[Event "National K-12 Grade Championships: 11th Grade"] [Site "National Harbor, MD"] [Date "2024-12-08"] [Round "6.6"] [White "Gao, Marvin"] [Black "Zhou, Liran"] [Result "0-1"] [WhiteElo "2363"] [WhiteTitle "CM"] [WhiteFideId "30920175"] [BlackElo "2468"] [BlackTitle "IM"] [BlackFideId "30931967"] [Annotator "Lang, JJ"] [Variant "Standard"] [ECO "B90"] [Opening "Sicilian Defense: Najdorf Variation, English Attack"] [StudyName "2024 National K-12 Grade Championships"] [ChapterName "Gao, Marvin - Zhou, Liran"] [ChapterURL "https://lichess.org/study/BpCvdq2G/VyetKxjI"] [Orientation "white"] 1. e4 { [%clk 1:20:00] } 1... c5 { [%clk 1:29:58] } 2. Nf3 { [%clk 1:20:00] } 2... d6 { [%clk 1:29:58] } 3. d4 { [%clk 1:20:00] } 3... cxd4 { [%clk 1:29:58] } 4. Nxd4 { [%clk 1:20:00] } 4... Nf6 { [%clk 1:29:58] } 5. Nc3 { [%clk 1:20:00] } 5... a6 { [%clk 1:29:58] } 6. Be3 { [%clk 1:19:52] } 6... e5 { [%clk 1:29:58] } 7. Nf3 { [%clk 1:19:30] } 7... Be7 { [%clk 1:29:58] } 8. Nd2 { [%clk 1:18:59] } 8... b5 { [%clk 1:29:58] } 9. a4 { [%clk 1:18:50] } 9... b4 { [%clk 1:29:58] } 10. Nd5 { [%clk 1:18:50] } 10... Nxd5 { [%clk 1:29:58] } 11. exd5 { [%clk 1:18:50] } 11... O-O { [%clk 1:29:58] } 12. Nc4 { [%clk 1:18:31] } 12... Nd7 { [%clk 1:29:58] } 13. a5 { [%clk 1:18:29] } 13... f5 { [%clk 1:29:58] } 14. Bd2 { [%clk 1:18:08] } 14... Rb8 { [%clk 1:14:07] } 15. Ra4 { [%clk 1:18:08] } 15... b3 { [%clk 1:07:21] } 16. cxb3 { [%clk 1:17:13] } 16... f4 { [%clk 1:04:14] } 17. Be2 { [%clk 1:08:10] } 17... e4 { [%clk 1:01:14] } 18. O-O { [%clk 1:02:49] } 18... f3 { [%clk 0:31:32] } 19. gxf3 { [%clk 1:02:42] } 19... Nc5 { [%clk 0:31:16] } 20. Rb4?! { This ends up trading off a rook that would have been more active after: } { [%clk 0:46:20] } (20. Ra3! Bh3 21. b4 Bxf1 22. Qxf1 Nd3 23. Bxd3 exd3 24. f4 $13) 20... Rxb4 { [%clk 0:30:10] } 21. Bxb4 { [%clk 0:46:20] } 21... Bh3 { [%clk 0:29:51] } 22. Bxc5 { [%clk 0:40:41] } 22... Qe8 { [%clk 0:29:48] } 23. Kh1 { [%clk 0:39:06] } 23... exf3 { [%clk 0:21:47] } 24. Bxf3 { [%clk 0:34:55] } 24... Bxf1 { The critical moment hinges on remarkably complicated calculation: } { [%clk 0:21:27] } 25. Qxf1? { The problem is that now White cannot justifiably capture the d6-pawn, but they are materially lost if they don't try. } { [%clk 0:29:27] } (25. Nxd6! { was urgent, as the d-pawn was safe to capture. Black could try } 25... Qb8 26. Qxf1 Bxd6 (26... Rxf3 { allows } 27. Qe2! Qf8 28. b4 { when White has some more fortress-y tries: } 28... Bxd6 29. Qe6+ Qf7 30. Qxd6 h6 31. Qe6 $10) 27. Bxd6! Qxd6 28. Qd3 $44 { Queens make bad blockaders, so White has compensation. Note that, instead of 26. ... Bxd6, the intermezzo of }) (25. Bxd6?? { This wouldn't work, for reasons similar to the game variation with double attacks. } 25... Bxd6 26. Nxd6 Qe5 27. Nc4 Qf4 $19) 25... Rxf3 { [%clk 0:18:37] } 26. Nxd6 { [%clk 0:26:51] } 26... Bxd6 { [%clk 0:17:42] } 27. Bxd6 { [%clk 0:26:51] } 27... Qe4 { [%clk 0:17:31] } 28. Kg1 { No better was } { [%clk 0:26:51] } (28. Qg2 Qe1+ 29. Qg1 Qxa5 $19) 28... Rd3 { [%clk 0:16:52] } 29. f3 { [%clk 0:21:40] } 29... Qxd5 $19 { [%clk 0:16:32] } 30. Bg3 { [%clk 0:21:40] } 30... Qxb3 { [%clk 0:16:30] } 31. Qe2 { [%clk 0:20:27] } 31... Qd1+ { [%clk 0:16:30] } 32. Qxd1 { [%clk 0:20:27] } 32... Rxd1+ { [%clk 0:16:30] } 33. Kf2 { [%clk 0:20:27] } 33... Rd2+ { [%clk 0:16:30] } 34. Ke3 { [%clk 0:20:27] } 34... Rxb2 { [%clk 0:16:30] } 35. h3 { [%clk 0:20:27] } 35... Kf7 { [%clk 0:16:30] } 36. Be5 { [%clk 0:20:26] } 36... Rb5 { [%clk 0:16:30] } 37. Bc7 { [%clk 0:20:26] } 37... Ke6 { [%clk 0:16:30] } 38. Kd4 { [%clk 0:20:26] } 38... g6 { [%clk 0:16:28] } 39. f4 { [%clk 0:20:26] } 39... Kd7 { [%clk 0:16:28] } 40. Bb6 { [%clk 0:20:26] } 40... Rh5 { 0-1 Black wins. } { [%clk 0:16:28] } 0-1