Event: Biel Chess Festival 2025
Date: 2025-07-15
White: Klas, Friedrich Guenther
WhiteElo: 1686
Black: Leuenberger, Urs
BlackElo: 1859
Result: 0-1
ECO: A46
Opening: Indian Defense: London System
Variant: Standard

1. d4 { [%eval 0.17] [%clk 1:29:33] } 1... Nf6 { [%eval 0.19] [%clk 1:30:33] } 2. Nf3 { [%eval 0.11] [%clk 1:29:51] } 2... e6 { [%eval 0.14] [%clk 1:30:34] } 3. Bf4 { [%eval 0.03] [%clk 1:30:11] } 3... d5 { [%eval 0.1] [%clk 1:30:33] } 4. e3 { [%eval 0.0] [%clk 1:29:51] } 4... Bd6 { [%eval 0.07] [%clk 1:28:55] } 5. Bg3 { [%eval 0.03] [%clk 1:24:00] } 5... Bxg3 { [%eval 0.41] [%clk 1:27:11] } 6. fxg3?! { [%eval -0.57] } { Inaccuracy. hxg3 was best. } { [%clk 1:24:28] } 6... Nbd7 { [%eval -0.35] [%clk 1:26:39] } 7. Bd3 { [%eval -0.36] [%clk 1:22:10] } 7... c5 { [%eval -0.27] [%clk 1:26:13] } 8. c3 { [%eval -0.73] [%clk 1:22:38] } 8... Qb6 { [%eval -0.7] [%clk 1:22:50] } 9. Qc1 { [%eval -0.86] [%clk 1:19:51] } 9... Qc7 { [%eval -0.35] [%clk 1:21:23] } 10. Nbd2 { [%eval -0.32] [%clk 1:18:34] } 10... Ng4 { [%eval 0.12] [%clk 1:15:04] } 11. Nf1? { [%eval -1.22] } { Mistake. e4 was best. } { [%clk 1:14:45] } 11... e5 { [%eval -0.91] [%clk 1:14:31] } 12. dxe5?! { [%eval -1.86] } { Inaccuracy. h3 was best. } { [%clk 1:09:08] } 12... Ndxe5 { [%eval -1.68] [%clk 1:12:32] } 13. Bb5+?! { [%eval -2.41] } { Inaccuracy. Nxe5 was best. } { [%clk 1:08:11] } 13... Bd7 { [%eval -2.36] [%clk 1:12:17] } 14. Bxd7+ { [%eval -2.62] [%clk 1:08:38] } 14... Qxd7 { [%eval -2.65] [%clk 1:12:23] } 15. Nxe5 { [%eval -2.76] [%clk 1:05:20] } 15... Nxe5 { [%eval -2.66] [%clk 1:12:36] } 16. Qc2 { [%eval -2.66] [%clk 1:05:25] } 16... c4 { [%eval -2.5] [%clk 1:11:24] } 17. O-O-O { [%eval -2.71] [%clk 1:05:02] } 17... O-O { [%eval -2.46] [%clk 1:09:55] } 18. Rd4 { [%eval -2.24] [%clk 1:05:16] } 18... Nd3+ { [%eval -2.5] [%clk 1:07:40] } 19. Kb1 { [%eval -2.42] [%clk 1:05:16] } 19... Rfe8 { [%eval -2.34] [%clk 1:07:03] } 20. Nd2 { [%eval -2.39] [%clk 1:01:56] } 20... b5 { [%eval -1.77] [%clk 0:57:54] } 21. Rf1?? { [%eval -4.87] } { Blunder. e4 was best. } { [%clk 1:01:19] } 21... Qb7? { [%eval -2.5] } { Mistake. Rxe3 was best. } { [%clk 0:57:22] } 22. Rf5? { [%eval -4.93] } { Mistake. Nb3 was best. } { [%clk 1:01:22] } 22... Rxe3 { [%eval -4.69] [%clk 0:54:46] } 23. Nf3 { [%eval -4.64] [%clk 1:00:51] } 23... Rae8 { [%eval -4.61] [%clk 0:53:38] } 24. a3? { [%eval -10.1] } { Mistake. Qd2 was best. } { [%clk 1:01:06] } 24... Re1+ { [%eval -10.51] [%clk 0:53:28] } 25. Ka2 { [%eval -10.88] [%clk 1:01:35] } 25... Nc1+?! { [%eval -5.85] } { Inaccuracy. b4 was best. } { [%clk 0:53:37] } 26. Ka1?? { [%eval #-2] } { Checkmate is now unavoidable. Qxc1 was best. } { [%clk 1:02:01] } 26... Nb3+ { [%eval #-1] [%clk 0:53:57] } 0-1