Event: Biel Chess Festival 2025
Date: 2025-07-19
White: Kalbermatter, Philipp
WhiteElo: 1908
Black: Ehrsam, Andreas
BlackElo: 1774
Result: 1-0
ECO: B28
Opening: Sicilian Defense: O'Kelly Variation, Maróczy Bind
Variant: Standard

1. e4 { [%eval 0.18] [%clk 1:30:51] } 1... c5 { [%eval 0.25] [%clk 1:30:51] } 2. Nf3 { [%eval 0.2] [%clk 1:30:52] } 2... a6 { [%eval 0.47] [%clk 1:31:08] } 3. c4 { [%eval 0.52] [%clk 1:19:52] } 3... Nc6 { [%eval 0.34] [%clk 1:29:52] } 4. d4 { [%eval 0.46] [%clk 1:17:13] } 4... cxd4 { [%eval 0.57] [%clk 1:29:44] } 5. Nxd4 { [%eval 0.32] [%clk 1:17:21] } 5... e6 { [%eval 0.6] [%clk 1:28:45] } 6. Nxc6 { [%eval 0.46] [%clk 1:14:28] } 6... bxc6 { [%eval 0.54] [%clk 1:28:53] } 7. Nc3 { [%eval 0.56] [%clk 1:12:27] } 7... d6 { [%eval 0.65] [%clk 1:27:14] } 8. Be2 { [%eval 0.73] [%clk 1:10:04] } 8... Nf6 { [%eval 0.77] [%clk 1:25:38] } 9. O-O { [%eval 0.77] [%clk 1:07:24] } 9... Be7 { [%eval 0.83] [%clk 1:25:52] } 10. Be3 { [%eval 0.57] [%clk 1:04:13] } 10... c5 { [%eval 0.79] [%clk 1:23:01] } 11. e5?! { [%eval 0.24] } { Inaccuracy. f4 was best. } { [%clk 0:59:57] } 11... dxe5 { [%eval 0.2] [%clk 1:17:21] } 12. Qxd8+ { [%eval 0.27] [%clk 1:00:02] } 12... Kxd8 { [%eval 0.19] [%clk 1:17:08] } 13. Na4 { [%eval 0.21] [%clk 0:56:59] } 13... Nd7 { [%eval 0.26] [%clk 1:16:49] } 14. Rfd1 { [%eval 0.15] [%clk 0:52:56] } 14... Ke8 { [%eval 0.46] [%clk 1:16:34] } 15. Bf3 { [%eval 0.47] [%clk 0:51:47] } 15... Rb8? { [%eval 2.2] } { Mistake. Ra7 was best. } { [%clk 1:16:44] } 16. Bc6 { [%eval 2.33] [%clk 0:50:57] } 16... f5? { [%eval 4.07] } { Mistake. Rb7 was best. } { [%clk 1:15:33] } 17. f3?? { [%eval 1.56] } { Blunder. Bxc5 was best. } { [%clk 0:41:23] } 1-0