clk 0:30:35] } 22... Rd8 { [%eval -3.47] [%clk 1:22:41] } 23. Qc2?! { [%eval -5.13] } { Inaccuracy. Qe1 was best. } { [%clk 0:13:16] } 23... Qe5 { [%eval -5.14] [%clk 1:21:17] } 24. Ra2?! { [%eval -7.44] } { Inaccuracy. Rd1 was best. } { [%clk 0:05:45] } 24... f3 { [%eval -7.18] [%clk 1:20:31] } 25. gxf3? { [%eval #-5] } { Checkmate is now unavoidable. h4 was best. } { [%clk 0:05:40] } 25... Qg5+ { [%eval #-4] [%clk 1:18:56] } 26. Kh1 { [%eval #-4] [%clk 0:05:37] } 26... Bh3 { [%eval #-3] [%clk 1:19:19] } 0-1