[Event "Chennai Women's Chess Olympiad"] [Site "chess24.com"] [Date "2022.08.02"] [Round "5.2"] [White "Chumpitaz, Ann"] [Black "Krush, Irina"] [Result "1-0"] [WhiteElo "2278"] [WhiteTeam "Peru"] [BlackElo "2430"] [BlackTeam "United States"] [Annotator "John Watson"] [Variant "Standard"] [ECO "B56"] [Opening "Sicilian Defense: Kupreichik Variation"] [Source "https://lichess.org/study/cS8lSqW7/otnwigbr"] [Orientation "white"] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bd7 6. Bg5 e6 7. Qd3 a6 8. f4 Nc6 9. O-O-O b5 (9... h6 { and }) (9... Be7 { are typical options. }) 10. e5!? { Possibly preparation, although it's hard for Black to go wrong. } (10. Kb1) (10. Be2 { and }) (10. Nf3 { are normal moves here. }) 10... dxe5 11. Nxc6? (11. fxe5 Nxe5 12. Qg3 { gives more compensation. Then } 12... Ng6 13. Qf3 { gives Black a choice between repetition by 13...Ng6-e5 or the risky } 13... Qb8 14. Bxf6 gxf6 15. Ne4!) 11... Bxc6 12. Qg3 Qa5?! (12... Qc7! { gives a nice advantage after } 13. fxe5 Nh5 (13... Nd7 { is also fine }) 14. Qg4 Qxe5! 15. Be2 (15. Qxh5 h6) 15... Nf6 { with an extra pawn. }) 13. fxe5 (13. f5!?) 13... b4?? { A bad day at the office. Irina should have played } (13... Nd7 { , which the engines assess as equal after, for example, } 14. Be2 h6 15. Bf3 Qc7 16. Bxc6 Qxc6 17. Be3) 14. exf6 bxc3 15. Bc4! { [#] Suddenly Black's king is trapped in the center and she is completely lost. } 15... Rg8?! { This fails, but the problem is that Rh1-e1 and Bc4xe6 is threatened, while } (15... h6 16. fxg7 Bxg7 17. Bf4 Kf8 { is terribly passive. }) 16. Bf4 { Other moves are strong as well, e.g., } (16. Rhe1 Ba3!? (16... gxf6 17. Bxe6 Qxg5+ 18. Qxg5 fxg5 19. Bd7+ Kd8 20. Bxc6+) 17. Bxe6! fxe6 18. Rxe6+ Kf7 19. Rxc6 $18) 16... Ba3!? (16... Rc8 17. Bb3 Ba4 18. Bc7! Qb5 (18... Rxc7 19. Bxa4+ Qxa4 20. Qxc7) 19. Rd4! Bxb3 20. axb3 gxf6 (20... Qf5 21. Rhd1) 21. Qxg8 Rxc7 22. Kb1 cxb2 23. Rhd1 $18) 17. Bc7! Bxb2+ 18. Kb1 Qb4 (18... Qa3 19. Qd3 gxf6 20. Qxh7 Rf8 21. Bxe6! fxe6 22. Bd6) 19. Bb3 a5 20. Rd6 a4 21. Rhd1 gxf6 22. Qxg8+ Ke7 23. Rxe6+ fxe6 24. Qxe6+ { 1-0 White wins. } 1-0