[Event "Chigorin Memorial 25th"] [Site "St Petersburg"] [Date "2017.10.25"] [Round "5"] [White "Xu, Minghui"] [Black "Predke, Alexandr"] [Result "0-1"] [ECO "E43"] [WhiteElo "2318"] [BlackElo "2601"] [Annotator "thechesscorner,@gmail.com"] [PlyCount "56"] [EventDate "2017.10.21"] [EventType "swiss"] [EventRounds "9"] [EventCountry "RUS"] [SourceTitle "CBM 181 Extra"] [Source "ChessBase"] [SourceDate "2017.12.12"] [SourceVersion "1"] [SourceVersionDate "2017.12.12"] [SourceQuality "1"] 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 Bb4 5. e3 Bb7 6. Bd3 Ne4 7. Qc2 f5 $5 8. O-O Bxc3 9. bxc3 O-O 10. Nd2 Qh4 $5 11. f3 Nxd2 12. Bxd2 d6 {key position for the entire ..b6 variation} 13. a4 (13. Be1 Qg5 14. e4 (14. Kh1 Nd7 15. e4 fxe4 16. Bxe4 Bxe4 17. Qxe4 Rfe8 18. Qc6 Qd8 19. a4) 14... fxe4 15. Bxe4 Qe3+ 16. Bf2 Bxe4 17. fxe4 Qg5 18. Qa4 Qe7 19. Bg3 Rxf1+ 20. Rxf1 Qd7 21. Qd1 Nc6 { 0-1 (63) Maltsevskaya,A (2260)-Alekseev,E (2626) Khanty-Mansiysk 2020}) (13. Rae1 Nd7 14. e4 f4 15. Qa4 Qe7 16. g3 g5 17. h4 gxh4 18. gxf4 Kh8 19. Kf2 h3 20. Ke2 Rg8 {0-1 (31) Chatalbashev,B (2516)-Howell,D (2698) Leiden 2015}) (13. e4 fxe4 14. fxe4 Nd7) (13. g3 Qh5 14. e4 Nd7) (13. c5 dxc5 14. dxc5 Nd7 15. cxb6 axb6 16. Be1 Qg5) 13... a5 (13... Nc6 14. Be1 Qg5) 14. c5 (14. Be1) (14. e4) 14... bxc5 15. dxc5 Nd7 16. cxd6 cxd6 17. Bb5 (17. Rab1 Bc6 18. Bb5 Bxb5 19. Rxb5 Qc4 20. Rfb1 h6 21. Be1 Nc5) 17... Ne5 18. c4 Qg5 19. e4 Qh5 20. exf5 (20. c5 $5 fxe4 21. f4 Nd3 22. c6 Rac8 23. f5 Bxc6 24. Bxc6 Rxf5 25. Rxf5 Qxf5 26. Rf1 Qe5 27. Qc4 d5) 20... Rxf5 21. Ra3 Raf8 22. Qd1 $4 {now Black has a decisive attack} (22. c5 $1) 22... Bxf3 $1 23. Raxf3 Rxf3 24. gxf3 Nxf3+ 25. Rxf3 (25. Kg2 Qxh2#) 25... Rxf3 26. Qe1 Qg4+ 27. Kh1 Rf6 28. Bc6 d5 $1 { and ..Qf3+ followed by ..Rg6, or..Rg6 with checkmate threats.} 0-1