[Event "Windy City Invitational"]  [Site "Chicago 1985"]  [White "Raymond Keene"]  [Black "Eugene Martinovsky"]  [Result "1-0"]  [ECO "D91"]  [Annotator "ATH"]  [PlyCount "57"]  [EventDate "1985.03.??"]  [EventType "tourn"]  [EventRounds "12"]  [EventCountry "USA"]  [EventCategory "3"]  [SourceTitle "StarBase 4.56"]  [SourceDate "2004.11.04"]  [SourceVersion "1"]  [SourceVersionDate "2004.11.04"]  [SourceQuality "2"]   1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bg5 Ne4 6. cxd5 {The main line but  Stockfish prefers} (6. Bf4) (6. h4 $5) 6... Nxg5 7. Nxg5 e6 8. Qd2 exd5 9. Qe3+  Kf8 10. Qf4 (10. h4 $5) 10... Bf6 11. h4 h6 12. Nf3 c6 $6 (12... Be6 13. e3 Kg7  14. Bd3 c5 15. dxc5 Nd7 16. O-O Nxc5 $13 {Kuzmin-Holmsten, Kozalin 1999}) 13.  e4 dxe4 (13... Kg7 $5) 14. Nxe4 Bf5 $2 (14... Nd7 15. Bc4 Nb6 $11) 15. Nxf6  Qxf6 16. g4 Qe6+ $2 (16... Qe7+ 17. Ne5 Bc8 18. Bc4 $18 {may still be losing  but it's a lot better than the move played}) 17. Ne5 f6 $2 (17... Bxg4 18. Bc4  {is another improvement that sill loses}) 18. gxf5 $6 (18. Bc4 $1 $18 {is the  quick way}) 18... fxe5 19. dxe5 Qxf5 20. Qb4+ Kg7 21. O-O-O b5 22. Bd3 Qxe5 (  22... Na6 23. Qd6 Rhd8 24. Bxf5 Rxd6 25. Rxd6 gxf5 26. Rg1+ $18 {would prolong  the game pointlessly}) 23. Rhe1 ({According to Stockfish, the move played  leads to mate in 26 whereas} 23. Bxg6 $1 {leads to mate in 21}) 23... Na6 24.  Qg4 Qf6 25. Bxg6 Rhd8 26. Re6 ({missing the mate in 23 after} 26. Rd7+) 26...  Rxd1+ 27. Kxd1 Qxb2 (27... Qxe6 {only leads to getting mated in 19}) 28. Bc2+  Kf8 29. Qf5+ 1-0