[Event "1983 Canadian Open"]  [Site "Toronto"]  [White "Leonid Shamkovich"]  [Black "Lawrence Day"]  [Result "1-0"]  [ECO "C91"]  [WhiteElo "2480"]  [BlackElo "2448"]  [Annotator "ATH"]  [PlyCount "75"]  [EventDate "1983.07.??"]  [EventType "swiss"]  [EventRounds "10"]  [EventCountry "CAN"]  [SourceTitle "CFC 1983.09"]   1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3  O-O 9. d4 (9. h3 {is the main line}) 9... Bg4 10. d5 (10. Be3 $5) 10... Na5 11.  Bc2 c5 $6 (11... Qc8 $11) 12. Nbd2 (12. h3 $5 Bd7 13. b3 $14) 12... Ne8 $2 (  12... Bd7 $11) 13. h3 (13. Nf1 $1) 13... Bd7 14. Nf1 Nb7 $2 (14... Nc4 15. b3  $14 {Tseshkovsky-Ivkov, Moscow 1999}) 15. b3 a5 (15... Qc7 16. c4 $14) 16. a4  b4 17. Bd2 g6 (17... Nc7 18. Ne3 $14) 18. g4 $6 (18. Bh6 Ng7 19. Ne3 $14) 18...  Ng7 (18... h5 $1 19. gxh5 bxc3 20. Bh6 Ng7 21. Ng3 Bxh3 $11) 19. Ng3 (19. Ne3  f5 20. exf5 gxf5 $11) 19... h5 20. gxh5 Bxh3 (20... bxc3 $5) 21. Nh2 $2 (21. h6  Ne8 $11) 21... bxc3 (21... Bg5 $5 $15) 22. Bxc3 (22. Be3 $5) 22... Bg5 (22...  Rc8 $1 $15) 23. Qf3 Qc8 $2 (23... Rc8 $1 $15) 24. Kh1 $1 Kh7 (24... Bf4 $5 25.  Rg1 $14) 25. Rg1 (25. Bb2 $1 c4 26. bxc4 Qxc4 27. Bc1 Bh4 28. Bd1 Nc5 29. Be2  $16) 25... Kh6 $2 (25... Bf4 26. Ne2 Nxh5 27. Ng4 Ng3+ 28. Rxg3 Bxg3 29. Nf6+  Kg7 30. Nxg3 $16) 26. Nf5+ $1 Bxf5 27. exf5 Nxf5 (27... Nxh5 28. Rxg5 $1 Nf4 (  28... Kxg5 29. fxg6 Nf4 30. Rg1+ $18) 29. Rg4 $18) 28. Ng4+ $6 (28. Rxg5 $1 $18  {would end the game quickly}) 28... Kh7 $2 (28... Kg7 29. Nxe5 $1 dxe5 30. Rxg5  $18 {is better but not by nearly enough to save the game}) 29. Nxe5 dxe5 30.  Rxg5 Nbd6 31. Bxe5 f6 32. Rxg6 fxe5 33. Rxd6 Kh8 34. Re6 Ng7 35. Rh6+ Kg8 36.  Bh7+ Kh8 37. Qe3 Qd8 38. Bg6+ 1-0