Event: Round 4: Classen, Marnin - Nguyen Truong An Khang
Date: 2025-04-13
White: Classen, Marnin
WhiteElo: 1724
Black: Nguyen Truong An Khang
BlackElo: 1862
Result: 0-1
ECO: B10
Opening: Caro-Kann Defense: Two Knights Attack
Variant: Standard
TimeControl: 15+5

1. e4 { [%eval 0.18] [%clk 0:15:09] } 1... c6 { [%eval 0.23] [%clk 0:15:02] } 2. Nc3 { [%eval 0.21] [%clk 0:15:08] } 2... d5 { [%eval 0.32] [%clk 0:15:02] } 3. Nf3 { [%eval 0.2] [%clk 0:15:14] } 3... dxe4 { [%eval 0.16] [%clk 0:15:04] } 4. Nxe4 { [%eval 0.12] [%clk 0:15:17] } 4... Nf6 { [%eval 0.21] [%clk 0:15:07] } 5. Qe2 { [%eval 0.23] [%clk 0:15:18] } 5... Nxe4 { [%eval 0.24] [%clk 0:15:08] } 6. Qxe4 { [%eval 0.11] [%clk 0:15:21] } 6... Nd7 { [%eval 0.24] [%clk 0:15:10] } 7. Bc4 { [%eval 0.34] [%clk 0:15:21] } 7... Nf6 { [%eval 0.24] [%clk 0:15:13] } 8. Qe2 { [%eval 0.07] [%clk 0:15:22] } 8... e6?! { [%eval 0.62] } { Inaccuracy. Bf5 was best. } { [%clk 0:15:05] } 9. d4 { [%eval 0.69] [%clk 0:15:23] } 9... Be7 { [%eval 0.65] [%clk 0:15:07] } 10. Bf4 { [%eval 0.57] [%clk 0:15:22] } 10... O-O { [%eval 0.76] [%clk 0:15:09] } 11. O-O-O { [%eval 0.58] [%clk 0:15:22] } 11... b5 { [%eval 0.5] [%clk 0:14:58] } 12. Bd3 { [%eval 0.4] [%clk 0:15:26] } 12... Nd5 { [%eval 0.41] [%clk 0:14:50] } 13. Bg3?! { [%eval -0.47] } { Inaccuracy. Bd2 was best. } { [%clk 0:14:56] } 13... Qa5 { [%eval -0.08] [%clk 0:14:36] } 14. Kb1 { [%eval -0.08] [%clk 0:14:59] } 14... Nb4 { [%eval -0.06] [%clk 0:14:33] } 15. a3 { [%eval -0.09] [%clk 0:15:02] } 15... Nd5?! { [%eval 0.86] } { Inaccuracy. Nxd3 was best. } { [%clk 0:14:36] } 16. Be4?? { [%eval -0.83] } { Blunder. Ne5 was best. } { [%clk 0:14:54] } 16... b4 { [%eval -0.93] [%clk 0:14:02] } 17. Bxd5? { [%eval -2.44] } { Mistake. axb4 was best. } { [%clk 0:14:56] } 17... cxd5 { [%eval -2.56] [%clk 0:14:05] } 18. axb4 { [%eval -2.59] [%clk 0:14:58] } 18... Qxb4?! { [%eval -1.72] } { Inaccuracy. Bxb4 was best. } { [%clk 0:14:05] } 19. Ne5 { [%eval -1.58] [%clk 0:14:56] } 19... Bb7?! { [%eval -0.81] } { Inaccuracy. Qa4 was best. } { [%clk 0:13:11] } 20. h4?! { [%eval -1.41] } { Inaccuracy. Qg4 was best. } { [%clk 0:14:51] } 20... a5 { [%eval -1.46] [%clk 0:13:14] } 21. c3 { [%eval -1.82] [%clk 0:14:32] } 21... Qb3 { [%eval -1.68] [%clk 0:12:18] } 22. Qc2 { [%eval -1.62] [%clk 0:14:22] } 22... a4 { [%eval -1.56] [%clk 0:12:10] } 23. Bf4 { [%eval -1.88] [%clk 0:14:16] } 23... Rfc8 { [%eval -1.99] [%clk 0:11:49] } 24. Nd7?! { [%eval -2.77] } { Inaccuracy. Nf3 was best. } { [%clk 0:14:03] } 24... Qb5 { [%eval -2.97] [%clk 0:11:43] } 25. Ne5 { [%eval -3.34] [%clk 0:14:01] } 25... a3 { [%eval -3.0] [%clk 0:11:33] } 26. Nd3?? { [%eval -6.12] } { Blunder. b3 was best. } { [%clk 0:13:27] } 26... axb2 { [%eval -6.07] [%clk 0:11:15] } 27. Qxb2 { [%eval -5.72] [%clk 0:13:26] } 27... Qa4 { [%eval -6.37] [%clk 0:10:14] } 28. Nc1 { [%eval -6.46] [%clk 0:11:58] } 28... Ba6 { [%eval -6.27] [%clk 0:09:32] } 29. Qa2 { [%eval -6.86] [%clk 0:11:15] } 29... Ba3 { [%eval -5.91] [%clk 0:08:46] } 30. Qc2?? { [%eval #-6] } { Checkmate is now unavoidable. Qb3 was best. } { [%clk 0:10:41] } 30... Rab8+ { [%eval #-5] [%clk 0:08:21] } 31. Bxb8 { [%eval #-5] [%clk 0:10:37] } 31... Rxb8+ { [%eval #-4] [%clk 0:08:24] } 0-1