Event: Biel Chess Festival 2025
Date: 2025-07-16
White: Mueller, Andrin
WhiteElo: 1884
Black: Kopp, Guenter
BlackElo: 1747
Result: 1-0
ECO: B20
Opening: Sicilian Defense: Mengarini Variation
Variant: Standard

1. e4 { [%eval 0.18] [%clk 1:30:55] } 1... c5 { [%eval 0.25] [%clk 1:30:18] } 2. a3 { [%eval -0.09] [%clk 1:31:07] } 2... Nc6 { [%eval 0.0] [%clk 1:30:03] } 3. b4 { [%eval -0.36] [%clk 1:31:29] } 3... cxb4 { [%eval 0.04] [%clk 1:27:31] } 4. axb4 { [%eval 0.0] [%clk 1:31:53] } 4... e6?! { [%eval 0.84] } { Inaccuracy. Nxb4 was best. } { [%clk 1:22:09] } 5. b5 { [%eval 0.95] [%clk 1:29:40] } 5... Nce7 { [%eval 1.08] [%clk 1:18:51] } 6. Nf3 { [%eval 0.94] [%clk 1:20:16] } 6... Nf6 { [%eval 1.25] [%clk 1:14:43] } 7. e5 { [%eval 1.21] [%clk 1:17:48] } 7... Nfd5 { [%eval 1.73] [%clk 1:09:56] } 8. c4 { [%eval 1.75] [%clk 1:17:03] } 8... Nf4? { [%eval 3.13] } { Mistake. Nb4 was best. } { [%clk 1:07:51] } 9. d4 { [%eval 3.36] [%clk 1:14:39] } 9... Nfg6 { [%eval 3.37] [%clk 1:07:17] } 10. h4 { [%eval 3.37] [%clk 1:11:03] } 10... h5 { [%eval 3.32] [%clk 1:06:38] } 11. Ng5?! { [%eval 2.21] } { Inaccuracy. Bg5 was best. } { [%clk 1:05:02] } 11... Nf5 { [%eval 2.21] [%clk 1:01:17] } 12. g3? { [%eval 0.83] } { Mistake. c5 was best. } { [%clk 1:00:34] } 12... Bb4+?! { [%eval 1.65] } { Inaccuracy. d6 was best. } { [%clk 0:59:41] } 13. Bd2 { [%eval 1.62] [%clk 0:59:53] } 13... Qe7? { [%eval 3.4] } { Mistake. Bxd2+ was best. } { [%clk 0:57:58] } 14. Ra4 { [%eval 2.67] [%clk 0:57:46] } 14... Bxd2+ { [%eval 2.56] [%clk 0:54:21] } 15. Qxd2? { [%eval 1.3] } { Mistake. Nxd2 was best. } { [%clk 0:56:18] } 15... f6 { [%eval 1.74] [%clk 0:51:26] } 16. Nf3?! { [%eval 0.97] } { Inaccuracy. Ne4 was best. } { [%clk 0:51:33] } 16... b6 { [%eval 1.05] [%clk 0:49:15] } 17. Bg2 { [%eval 0.99] [%clk 0:46:06] } 17... Bb7 { [%eval 0.86] [%clk 0:49:00] } 18. O-O { [%eval 0.92] [%clk 0:45:16] } 18... a5?! { [%eval 1.85] } { Inaccuracy. fxe5 was best. } { [%clk 0:48:15] } 19. bxa6 { [%eval 1.48] [%clk 0:42:45] } 19... Rxa6 { [%eval 1.28] [%clk 0:48:03] } 20. Rxa6 { [%eval 1.21] [%clk 0:42:09] } 20... Bxa6 { [%eval 1.2] [%clk 0:48:25] } 21. Qa2 { [%eval 1.0] [%clk 0:41:39] } 21... Bb7 { [%eval 1.2] [%clk 0:45:57] } 22. exf6 { [%eval 1.37] [%clk 0:38:38] } 22... gxf6 { [%eval 1.47] [%clk 0:44:30] } 23. Nbd2?! { [%eval 0.71] } { Inaccuracy. d5 was best. } { [%clk 0:34:55] } 23... d6?? { [%eval 2.62] } { Blunder. d5 was best. } { [%clk 0:38:55] } 24. Qa7?? { [%eval 0.2] } { Blunder. Re1 was best. } { [%clk 0:33:18] } 24... Bxf3 { [%eval 0.24] [%clk 0:38:22] } 25. Qxe7+ { [%eval 0.02] [%clk 0:31:09] } 25... Kxe7 { [%eval 0.02] [%clk 0:38:22] } 26. Nxf3 { [%eval 0.0] [%clk 0:30:56] } 26... Rc8 { [%eval 0.07] [%clk 0:37:50] } 27. Rc1 { [%eval -0.01] [%clk 0:29:29] } 27... e5?? { [%eval 3.73] } { Blunder. d5 was best. } { [%clk 0:32:19] } 28. dxe5?? { [%eval 0.0] } { Blunder. Bh3 was best. } { [%clk 0:29:01] } 28... dxe5?! { [%eval 0.8] } { Inaccuracy. Nxe5 was best. } { [%clk 0:31:01] } 29. Bh3 { [%eval 0.7] [%clk 0:26:58] } 29... Ke6 { [%eval 0.8] [%clk 0:30:21] } 30. Nd2 { [%eval 0.74] [%clk 0:26:15] } 30... Ne7 { [%eval 1.22] [%clk 0:26:14] } 31. Rb1 { [%eval 1.22] [%clk 0:19:17] } 31... Rb8 { [%eval 0.9] [%clk 0:24:40] } 32. Ne4?! { [%eval 0.34] } { Inaccuracy. Rb5 was best. } { [%clk 0:16:57] } 32... Kf7 { [%eval 0.4] [%clk 0:22:17] } 33. c5 { [%eval 0.07] [%clk 0:12:30] } 33... b5 { [%eval 0.15] [%clk 0:21:46] } 34. c6 { [%eval 0.14] [%clk 0:08:25] } 34... Kg6? { [%eval 1.77] } { Mistake. Rc8 was best. } { [%clk 0:21:25] } 35. c7 { [%eval 1.76] [%clk 0:05:31] } 35... Rb6 { [%eval 2.1] [%clk 0:18:00] } 36. Bxf5+? { [%eval 0.8] } { Mistake. Nc3 was best. } { [%clk 0:03:01] } 36... Kxf5 { [%eval 0.73] [%clk 0:17:50] } 37. Rxb5 { [%eval 0.19] [%clk 0:02:30] } 37... Rc6?? { [%eval 4.47] } { Blunder. Rxb5 was best. } { [%clk 0:14:27] } 38. Rc5 { [%eval 4.36] [%clk 0:02:42] } 38... Rxc5 { [%eval 5.24] [%clk 0:13:52] } 39. Nxc5 { [%eval 4.9] [%clk 0:03:05] } 39... Nc8 { [%eval 5.13] [%clk 0:14:13] } 40. f3 { [%eval 5.12] [%clk 0:01:37] } 40... Kg6 { [%eval 5.17] [%clk 0:13:12] } 41. Kf2 { [%eval 4.98] [%clk 0:01:19] } 41... Kf7 { [%eval 5.46] [%clk 0:13:24] } 42. Ke3?! { [%eval 3.64] } { Inaccuracy. g4 was best. } { [%clk 0:00:46] } 42... Ke7 { [%eval 4.48] [%clk 0:13:46] } 43. f4 { [%eval 4.98] [%clk 0:24:38] } 43... Kd6 { [%eval 4.5] [%clk 0:41:35] } 44. Na6 { [%eval 4.42] [%clk 0:23:46] } 44... Kd7 { [%eval 4.54] [%clk 0:41:36] } 45. fxe5 { [%eval 5.57] [%clk 0:23:11] } 45... fxe5 { [%eval 5.54] [%clk 0:41:06] } 46. Ke4 { [%eval 5.34] [%clk 0:23:06] } 46... Ke6 { [%eval 5.54] [%clk 0:41:04] } 47. Nc5+ { [%eval 5.33] [%clk 0:20:39] } 1-0