Event: 2025 Chicago Summer Open
Site: https://www.kingregistration.com/event/chisummeropen25
Date: 2025-06-20
White: Bayarmandakh, Balgan
WhiteTitle: FM
WhiteElo: 2154
Black: Gu, Samuel
BlackElo: 1930
Result: 1-0
ECO: B00
Opening: Pirc Defense
Variant: Standard
TimeControl: 90+30

1. d4 { [%eval 0.17] } 1... d6 { [%eval 0.48] } 2. e4 { [%eval 0.43] } 2... Nf6 { [%eval 0.43] } 3. Nc3 { [%eval 0.38] } 3... e5 { [%eval 0.44] } 4. dxe5 { [%eval 0.26] } 4... dxe5 { [%eval 0.36] } 5. Qxd8+ { [%eval 0.22] } 5... Kxd8 { [%eval 0.32] } 6. Bg5 { [%eval 0.09] } 6... Be6 { [%eval 0.39] } 7. O-O-O+ { [%eval 0.25] [%clk 1:32:50] } 7... Nd7 { [%eval 0.35] [%clk 1:32:50] } 8. f4 { [%eval 0.34] [%clk 1:28:04] } 8... exf4 { [%eval 0.42] [%clk 1:31:40] } 9. Nf3 { [%eval 0.37] [%clk 1:24:55] } 9... Kc8 { [%eval 0.45] [%clk 1:28:31] } 10. Bxf4 { [%eval 0.47] [%clk 1:19:43] } 10... Nh5 { [%eval 0.9] [%clk 1:23:19] } 11. Bd2 { [%eval 0.87] [%clk 1:14:55] } 11... Bd6 { [%eval 1.03] [%clk 1:18:31] } 12. Ng5?! { [%eval 0.29] } { Inaccuracy. Nb5 was best. } { [%clk 1:00:46] } 12... Nf8? { [%eval 1.75] } { Mistake. Nhf6 was best. } { [%clk 1:19:01] } 13. g3 { [%eval 1.7] [%clk 0:59:06] } 13... Nf6 { [%eval 1.75] [%clk 1:15:29] } 14. Nxe6 { [%eval 1.57] [%clk 0:57:14] } 14... Nxe6?! { [%eval 2.33] } { Inaccuracy. fxe6 was best. } { [%clk 1:15:29] } 15. Bh3 { [%eval 2.23] [%clk 0:55:52] } 15... Be5?! { [%eval 3.13] } { Inaccuracy. Rf8 was best. } { [%clk 1:15:35] } 16. Rhf1 { [%eval 3.01] [%clk 0:52:23] } 16... Kb8 { [%eval 3.03] [%clk 1:09:34] } 17. Rde1?? { [%eval 0.87] } { Blunder. Rf5 was best. } { [%clk 0:49:51] } 17... Nc5? { [%eval 2.3] } { Mistake. Re8 was best. } { [%clk 1:09:34] } 18. Bg2? { [%eval 0.7] } { Mistake. Nd5 was best. } { [%clk 0:42:17] } 18... a5 { [%eval 0.71] [%clk 1:10:00] } 19. Nd5 { [%eval 0.78] [%clk 0:42:32] } 19... Re8?! { [%eval 1.35] } { Inaccuracy. Ra6 was best. } { [%clk 1:09:16] } 20. Nxf6 { [%eval 1.29] [%clk 0:40:30] } 20... Bxf6?! { [%eval 2.36] } { Inaccuracy. gxf6 was best. } { [%clk 1:08:26] } 21. e5 { [%eval 2.37] [%clk 0:40:30] } 21... Rxe5?! { [%eval 3.24] } { Inaccuracy. Bxe5 was best. } { [%clk 1:08:25] } 22. Rxe5 { [%eval 3.32] [%clk 0:40:30] } 22... Bxe5 { [%eval 3.25] [%clk 1:08:26] } 23. Rxf7 { [%eval 3.22] [%clk 0:33:36] } 23... a4 { [%eval 4.0] [%clk 1:01:32] } 24. Be3 { [%eval 3.86] [%clk 0:31:18] } 24... Ra5 { [%eval 4.04] [%clk 0:55:59] } 25. Bf1?! { [%eval 2.64] } { Inaccuracy. Rf8+ was best. } { [%clk 0:28:03] } 25... c6 { [%eval 2.77] [%clk 0:53:53] } 26. a3 { [%eval 2.78] [%clk 0:25:57] } 26... Na6?? { [%eval 7.68] } { Blunder. b6 was best. } { [%clk 0:53:53] } 27. Bb6 { [%eval 7.24] [%clk 0:25:57] } 27... Bxb2+? { [%eval #10] } { Checkmate is now unavoidable. Bd6 was best. } { [%clk 0:53:33] } 28. Kxb2 { [%eval #9] [%clk 0:25:57] } 28... Rb5+ { [%eval #7] [%clk 0:53:33] } 29. Bxb5 { [%eval #6] [%clk 0:25:57] } 1-0