Event: Hong Kong International Open Chess Championship 2023
Site: St. Benedict School, Choi Hung, Kowloon, Hong Kong
Date: 2023-12-26
White: Chen, Yufei
WhiteElo: 1288
Black: Song, Yihang
Result: 1-0
ECO: B20
Opening: Sicilian Defense: Mengarini Variation
Variant: Standard

1. e4 { [%eval 0.2] [%clk 1:30:50] } 1... c5 { [%eval 0.33] } 2. a3 { [%eval -0.11] [%clk 1:31:19] } 2... Nc6 { [%eval 0.04] [%clk 1:30:45] } 3. b4?! { [%eval -0.55] } { Inaccuracy. Nf3 was best. } 3... cxb4 { [%eval -0.13] } 4. axb4 { [%eval 0.0] } 4... Nxb4 { [%eval 0.0] } 5. c3 { [%eval -0.12] [%clk 1:32:45] } 5... Nc6 { [%eval 0.0] [%clk 1:32:11] } 6. d4 { [%eval -0.18] [%clk 1:33:14] } 6... d5 { [%eval 0.0] [%clk 1:31:51] } 7. exd5 { [%eval 0.0] [%clk 1:33:42] } 7... Qxd5 { [%eval 0.13] [%clk 1:31:50] } 8. Na3 { [%eval 0.32] [%clk 1:34:10] } 8... Nf6? { [%eval 1.53] } { Mistake. Qa5 was best. } { [%clk 1:17:46] } 9. Nb5 { [%eval 1.83] [%clk 1:32:43] } 9... Qd8 { [%eval 2.07] [%clk 1:15:46] } 10. d5 { [%eval 2.06] [%clk 1:30:00] } 10... Ne5?! { [%eval 3.3] } { Inaccuracy. Bg4 was best. } { [%clk 1:16:15] } 11. Bf4 { [%eval 3.12] [%clk 1:27:37] } 11... Nfd7 { [%eval 3.78] [%clk 1:16:44] } 12. Nf3 { [%eval 3.93] [%clk 1:23:39] } 12... f6?! { [%eval 5.16] } { Inaccuracy. g5 was best. } { [%clk 1:17:12] } 13. Nfd4 { [%eval 5.26] [%clk 1:21:05] } 13... Nb6 { [%eval 5.45] [%clk 1:08:29] } 14. Bxe5 { [%eval 5.75] } 14... fxe5 { [%eval 5.78] [%clk 1:08:58] } 15. Qh5+ { [%eval 5.99] [%clk 1:22:02] } 15... g6 { [%eval 5.66] [%clk 1:08:06] } 16. Qxe5 { [%eval 6.06] [%clk 1:22:23] } 16... Rg8 { [%eval 6.97] [%clk 1:00:30] } 17. Nc7+ { [%eval 6.93] [%clk 1:22:06] } 17... Kf7 { [%eval 6.98] [%clk 1:00:25] } 18. Qf4+ { [%eval 6.7] [%clk 1:20:21] } 18... Bf5?! { [%eval 10.34] } { Inaccuracy. Kg7 was best. } { [%clk 0:58:04] } 19. Nxf5 { [%eval 10.22] [%clk 1:19:15] } 19... g5?! { [%eval #3] } { Checkmate is now unavoidable. Qxd5 was best. } { [%clk 0:52:54] } 20. Nh6+? { [%eval 8.2] } { Lost forced checkmate sequence. Nd6+ was best. } { [%clk 1:17:02] } 20... Kg6 { [%eval 8.35] [%clk 0:52:29] } 21. Qf7+ { [%eval #12] [%clk 1:14:43] } 21... Kxh6 { [%eval #12] [%clk 0:52:56] } 22. Qxg8?? { [%eval 2.28] } { Lost forced checkmate sequence. h4 was best. } { [%clk 1:06:16] } 22... Qxc7 { [%eval 2.42] [%clk 0:53:12] } 23. Qe6+ { [%eval 2.37] [%clk 0:57:41] } 23... Kg7 { [%eval 2.49] [%clk 0:53:36] } 24. Qe3?? { [%eval 0.4] } { Blunder. Rc1 was best. } { [%clk 0:53:24] } 24... Nxd5 { [%eval 0.22] [%clk 0:52:25] } 25. Qxg5+ { [%eval 0.0] [%clk 0:53:37] } 25... Kh8 { [%eval 0.1] [%clk 0:52:45] } 26. c4 { [%eval -0.27] [%clk 0:53:09] } 26... Bg7 { [%eval -0.18] [%clk 0:52:28] } 27. Ra3 { [%eval -0.43] [%clk 0:46:42] } 27... Qd6 { [%eval 0.0] [%clk 0:44:46] } 28. Rb3?? { [%eval -3.19] } { Blunder. Rd3 was best. } { [%clk 0:39:29] } 28... Nc3?? { [%eval -0.23] } { Blunder. Nf4 was best. } { [%clk 0:41:35] } 29. Be2?? { [%eval -4.71] } { Blunder. Qd2 was best. } { [%clk 0:37:14] } 29... Rd8?? { [%eval 0.0] } { Blunder. Bh6 was best. } { [%clk 0:41:01] } 30. Qc1 { [%eval 0.0] [%clk 0:37:30] } 30... Nxe2?! { [%eval 0.78] } { Inaccuracy. Qd4 was best. } { [%clk 0:31:13] } 31. Kxe2 { [%eval 0.88] [%clk 0:37:21] } 31... Qe6+ { [%eval 0.79] [%clk 0:31:14] } 32. Kf1 { [%eval 0.85] [%clk 0:29:31] } 32... Qg4 { [%eval 1.25] [%clk 0:27:50] } 33. f3 { [%eval 1.38] [%clk 0:28:48] } 33... Qd4 { [%eval 1.55] [%clk 0:27:58] } 34. g3 { [%eval 2.14] [%clk 0:23:32] } 34... b5?! { [%eval 3.28] } { Inaccuracy. b6 was best. } { [%clk 0:19:43] } 35. cxb5 { [%eval 3.03] [%clk 0:20:53] } 35... Qd5 { [%eval 3.36] [%clk 0:19:22] } 36. Qc2 { [%eval 3.74] [%clk 0:19:07] } 36... Qe6 { [%eval 4.26] [%clk 0:19:50] } 37. Rd3? { [%eval 2.37] } { Mistake. Kg2 was best. } { [%clk 0:17:29] } 37... Rc8? { [%eval 4.01] } { Mistake. Qh3+ was best. } { [%clk 0:19:21] } 38. Qd1 { [%eval 3.98] [%clk 0:17:44] } 38... Qc4 { [%eval 4.7] [%clk 0:19:00] } 39. Kg2 { [%eval 4.63] [%clk 0:18:06] } 39... Qa2+ { [%eval 5.3] [%clk 0:18:50] } 40. Rd2 { [%eval 5.2] [%clk 0:18:28] } 40... Qa5 { [%eval 5.22] [%clk 0:19:07] } 41. Rc2 { [%eval 5.1] } 41... Rd8 { [%eval 5.18] [%clk 0:19:36] } 42. Qe2 { [%eval 5.12] [%clk 0:17:04] } 42... Bf6 { [%eval 5.1] [%clk 0:18:25] } 43. Rhc1 { [%eval 5.06] [%clk 0:17:30] } 43... Kg7 { [%eval 5.05] [%clk 0:18:47] } 44. f4 { [%eval 4.82] [%clk 0:14:17] } 44... Rd4 { [%eval 5.31] [%clk 0:18:53] } 45. Qg4+ { [%eval 5.95] [%clk 0:13:43] } 45... Kf7 { [%eval 6.02] [%clk 0:19:22] } 46. Rc8 { [%eval 6.08] [%clk 0:13:40] } 46... Qd2+ { [%eval 6.58] [%clk 0:19:14] } 47. Kh3 { [%eval 6.39] [%clk 0:13:58] } 1-0