Event: Round 1: Mason, Donald J - Polanyk, John
Site: https://lichess.org/broadcast/2025-british-chess-championships--over-50/round-1/e95wALwx/2BfyRTJ2
White: Mason, Donald J
WhiteElo: 2015
Black: Polanyk, John
BlackElo: 1771
Result: 1-0
ECO: B51
Opening: Sicilian Defense: Moscow Variation
Variant: Standard

1. e4 { [%eval 0.18] [%clk 1:30:55] } 1... c5 { [%eval 0.25] [%clk 1:30:49] } 2. Nf3 { [%eval 0.2] [%clk 1:31:11] } 2... d6 { [%eval 0.31] [%clk 1:31:03] } 3. Bb5+ { [%eval 0.14] [%clk 1:30:36] } 3... Nc6 { [%eval 0.37] [%clk 1:30:45] } 4. O-O { [%eval 0.28] [%clk 1:28:42] } 4... e5 { [%eval 0.71] [%clk 1:27:21] } 5. c3 { [%eval 0.71] [%clk 1:26:37] } 5... Bd7 { [%eval 0.76] [%clk 1:23:13] } 6. d4 { [%eval 0.84] [%clk 1:24:54] } 6... Qc7 { [%eval 0.96] [%clk 1:23:11] } 7. d5 { [%eval 0.95] [%clk 1:19:58] } 7... Nce7 { [%eval 0.98] [%clk 1:22:55] } 8. a4 { [%eval 1.28] [%clk 1:17:54] } 8... h6 { [%eval 1.54] [%clk 1:21:27] } 9. Na3 { [%eval 1.51] [%clk 1:13:12] } 9... Ng6 { [%eval 1.75] [%clk 1:19:52] } 10. b4 { [%eval 1.2] [%clk 1:07:37] } 10... cxb4 { [%eval 1.22] [%clk 0:59:53] } 11. cxb4 { [%eval 1.08] [%clk 1:06:39] } 11... a6? { [%eval 2.41] } { Mistake. Nf6 was best. } { [%clk 1:00:12] } 12. Bxd7+ { [%eval 2.49] [%clk 1:06:10] } 12... Qxd7 { [%eval 2.32] [%clk 0:55:51] } 13. Nc4 { [%eval 2.45] [%clk 0:57:37] } 13... Qd8? { [%eval 4.16] } { Mistake. Qc7 was best. } { [%clk 0:54:44] } 14. a5 { [%eval 4.1] [%clk 0:50:19] } 14... Nf6 { [%eval 4.08] [%clk 0:46:29] } 15. Nb6 { [%eval 4.18] [%clk 0:50:13] } 15... Rb8 { [%eval 4.44] [%clk 0:41:41] } 16. Qa4+ { [%eval 4.24] [%clk 0:50:31] } 16... Ke7 { [%eval 4.53] [%clk 0:40:37] } 17. Re1 { [%eval 3.88] [%clk 0:46:00] } 17... Ne8 { [%eval 4.62] [%clk 0:36:58] } 18. h4 { [%eval 4.67] [%clk 0:35:56] } 18... Rg8 { [%eval 4.57] [%clk 0:33:34] } 19. h5 { [%eval 4.59] [%clk 0:29:19] } 19... Nh8 { [%eval 4.55] [%clk 0:33:49] } 20. Nh4 { [%eval 4.08] [%clk 0:27:08] } 20... g6 { [%eval 3.86] [%clk 0:33:59] } 21. f4 { [%eval 3.54] [%clk 0:26:30] } 21... Bg7 { [%eval 4.29] [%clk 0:32:01] } 22. Bb2 { [%eval 4.2] [%clk 0:21:56] } 22... Nc7?! { [%eval 5.72] } { Inaccuracy. Bf6 was best. } { [%clk 0:23:54] } 23. fxe5 { [%eval 5.67] [%clk 0:20:38] } 23... Bxe5 { [%eval 5.72] [%clk 0:23:28] } 24. Bxe5 { [%eval 5.61] [%clk 0:21:00] } 24... dxe5 { [%eval 5.73] [%clk 0:23:53] } 25. d6+ { [%eval 5.55] [%clk 0:20:51] } 1-0