Event: Round 5: Mason, Donald J - Letton, Rob
Site: https://lichess.org/broadcast/2025-british-chess-championships--over-50/round-5/Tl6gwYoB/bPwZutwu
White: Mason, Donald J
WhiteElo: 2015
Black: Letton, Rob
BlackElo: 1711
Result: 1-0
ECO: B27
Opening: Sicilian Defense: Hyperaccelerated Dragon
Variant: Standard

1. e4 { [%eval 0.18] [%clk 1:30:55] } 1... c5 { [%eval 0.24] [%clk 1:30:53] } 2. Nf3 { [%eval 0.2] [%clk 1:31:17] } 2... g6 { [%eval 0.34] [%clk 1:31:01] } 3. c3 { [%eval 0.24] [%clk 1:31:22] } 3... Bg7 { [%eval 0.59] [%clk 1:31:20] } 4. d4 { [%eval 0.47] [%clk 1:31:43] } 4... cxd4 { [%eval 0.5] [%clk 1:31:39] } 5. cxd4 { [%eval 0.48] [%clk 1:32:05] } 5... d5 { [%eval 0.49] [%clk 1:31:56] } 6. e5 { [%eval 0.5] [%clk 1:32:25] } 6... Bg4 { [%eval 0.62] [%clk 1:31:57] } 7. Bb5+ { [%eval 0.81] [%clk 1:32:40] } 7... Nc6 { [%eval 0.61] [%clk 1:30:16] } 8. Bxc6+ { [%eval 0.74] [%clk 1:30:15] } 8... bxc6 { [%eval 0.93] [%clk 1:30:19] } 9. Nbd2 { [%eval 0.92] [%clk 1:30:21] } 9... Qb6 { [%eval 1.1] [%clk 1:25:40] } 10. O-O { [%eval 1.2] [%clk 1:29:58] } 10... e6 { [%eval 1.09] [%clk 1:24:57] } 11. h3 { [%eval 1.23] [%clk 1:27:08] } 11... Bxf3 { [%eval 1.27] [%clk 1:25:03] } 12. Nxf3 { [%eval 1.3] [%clk 1:27:35] } 12... Ne7 { [%eval 1.01] [%clk 1:24:57] } 13. b3 { [%eval 0.96] [%clk 1:27:27] } 13... Nf5 { [%eval 1.48] [%clk 1:10:13] } 14. Ba3 { [%eval 1.38] [%clk 1:21:42] } 14... Bf8 { [%eval 1.43] [%clk 1:04:42] } 15. Bxf8 { [%eval 1.36] [%clk 1:20:32] } 15... Kxf8 { [%eval 1.32] [%clk 1:02:44] } 16. g4 { [%eval 1.45] [%clk 1:19:08] } 16... Ng7? { [%eval 3.07] } { Mistake. Ne7 was best. } { [%clk 0:56:13] } 17. Qc1?! { [%eval 2.2] } { Inaccuracy. Rc1 was best. } { [%clk 1:14:56] } 17... h5 { [%eval 2.71] [%clk 0:55:20] } 18. Qa3+ { [%eval 2.63] [%clk 1:13:12] } 18... Kg8 { [%eval 2.52] [%clk 0:48:00] } 19. Kg2 { [%eval 2.51] [%clk 1:13:13] } 19... Ne8 { [%eval 2.9] [%clk 0:46:08] } 20. Rac1 { [%eval 2.83] [%clk 1:11:53] } 20... hxg4?! { [%eval 4.41] } { Inaccuracy. Qb7 was best. } { [%clk 0:33:02] } 21. hxg4 { [%eval 4.75] [%clk 1:11:36] } 21... Rc8?! { [%eval 7.01] } { Inaccuracy. f5 was best. } { [%clk 0:27:54] } 22. Rh1 { [%eval 6.85] [%clk 1:10:14] } 22... Rxh1 { [%eval 7.26] [%clk 0:26:20] } 23. Rxh1 { [%eval 6.87] [%clk 1:10:41] } 23... Qd8 { [%eval 7.95] [%clk 0:26:28] } 24. Qc1 { [%eval 7.8] [%clk 1:04:31] } 24... f6 { [%eval 10.77] [%clk 0:20:11] } 25. Qh6 { [%eval 10.2] [%clk 0:58:46] } 25... Kf7 { [%eval 9.81] [%clk 0:18:39] } 26. Qh7+ { [%eval 11.42] [%clk 0:53:57] } 26... Ng7 { [%eval 10.22] [%clk 0:17:27] } 27. Rh6 { [%eval 8.58] [%clk 0:53:59] } 27... fxe5? { [%eval #6] } { Checkmate is now unavoidable. Qg8 was best. } { [%clk 0:13:18] } 28. Nxe5+ { [%eval #5] [%clk 0:52:54] } 1-0