Event: Biel Chess Festival 2025 MTO
Site: Biel, Switzerland
Date: 2025-07-15
White: Federer, Colin
WhiteTitle: FM
WhiteElo: 2303
Black: Stevens, Christian
BlackElo: 2050
Result: 1-0
ECO: B90
Opening: Sicilian Defense: Najdorf Variation
Variant: Standard
TimeControl: 100 min 40 moves + 30 min Rest + 30 sec per move

1. e4 { [%eval 0.18] [%clk 1:40:55] } 1... c5 { [%eval 0.25] [%clk 1:40:51] } 2. Nf3 { [%eval 0.2] [%clk 1:41:19] } 2... d6 { [%eval 0.31] [%clk 1:41:14] } 3. d4 { [%eval 0.22] [%clk 1:41:44] } 3... cxd4 { [%eval 0.19] [%clk 1:41:38] } 4. Nxd4 { [%eval 0.18] [%clk 1:42:08] } 4... Nf6 { [%eval 0.31] [%clk 1:42:00] } 5. Nc3 { [%eval 0.32] [%clk 1:42:31] } 5... a6 { [%eval 0.28] [%clk 1:41:45] } 6. f3 { [%eval 0.13] [%clk 1:42:44] } 6... e6 { [%eval 0.27] [%clk 1:39:31] } 7. g4 { [%eval 0.31] [%clk 1:42:58] } 7... b5 { [%eval 0.46] [%clk 1:39:36] } 8. g5 { [%eval 0.61] [%clk 1:42:20] } 8... Nfd7 { [%eval 0.62] [%clk 1:39:59] } 9. Be3 { [%eval 0.59] [%clk 1:40:14] } 9... Nb6 { [%eval 0.43] [%clk 1:37:39] } 10. a3 { [%eval 0.52] [%clk 1:35:33] } 10... N8d7 { [%eval 0.58] [%clk 1:36:47] } 11. h4 { [%eval 0.47] [%clk 1:33:38] } 11... Bb7 { [%eval 0.59] [%clk 1:36:39] } 12. Qd2 { [%eval 0.53] [%clk 1:23:11] } 12... Ne5 { [%eval 0.49] [%clk 1:32:09] } 13. b3 { [%eval 0.53] [%clk 1:21:51] } 13... Rc8 { [%eval 1.01] [%clk 1:31:12] } 14. f4 { [%eval 1.03] [%clk 1:07:55] } 14... Ng4 { [%eval 1.04] [%clk 1:02:57] } 15. Bg1 { [%eval 0.75] [%clk 1:06:11] } 15... Qc7?! { [%eval 1.79] } { Inaccuracy. h5 was best. } { [%clk 0:58:05] } 16. Rh3 { [%eval 1.92] [%clk 1:03:52] } 16... b4? { [%eval 3.51] } { Mistake. Be7 was best. } { [%clk 0:56:20] } 17. axb4 { [%eval 3.8] [%clk 1:01:44] } 17... d5 { [%eval 3.7] [%clk 0:54:17] } 18. b5?! { [%eval 2.72] } { Inaccuracy. Bxa6 was best. } { [%clk 0:55:59] } 18... dxe4? { [%eval 4.51] } { Mistake. a5 was best. } { [%clk 0:47:06] } 19. bxa6 { [%eval 4.72] [%clk 0:54:00] } 19... e3 { [%eval 4.69] [%clk 0:45:05] } 20. Bxe3 { [%eval 4.79] [%clk 0:53:26] } 20... Bb4 { [%eval 5.15] [%clk 0:43:31] } 21. Ndb5 { [%eval 5.11] [%clk 0:52:37] } 21... Qxc3 { [%eval 6.14] [%clk 0:36:57] } 22. Nxc3 { [%eval 5.83] [%clk 0:40:29] } 22... Nxe3 { [%eval 7.01] [%clk 0:26:55] } 23. axb7 { [%eval 6.98] [%clk 0:50:22] } 23... Rxc3?? { [%eval #9] } { Checkmate is now unavoidable. O-O was best. } { [%clk 0:26:41] } 24. b8=Q+ { [%eval #8] [%clk 0:49:52] } 24... Rc8 { [%eval #11] [%clk 0:26:07] } 25. Bb5+ { [%eval #10] [%clk 0:50:47] } 1-0