Event: Round 1: Sierra Castillo, Eyber - Beltran Serna, Ian Samuel
Site: https://lichess.org/broadcast/final-nacional-colombia-intercolegiados-activo-2025--juvenil-masculino/round-1/jMDXnPbw/BjKthjT7
Date: 2025-10-27
White: Sierra Castillo, Eyber
WhiteElo: 1690
Black: Beltran Serna, Ian Samuel
BlackElo: 1958
Result: 0-1
ECO: D04
Opening: Queen's Pawn Game: Colle System
Variant: Standard
TimeControl: 15+10

1. d4 { [%eval 0.17] [%clk 0:15:17] } 1... d5 { [%eval 0.18] [%clk 0:15:10] } 2. Nf3 { [%eval 0.08] [%clk 0:15:22] } 2... Nf6 { [%eval 0.11] [%clk 0:15:15] } 3. e3 { [%eval 0.0] [%clk 0:15:30] } 3... Bg4 { [%eval 0.35] [%clk 0:14:44] } 4. Bd3 { [%eval -0.14] [%clk 0:15:11] } 4... Nbd7 { [%eval 0.0] [%clk 0:14:30] } 5. O-O { [%eval -0.35] [%clk 0:15:06] } 5... Ne4?! { [%eval 0.68] } { Inaccuracy. e5 was best. } { [%clk 0:14:25] } 6. h3 { [%eval 0.45] [%clk 0:15:03] } 6... Bh5 { [%eval 0.53] [%clk 0:14:27] } 7. b3?! { [%eval -0.32] } { Inaccuracy. c4 was best. } { [%clk 0:14:44] } 7... Ndf6?! { [%eval 0.4] } { Inaccuracy. e6 was best. } { [%clk 0:13:54] } 8. Bb2 { [%eval 0.11] [%clk 0:14:25] } 8... g5?! { [%eval 0.83] } { Inaccuracy. e6 was best. } { [%clk 0:13:26] } 9. Be2?! { [%eval -0.24] } { Inaccuracy. g4 was best. } { [%clk 0:12:37] } 9... Rg8? { [%eval 0.89] } { Mistake. e6 was best. } { [%clk 0:12:27] } 10. Ne5?! { [%eval 0.33] } { Inaccuracy. g4 was best. } { [%clk 0:12:11] } 10... Bxe2 { [%eval 0.3] [%clk 0:11:59] } 11. Qxe2 { [%eval 0.34] [%clk 0:12:19] } 11... c6 { [%eval 0.35] [%clk 0:11:45] } 12. Nd2?! { [%eval -0.56] } { Inaccuracy. g4 was best. } { [%clk 0:12:03] } 12... Nxd2 { [%eval -0.34] [%clk 0:11:17] } 13. Qxd2 { [%eval -0.3] [%clk 0:12:12] } 13... g4 { [%eval -0.08] [%clk 0:11:23] } 14. h4 { [%eval -0.48] [%clk 0:10:04] } 14... g3?! { [%eval 0.18] } { Inaccuracy. Ne4 was best. } { [%clk 0:10:58] } 15. fxg3 { [%eval 0.34] [%clk 0:08:50] } 15... Rxg3 { [%eval 0.37] [%clk 0:10:28] } 16. Rf3?! { [%eval -0.31] } { Inaccuracy. Qf2 was best. } { [%clk 0:07:54] } 16... Ne4?! { [%eval 0.78] } { Inaccuracy. Rxf3 was best. } { [%clk 0:08:42] } 17. Qe1?? { [%eval -1.15] } { Blunder. Qd1 was best. } { [%clk 0:07:34] } 17... Rg7 { [%eval -0.93] [%clk 0:08:38] } 18. Ba3 { [%eval -0.92] [%clk 0:06:44] } 18... f6 { [%eval -0.95] [%clk 0:08:22] } 19. Nd3 { [%eval -0.94] [%clk 0:06:50] } 19... Qd7 { [%eval -0.96] [%clk 0:08:06] } 20. Rf4?? { [%eval -3.21] } { Blunder. Nf2 was best. } { [%clk 0:05:25] } 20... Rg8 { [%eval -3.19] [%clk 0:06:12] } 21. Nc5?! { [%eval -4.56] } { Inaccuracy. Nf2 was best. } { [%clk 0:05:29] } 21... Qh3 { [%eval -4.34] [%clk 0:06:14] } 22. Qf1 { [%eval -4.99] [%clk 0:03:12] } 22... Bh6 { [%eval -4.29] [%clk 0:05:58] } 23. Nxe4 { [%eval -4.29] [%clk 0:02:31] } 23... Bxf4 { [%eval -4.21] [%clk 0:05:55] } 24. exf4 { [%eval -4.94] [%clk 0:02:38] } 24... dxe4 { [%eval -4.73] [%clk 0:05:46] } 25. Re1 { [%eval -4.94] [%clk 0:02:26] } 25... f5 { [%eval -5.01] [%clk 0:05:53] } 26. Qf2 { [%eval -5.2] [%clk 0:02:09] } 26... e3 { [%eval -4.31] [%clk 0:05:11] } 27. Rxe3?! { [%eval -5.66] } { Inaccuracy. Kf1 was best. } { [%clk 0:02:02] } 27... Rxg2+ { [%eval -5.83] [%clk 0:05:19] } 28. Qxg2 { [%eval -5.73] [%clk 0:02:07] } 28... Qxe3+ { [%eval -5.75] [%clk 0:05:28] } 29. Qf2 { [%eval -5.95] [%clk 0:02:10] } 29... Qe4 { [%eval -5.8] [%clk 0:05:22] } 30. Kh2 { [%eval -5.84] [%clk 0:01:44] } 30... O-O-O { [%eval -5.54] [%clk 0:05:27] } 31. c3 { [%eval -5.87] [%clk 0:01:40] } 31... Rg8 { [%eval -5.82] [%clk 0:05:31] } 32. c4 { [%eval -5.8] [%clk 0:01:05] } 32... Rg4 { [%eval -5.81] [%clk 0:04:46] } 33. Bc1 { [%eval -5.81] [%clk 0:01:13] } 33... Rg6 { [%eval -5.66] [%clk 0:04:21] } 34. Qe3?? { [%eval #-1] } { Checkmate is now unavoidable. d5 was best. } { [%clk 0:00:20] } 34... Qg2# { [%clk 0:04:18] } 0-1