[Event "Toronto 1984"]  [White "Michael Wilder"]  [Black "Igor Ivanov"]  [Result "0-1"]  [ECO "E12"]  [WhiteElo "2535"]  [BlackElo "2580"]  [Annotator "ATH"]  [PlyCount "80"]  [EventDate "1984.07.??"]  [EventType "swiss"]  [EventRounds "10"]  [EventCountry "CAN"]  [SourceTitle "Inf 03"]   1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 c5 5. d5 exd5 6. cxd5 d6 7. Nc3 (7. e4 a6 8.  Bd3 g6 (8... Nbd7 9. a4 $16 {De Firmian-Wilder, USA 1988}) 9. O-O $14) 7... Be7  (7... Ba6 $1 8. e4 $14) 8. g3 ({Somewhat better is} 8. e4 O-O 9. Bd3 $14) 8...  O-O (8... Nbd7 $5) 9. Bg2 Re8 (9... Nbd7 10. O-O $14 {is slightly better}) 10.  O-O Bg4 (10... Nbd7 11. a4 $14) 11. Qc2 (11. Nd2 $1 $14) 11... Bf8 (11... Na6  12. e4 $14) 12. Nh4 (12. e4 $1 $14) 12... Na6 (12... b5 $1 $11) 13. e4 (13. Bg5  $14) 13... c4 (13... Bd7 $1 $11) 14. Nb5 (14. f4 b5 15. Be3 (15. Nxb5 $2 Qb6+  $19) 15... b4 16. axb4 Nxb4 17. Qd2 a5 $11) 14... Bd7 15. Nd4 $6 (15. a4 g6 16.  Be3 Ng4 17. Bd4 $14) 15... Rc8 (15... Nc5 $11) 16. Nc6 Bxc6 (16... Qc7 $5) 17.  dxc6 Nc5 18. Qxc4 Ncxe4 19. Be3 $2 (19. Bh3 d5 20. Qc2 Rc7 21. Nf5 $16) 19...  d5 20. Qa4 Bc5 21. Nf5 (21. Bh3 Rc7 22. Nf5 g6 23. Nd4 Bxd4 24. Qxd4 (24. Bxd4  $6 Nd2 $15) 24... Rxc6 $11) 21... g6 (21... Qc7 $5 $11) 22. b4 $6 (22. Nd4 Ng4  $15) 22... Nc3 $2 (22... Bxe3 23. Nxe3 d4 $17) 23. Qxa7 $2 (23. Qc2 gxf5 24.  bxc5 $14) 23... Bxe3 24. Nxe3 Rxc6 25. Qa6 Rc8 26. Qd3 $6 (26. Nd1 Ne2+ 27. Kh1  d4 $17) 26... d4 27. Nd1 ({Marginally better is} 27. Nc4 b5 $19) 27... Ne2+ 28.  Kh1 Nc1 29. Qf3 $6 (29. Qb5 {puts up more resistance}) 29... Ne4 30. Qf4 Ne2  31. Qh6 ({According to Stockfish, dumping the queen with} 31. Qxe4 {is best})  31... Rc2 (31... d3 {is the quick method}) 32. a4 $2 (32. Bxe4 Rxe4 33. Qh3 Qd5  $19 {is a lot better (not that it matters)}) 32... Nd2 33. a5 $6 (33. Qh4)  33... bxa5 (33... Nxf1 {is better}) 34. bxa5 $6 (34. Qh3) 34... Nxf1 35. a6  Nfxg3+ 36. hxg3 Nxg3+ 37. Kh2 (37. fxg3 Re1+ 38. Kh2 Qa8 39. Qh3 Ree2 $19)  37... Nh5 38. Bh3 (38. Qxh5 {delays the inevitable checkmate}) 38... Qc7+ 39.  Kg1 Re1+ 40. Bf1 Rxf2 $1 0-1