Event: Biel Chess Festival 2025 MTO
Site: Biel, Switzerland
Date: 2025-07-17
White: Schaffner, David
WhiteElo: 1980
Black: Maria, Lia-Alexandra
BlackTitle: WFM
BlackElo: 2120
Result: 0-1
ECO: B95
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 1:40:48] } 2. Nf3 { [%eval 0.2] [%clk 1:41:15] } 2... d6 { [%eval 0.31] [%clk 1:41:12] } 3. d4 { [%eval 0.22] [%clk 1:41:17] } 3... cxd4 { [%eval 0.19] [%clk 1:41:30] } 4. Nxd4 { [%eval 0.18] [%clk 1:41:38] } 4... Nf6 { [%eval 0.31] [%clk 1:41:55] } 5. Nc3 { [%eval 0.32] [%clk 1:41:38] } 5... a6 { [%eval 0.28] [%clk 1:42:19] } 6. Bg5 { [%eval 0.0] [%clk 1:40:18] } 6... e6 { [%eval 0.17] [%clk 1:42:29] } 7. Qd2 { [%eval 0.0] [%clk 1:38:05] } 7... Nbd7 { [%eval 0.26] [%clk 1:42:05] } 8. O-O-O { [%eval 0.25] [%clk 1:27:40] } 8... Qc7 { [%eval 0.39] [%clk 1:41:54] } 9. f4 { [%eval -0.08] [%clk 0:59:44] } 9... Be7 { [%eval 0.23] [%clk 1:36:47] } 10. Be2 { [%eval -0.31] [%clk 0:37:53] } 10... O-O?! { [%eval 0.36] } { Inaccuracy. b5 was best. } { [%clk 1:35:01] } 11. Bf3 { [%eval 0.49] [%clk 0:31:47] } 11... Nb6 { [%eval 0.58] [%clk 1:28:36] } 12. g4?! { [%eval -0.08] } { Inaccuracy. h4 was best. } { [%clk 0:22:42] } 12... Nc4 { [%eval -0.06] [%clk 1:26:31] } 13. Qd3 { [%eval -0.12] [%clk 0:22:59] } 13... Bd7 { [%eval -0.16] [%clk 1:24:54] } 14. h4?! { [%eval -0.74] } { Inaccuracy. Bxf6 was best. } { [%clk 0:22:21] } 14... Rac8 { [%eval -0.5] [%clk 1:20:00] } 15. Rdg1?! { [%eval -1.56] } { Inaccuracy. b3 was best. } { [%clk 0:17:12] } 15... b5 { [%eval -1.31] [%clk 1:18:56] } 16. Bd1? { [%eval -3.21] } { Mistake. b3 was best. } { [%clk 0:11:12] } 16... b4 { [%eval -3.35] [%clk 1:09:36] } 17. Nce2 { [%eval -3.33] [%clk 0:10:54] } 17... Qa5 { [%eval -3.38] [%clk 1:09:21] } 18. Kb1 { [%eval -3.28] [%clk 0:09:55] } 18... Nxb2 { [%eval -3.35] [%clk 1:01:44] } 19. Kxb2 { [%eval -3.36] [%clk 0:10:10] } 19... Rc3 { [%eval -3.18] [%clk 1:01:51] } 20. Nxc3?? { [%eval -7.01] } { Blunder. f5 was best. } { [%clk 0:08:51] } 20... Qa3+ { [%eval -6.87] [%clk 1:02:09] } 0-1