[Event "Matsatlan 1988"]   [White "Viktor Gavrikov"]  [Black "Gyula Sax"]  [Result "1-0"]  [ECO "A31"]  [WhiteElo "2545"]  [BlackElo "2610"]  [Annotator "ATH"]  [PlyCount "43"]  [EventDate "1988.??.??"]  [SourceTitle "StarBase 4.56"]  [SourceDate "2004.11.04"]  [SourceVersion "1"]  [SourceVersionDate "2004.11.04"]  [SourceQuality "2"]   1. Nf3 Nf6 2. c4 c5 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 Qb6 6. Nb3 e6 7. g3 Ne5 8. e4  Bb4 9. Qe2 d6 10. f4 Nc6 11. Be3 Bxc3+ 12. bxc3 Qc7 13. Bg2 O-O ({The  alternative here (preferred by Stockfish) is} 13... e5 14. c5 dxc5 15. Bxc5 Bg4  16. Qe3 (16. Qd2) 16... b6 (16... Nd7 $1) 17. Ba3 O-O-O $11 {Smejkal-Gdanski,  Polanicza Zdroj 1991}) 14. c5 dxc5 15. Bxc5 Na5 $2 (15... Rd8 16. e5 Na5 17.  exf6 Nxb3 18. axb3 Qxc5 19. Qe5 $1 Qb6 $11 {Uhlmann-Van der Wiel, Baden-Baden  1992}) 16. Bxf8 $6 $146 (16. Bd4 $1 Nc6 (16... b6 $1 $14) 17. e5 Nd5 {  Tukmakov-Langeweg, Biel 1995} 18. Bc5 $16) 16... Nxb3 17. axb3 (17. Rd1 $1  Qxc3+ 18. Kf1 Kxf8 19. axb3 Qxb3 20. e5 Bd7 $1 21. Rd3 Qb1+ 22. Qd1 Qxd1+ 23.  Rxd1 Nd5 24. Bxd5 exd5 25. Kf2 $11) 17... Qxc3+ 18. Kf2 Qd4+ $2 (18... Ng4+ $1  19. Qxg4 Qd4+ 20. Ke2 Qb2+ 21. Ke3 Qc3+ $11 (21... Qxb3+ $4 {throws away the  perpetual by allowing the black queen to interpose, e.g.,} 22. Kf2 Qb6+ 23. Kf1  Qb5+ 24. Qe2)) 19. Kf3 e5 20. h3 (20. f5 $4 Bxf5 $1 21. exf5 $2 e4+ {and White  gets mated}) 20... h5 21. Qc2 $1 Ng4 $4 (21... Kxf8 $16 22. Rhd1 Qb6 23. Qd3  Bf5 $1 24. Ke2 Be6 25. fxe5 $16) 22. Bc5 1-0