Event: Biel Chess Festival 2025
Date: 2025-07-16
White: Jahn, Thomas
WhiteElo: 1964
Black: Van Bogaert, Olivier
BlackElo: 1793
Result: 1-0
ECO: B32
Opening: Sicilian Defense: Kalashnikov Variation
Variant: Standard

1. e4 { [%eval 0.18] [%clk 1:26:00] } 1... c5 { [%eval 0.25] [%clk 1:30:45] } 2. Nf3 { [%eval 0.2] [%clk 1:26:21] } 2... Nc6 { [%eval 0.3] [%clk 1:30:57] } 3. d4 { [%eval 0.27] [%clk 1:26:43] } 3... cxd4 { [%eval 0.27] [%clk 1:31:20] } 4. Nxd4 { [%eval 0.21] [%clk 1:27:05] } 4... e5 { [%eval 0.42] [%clk 1:31:22] } 5. Nb5 { [%eval 0.35] [%clk 1:27:26] } 5... d6 { [%eval 0.37] [%clk 1:31:41] } 6. c4 { [%eval 0.37] [%clk 1:26:53] } 6... Be6 { [%eval 0.44] [%clk 1:31:46] } 7. N1c3 { [%eval 0.35] [%clk 1:26:44] } 7... a6 { [%eval 0.3] [%clk 1:31:49] } 8. Na3 { [%eval 0.37] [%clk 1:27:08] } 8... g6 { [%eval 0.4] [%clk 1:31:50] } 9. Be2 { [%eval 0.37] [%clk 1:26:21] } 9... Bg7 { [%eval 0.36] [%clk 1:31:54] } 10. Bg4 { [%eval -0.01] [%clk 1:22:28] } 10... Bxg4 { [%eval 0.12] [%clk 1:23:31] } 11. Qxg4 { [%eval 0.13] [%clk 1:22:36] } 11... Nf6 { [%eval 0.25] [%clk 1:23:50] } 12. Qd1 { [%eval 0.27] [%clk 1:22:33] } 12... O-O { [%eval 0.3] [%clk 1:23:12] } 13. O-O { [%eval 0.3] [%clk 1:22:26] } 13... Nd4 { [%eval 0.22] [%clk 1:17:43] } 14. Nc2 { [%eval 0.24] [%clk 1:19:51] } 14... Nxc2 { [%eval 0.62] [%clk 1:13:49] } 15. Qxc2 { [%eval 0.67] [%clk 1:20:13] } 15... Rc8 { [%eval 1.04] [%clk 1:13:24] } 16. b3?! { [%eval 0.43] } { Inaccuracy. Qe2 was best. } { [%clk 1:14:30] } 16... b5 { [%eval 0.5] [%clk 1:06:31] } 17. cxb5? { [%eval -0.78] } { Mistake. Bg5 was best. } { [%clk 1:12:11] } 17... axb5?! { [%eval 0.0] } { Inaccuracy. d5 was best. } { [%clk 1:06:47] } 18. Qd3 { [%eval 0.0] [%clk 1:11:45] } 18... b4 { [%eval -0.01] [%clk 1:02:14] } 19. Nd5 { [%eval 0.0] [%clk 1:06:41] } 19... Nxd5 { [%eval 0.0] [%clk 0:56:06] } 20. Qxd5 { [%eval 0.0] [%clk 1:06:57] } 20... Rc5 { [%eval 0.0] [%clk 0:47:32] } 21. Qb7 { [%eval 0.0] [%clk 1:06:12] } 21... Qb8 { [%eval 0.0] [%clk 0:47:18] } 22. Qxb8 { [%eval -0.1] [%clk 1:05:58] } 22... Rxb8 { [%eval -0.14] [%clk 0:47:43] } 23. Be3 { [%eval -0.19] [%clk 1:06:17] } 23... Rc2 { [%eval 0.0] [%clk 0:47:20] } 24. Rfc1 { [%eval 0.07] [%clk 1:06:23] } 24... Rbc8 { [%eval 0.09] [%clk 0:45:04] } 25. Kf1 { [%eval 0.11] [%clk 1:06:47] } 25... f5 { [%eval 0.12] [%clk 0:33:14] } 26. f3 { [%eval 0.0] [%clk 0:56:38] } 26... f4 { [%eval 0.39] [%clk 0:19:55] } 27. Bd2 { [%eval 0.52] [%clk 0:56:41] } 27... d5?? { [%eval 3.09] } { Blunder. R2c5 was best. } { [%clk 0:20:03] } 28. Rxc2 { [%eval 3.14] [%clk 0:55:01] } 28... Rxc2 { [%eval 3.11] [%clk 0:20:27] } 29. Bxb4 { [%eval 2.98] [%clk 0:55:27] } 29... d4?! { [%eval 4.32] } { Inaccuracy. dxe4 was best. } { [%clk 0:20:40] } 30. a4 { [%eval 4.48] [%clk 0:55:02] } 30... Rb2 { [%eval 5.49] [%clk 0:14:53] } 31. a5 { [%eval 5.32] [%clk 0:55:01] } 31... d3?! { [%eval 7.71] } { Inaccuracy. Rxb3 was best. } { [%clk 0:13:26] } 32. a6 { [%eval 8.18] [%clk 0:55:16] } 32... d2 { [%eval 8.32] [%clk 0:08:25] } 33. a7 { [%eval 8.01] [%clk 0:55:25] } 33... d1=Q+ { [%clk 0:08:13] } 34. Rxd1 { [%clk 0:55:46] } 34... Ra2 { [%clk 0:07:35] } 35. Rd8+ { [%clk 0:56:09] } 1-0