Event: Round 5: Joshua Posthuma - Andrew Tang
Date: 2021-06-19
White: Joshua Posthuma
WhiteTitle: FM
Black: Andrew Tang
BlackTitle: GM
Result: 0-1
ECO: E04
Opening: Catalan Opening: Open Defense
Variant: Standard

1. d4 { [%eval 0.0] [%clk 1:28:10] } 1... d5 { [%eval 0.27] [%clk 1:30:51] } 2. c4 { [%eval 0.0] [%clk 1:28:32] } 2... e6 { [%eval 0.31] [%clk 1:31:10] } 3. Nf3 { [%eval 0.0] [%clk 1:28:43] } 3... Nf6 { [%eval 0.0] [%clk 1:31:32] } 4. g3 { [%eval 0.09] [%clk 1:28:58] } 4... dxc4 { [%eval 0.4] [%clk 1:31:38] } 5. Bg2 { [%eval 0.13] [%clk 1:28:53] } 5... Nc6 { [%eval 0.41] [%clk 1:31:59] } 6. Qa4 { [%eval 0.64] [%clk 1:28:48] } 6... Bd7 { [%eval 0.48] [%clk 1:31:33] } 7. Qxc4 { [%eval 0.5] [%clk 1:28:53] } 7... Na5 { [%eval 0.51] [%clk 1:31:59] } 8. Qc3 { [%eval 0.43] [%clk 1:25:49] } 8... Nd5 { [%eval 0.66] [%clk 1:29:32] } 9. Qd2 { [%eval 0.4] [%clk 1:24:25] } 9... Bb4 { [%eval 0.49] [%clk 1:25:45] } 10. Nc3 { [%eval 0.57] [%clk 1:24:48] } 10... O-O { [%eval 0.5] [%clk 1:25:51] } 11. O-O { [%eval 0.46] [%clk 1:16:58] } 11... c5 { [%eval 0.23] } 12. e4 { [%eval 0.56] [%clk 1:07:14] } 12... cxd4 { [%eval 0.5] [%clk 1:12:08] } 13. Qxd4?! { [%eval -0.21] } { Inaccuracy. exd5 was best. } { [%clk 0:57:30] } 13... Nc6 { [%eval -0.26] [%clk 1:05:01] } 14. Qc4 { [%eval 0.0] [%clk 0:55:28] } 14... Nxc3 { [%eval -0.1] [%clk 1:03:38] } 15. bxc3 { [%eval -0.14] [%clk 0:55:50] } 15... Be7 { [%eval -0.21] [%clk 1:03:57] } 16. e5 { [%eval -0.05] [%clk 0:38:19] } 16... Qa5 { [%eval -0.52] [%clk 0:59:58] } 17. Rb1 { [%eval 0.0] [%clk 0:34:33] } 17... Rfc8 { [%eval -0.1] [%clk 0:57:37] } 18. Qe2?! { [%eval -0.74] } { Inaccuracy. Qg4 was best. } { [%clk 0:28:35] } 18... Rc7?! { [%eval -0.08] } { Inaccuracy. Rab8 was best. } { [%clk 0:54:43] } 19. c4?! { [%eval -0.72] } { Inaccuracy. Nd4 was best. } { [%clk 0:25:30] } 19... Rac8 { [%eval -0.6] [%clk 0:53:46] } 20. Bg5?! { [%eval -1.34] } { Inaccuracy. Rd1 was best. } { [%clk 0:18:47] } 20... Bf8 { [%eval -1.34] [%clk 0:51:01] } 21. Rfd1 { [%eval -1.15] [%clk 0:08:46] } 21... Qa6?! { [%eval -0.53] } { Inaccuracy. h6 was best. } { [%clk 0:49:26] } 22. Qe4 { [%eval -1.0] [%clk 0:05:21] } 22... Na5?! { [%eval -0.32] } { Inaccuracy. Nb4 was best. } { [%clk 0:48:17] } 23. Bf1 { [%eval -0.63] [%clk 0:04:28] } 23... Bc6 { [%eval -0.27] [%clk 0:35:57] } 24. Qg4 { [%eval -0.43] [%clk 0:04:56] } 24... b6 { [%eval -0.51] [%clk 0:35:40] } 25. Nd4?? { [%eval -2.2] } { Blunder. Bd8 was best. } { [%clk 0:03:21] } 25... Ba8 { [%eval -1.96] [%clk 0:35:14] } 26. Bd3? { [%eval -3.84] } { Mistake. c5 was best. } { [%clk 0:00:44] } 26... Nxc4 { [%eval -3.56] [%clk 0:34:38] } 27. Nb5? { [%eval -6.75] } { Mistake. Bf4 was best. } { [%clk 0:00:32] } 27... Qb7 { [%eval -7.06] [%clk 0:34:35] } 28. f3 { [%eval -7.13] [%clk 0:00:32] } 28... Nxe5 { [%eval -7.52] [%clk 0:33:57] } 29. Bxh7+ { [%eval -10.71] [%clk 0:00:34] } 29... Kxh7 { [%eval -10.71] [%clk 0:34:11] } 30. Qh5+ { [%eval -12.56] [%clk 0:00:59] } 30... Kg8 { [%eval -12.63] [%clk 0:34:38] } 31. Nxc7 { [%eval -12.9] [%clk 0:01:19] } 31... Nxf3+ { [%eval -12.3] [%clk 0:34:39] } 32. Kf1 { [%eval -13.91] [%clk 0:01:20] } 32... Rxc7 { [%eval -14.82] [%clk 0:33:40] } 33. Rd8 { [%eval -13.62] [%clk 0:01:39] } 33... Nxg5 { [%eval -21.84] [%clk 0:33:20] } 34. Qxg5 { [%eval #-13] [%clk 0:01:47] } 34... Qh1+?! { [%eval -14.32] } { Lost forced checkmate sequence. Qf3+ was best. } { [%clk 0:33:41] } 35. Ke2 { [%eval -16.66] [%clk 0:02:03] } 35... Rc2+ { [%eval -14.01] [%clk 0:34:04] } 36. Kd3?! { [%eval #-1] } { Checkmate is now unavoidable. Rd2 was best. } { [%clk 0:02:23] } 36... Qe4# { [%clk 0:33:55] } 37. Kxe4 0-1