Event: Round 1: Alonso Orta, Osiel Alberto - Cesar Acosta, Christian Alejandro
Site: https://lichess.org/broadcast/fide-world-youth-u16-chess-olympiad-2025--matches-1-18/round-1/hoe7G2UC/loRmSlnN
White: Alonso Orta, Osiel Alberto
WhiteTitle: FM
WhiteElo: 2081
Black: Cesar Acosta, Christian Alejandro
BlackElo: 1742
Result: 1-0
ECO: B96
Opening: Sicilian Defense: Najdorf Variation
Variant: Standard
TimeControl: 45+10

1. e4 { [%eval 0.18] [%clk 0:45:14] } 1... c5 { [%eval 0.24] [%clk 0:44:51] } 2. Nf3 { [%eval 0.2] [%clk 0:45:17] } 2... d6 { [%eval 0.31] [%clk 0:44:42] } 3. d4 { [%eval 0.22] [%clk 0:45:19] } 3... cxd4 { [%eval 0.19] [%clk 0:44:47] } 4. Nxd4 { [%eval 0.18] [%clk 0:45:24] } 4... Nf6 { [%eval 0.31] [%clk 0:44:39] } 5. Nc3 { [%eval 0.32] [%clk 0:45:28] } 5... a6 { [%eval 0.25] [%clk 0:44:38] } 6. Bg5 { [%eval 0.0] [%clk 0:45:30] } 6... e6 { [%eval 0.17] [%clk 0:43:56] } 7. f4 { [%eval 0.04] [%clk 0:45:29] } 7... Nbd7 { [%eval 0.2] [%clk 0:44:02] } 8. Qf3 { [%eval 0.22] [%clk 0:45:31] } 8... Be7 { [%eval 0.66] [%clk 0:43:55] } 9. O-O-O { [%eval 0.53] [%clk 0:45:22] } 9... h6 { [%eval 0.69] [%clk 0:43:12] } 10. Bh4 { [%eval 0.52] [%clk 0:42:01] } 10... g5 { [%eval 0.71] [%clk 0:40:08] } 11. fxg5 { [%eval 0.59] [%clk 0:41:28] } 11... hxg5 { [%eval 0.56] [%clk 0:39:43] } 12. Bxg5 { [%eval 0.56] [%clk 0:34:59] } 12... Ne5 { [%eval 0.76] [%clk 0:38:10] } 13. Qe2 { [%eval 0.7] [%clk 0:33:39] } 13... Nfg4?! { [%eval 1.5] } { Inaccuracy. Nxe4 was best. } { [%clk 0:36:50] } 14. Bf4 { [%eval 1.1] [%clk 0:29:11] } 14... Qb6 { [%eval 1.64] [%clk 0:16:50] } 15. g3 { [%eval 1.1] [%clk 0:18:06] } 15... Bd7 { [%eval 1.19] [%clk 0:14:12] } 16. Bg2? { [%eval 0.05] } { Mistake. h3 was best. } { [%clk 0:14:23] } 16... Bf6?? { [%eval 1.98] } { Blunder. Rc8 was best. } { [%clk 0:11:58] } 17. h3 { [%eval 1.98] [%clk 0:12:48] } 17... Ng6 { [%eval 1.82] [%clk 0:11:14] } 18. Nb3?? { [%eval -1.03] } { Blunder. Nf5 was best. } { [%clk 0:04:18] } 18... Nxf4 { [%eval -1.03] [%clk 0:10:56] } 19. gxf4 { [%eval -1.18] [%clk 0:04:07] } 19... Nf2 { [%eval -1.11] [%clk 0:10:37] } 20. Rxd6 { [%eval -1.1] [%clk 0:02:36] } 20... Qxd6 { [%eval -1.2] [%clk 0:08:29] } 21. Qxf2 { [%eval -0.97] [%clk 0:02:37] } 21... Bxc3 { [%eval -1.05] [%clk 0:07:00] } 22. bxc3 { [%eval -1.09] [%clk 0:02:44] } 22... e5?! { [%eval -0.26] } { Inaccuracy. a5 was best. } { [%clk 0:06:03] } 23. f5? { [%eval -1.73] } { Mistake. fxe5 was best. } { [%clk 0:01:36] } 23... Rc8? { [%eval -0.52] } { Mistake. a5 was best. } { [%clk 0:05:05] } 24. Kb2?! { [%eval -1.08] } { Inaccuracy. Qg3 was best. } { [%clk 0:00:30] } 24... b5?! { [%eval 0.0] } { Inaccuracy. a5 was best. } { [%clk 0:04:59] } 25. Rg1?! { [%eval -1.03] } { Inaccuracy. Bf1 was best. } { [%clk 0:00:17] } 25... b4?! { [%eval 0.0] } { Inaccuracy. a5 was best. } { [%clk 0:04:49] } 26. cxb4 { [%eval 0.0] [%clk 0:00:21] } 26... Qxb4 { [%eval 0.0] [%clk 0:04:52] } 27. Qg3 { [%eval 0.0] [%clk 0:00:29] } 27... Qd6 { [%eval 0.03] [%clk 0:02:50] } 28. Rd1 { [%eval 0.0] [%clk 0:00:14] } 28... Qc7 { [%eval 0.1] [%clk 0:02:08] } 29. c4 { [%eval 0.1] [%clk 0:00:14] } 29... Kf8 { [%eval 0.13] [%clk 0:00:42] } 30. Qc3 { [%eval -0.27] [%clk 0:00:16] } 30... f6 { [%eval 0.0] [%clk 0:00:25] } 31. c5 { [%eval -0.18] [%clk 0:00:18] } 31... Ba4?! { [%eval 0.4] } { Inaccuracy. a5 was best. } { [%clk 0:00:28] } 32. Rd5 { [%eval 0.0] [%clk 0:00:14] } 32... Bxb3? { [%eval 1.42] } { Mistake. Bb5 was best. } { [%clk 0:00:22] } 33. axb3 { [%eval 1.05] [%clk 0:00:23] } 33... Ke7 { [%eval 1.55] [%clk 0:00:23] } 34. Qc4 { [%eval 1.62] [%clk 0:00:10] } 34... Qc6?? { [%eval 6.85] } { Blunder. Rhd8 was best. } { [%clk 0:00:14] } 35. Rd6 { [%eval 6.74] [%clk 0:00:13] } 35... Qxc5?? { [%eval #8] } { Checkmate is now unavoidable. Qxd6 was best. } { [%clk 0:00:23] } 36. Qe6+ { [%eval #7] [%clk 0:00:18] } 36... Kf8 { [%eval #7] [%clk 0:00:31] } 37. Qxf6+ { [%eval #6] [%clk 0:00:25] } 37... Kg8 { [%eval #6] [%clk 0:00:40] } 38. Qg6+ { [%eval #5] [%clk 0:00:24] } 38... Kf8 { [%eval #5] [%clk 0:00:48] } 39. Rf6+ { [%eval #4] [%clk 0:00:31] } 39... Ke7 { [%eval #4] [%clk 0:00:35] } 40. Rf7+ { [%eval #3] [%clk 0:00:40] } 40... Ke8 { [%eval #2] [%clk 0:00:20] } 41. Qe6+ { [%eval #1] [%clk 0:00:49] } 1-0