Event: Campeonato Nacional Senior 2025
Site: Comité Olímpico Nacional, Coronado, Costa Rica
White: Montero Chavez, Miguel Angel
WhiteElo: 1419
Black: Herrera Retana, Gerardo
BlackElo: 1797
Result: 0-1
ECO: B50
Opening: Sicilian Defense: Modern Variations
Variant: Standard
TimeControl: 90+30

1. e4 { [%eval 0.18] [%clk 1:30:51] } 1... c5 { [%eval 0.25] [%clk 1:29:58] } 2. Nf3 { [%eval 0.2] [%clk 1:30:27] } 2... d6 { [%eval 0.22] [%clk 1:30:10] } 3. Nc3 { [%eval 0.21] [%clk 1:30:10] } 3... Nc6 { [%eval 0.41] [%clk 1:30:15] } 4. Bc4 { [%eval 0.2] [%clk 1:29:29] } 4... e6 { [%eval 0.34] [%clk 1:30:19] } 5. O-O { [%eval 0.11] [%clk 1:29:07] } 5... Nf6 { [%eval 0.21] [%clk 1:30:42] } 6. a3 { [%eval -0.18] [%clk 1:28:45] } 6... Be7 { [%eval 0.0] [%clk 1:30:58] } 7. d3 { [%eval -0.1] [%clk 1:28:05] } 7... O-O { [%eval -0.08] [%clk 1:31:12] } 8. Be3?? { [%eval -3.4] } { Blunder. Re1 was best. } { [%clk 1:26:59] } 8... a6?? { [%eval -0.31] } { Blunder. d5 was best. } { [%clk 1:31:18] } 9. Re1?? { [%eval -3.63] } { Blunder. Ba2 was best. } { [%clk 1:23:36] } 9... b5?? { [%eval -0.32] } { Blunder. d5 was best. } { [%clk 1:31:27] } 10. Ba2 { [%eval -0.35] [%clk 1:22:24] } 10... Bb7 { [%eval -0.28] [%clk 1:31:13] } 11. Ng5 { [%eval -0.62] [%clk 1:19:12] } 11... h6 { [%eval -0.6] [%clk 1:29:56] } 12. Nxe6?? { [%eval -2.54] } { Blunder. Nf3 was best. } { [%clk 1:13:11] } 12... fxe6 { [%eval -2.62] [%clk 1:30:15] } 13. Bxe6+ { [%eval -2.6] [%clk 1:12:54] } 13... Kh8 { [%eval -2.35] [%clk 1:30:35] } 14. Nd5 { [%eval -2.5] [%clk 1:09:40] } 14... Bc8 { [%eval -2.39] [%clk 1:29:20] } 15. Bxc8 { [%eval -2.54] [%clk 1:06:08] } 15... Rxc8 { [%eval -2.66] [%clk 1:29:27] } 16. c3 { [%eval -2.84] [%clk 1:02:29] } 16... Nxd5 { [%eval -2.81] [%clk 1:29:23] } 17. exd5 { [%eval -2.8] [%clk 1:02:24] } 17... Ne5 { [%eval -2.84] [%clk 1:29:20] } 18. Qd2?! { [%eval -3.74] } { Inaccuracy. f4 was best. } { [%clk 0:59:25] } 18... Qe8 { [%eval -3.09] [%clk 1:26:45] } 19. a4? { [%eval -4.92] } { Mistake. f4 was best. } { [%clk 0:50:35] } 19... Qg6 { [%eval -4.85] [%clk 1:26:59] } 20. Kh1 { [%eval -4.86] [%clk 0:45:31] } 20... Nxd3 { [%eval -4.81] [%clk 1:25:52] } 21. Re2 { [%eval -5.09] [%clk 0:43:50] } 21... Bf6 { [%eval -5.05] [%clk 1:23:51] } 22. axb5 { [%eval -4.98] [%clk 0:41:40] } 22... axb5 { [%eval -5.0] [%clk 1:24:10] } 23. Ra7 { [%eval -5.2] [%clk 0:41:19] } 23... Ra8 { [%eval -5.26] [%clk 1:24:10] } 24. Rxa8 { [%eval -5.19] [%clk 0:41:19] } 24... Rxa8 { [%eval -5.15] [%clk 1:20:37] } 25. g3?? { [%eval #-12] } { Checkmate is now unavoidable. h3 was best. } { [%clk 0:36:26] } 25... Ra2?? { [%eval -5.38] } { Lost forced checkmate sequence. Qe4+ was best. } { [%clk 1:23:03] } 26. Bf4 { [%eval -6.19] [%clk 0:29:13] } 26... Rxb2 { [%eval -7.22] [%clk 1:21:55] } 27. Qe3 { [%eval -7.33] [%clk 0:28:15] } 27... Rxe2 { [%eval -7.19] [%clk 1:21:57] } 28. Qxe2 { [%eval -6.52] [%clk 0:28:27] } 28... c4 { [%eval -5.82] [%clk 1:19:32] } 29. Bxd6 { [%eval -5.93] [%clk 0:25:27] } 29... Bxc3 { [%eval -5.99] [%clk 1:18:38] } 30. Bc5?! { [%eval -8.11] } { Inaccuracy. Be7 was best. } { [%clk 0:24:23] } 30... Nxc5 { [%eval -8.14] [%clk 1:18:28] } 0-1