[Event "National Open 1985"]  [Site "Las Vegas"]  [White "John Donaldson"]  [Black "Viktors Pupols"]  [Result "0-1"]  [ECO "D30"]  [Annotator "ATH"]  [PlyCount "70"]  [EventDate "1985.03.??"]  [EventType "swiss"]  [EventRounds "6"]  [EventCountry "USA"]  [SourceTitle "StarBase 4.56"]  [SourceDate "2004.11.04"]  [SourceVersion "1"]  [SourceVersionDate "2004.11.04"]  [SourceQuality "2"]   1. d4 d5 2. Nf3 c6 3. c4 e6 4. Bf4 (4. e3 Nf6 5. Nbd2 c5 $1 6. cxd5 exd5 7. b3  Bd6 8. dxc5 Bxc5 9. Bb2 O-O 10. Rc1 Bd6 $11) 4... dxc4 5. e3 b5 6. a4 $6 (6.  Be2 Be7 $11) 6... Nd7 (6... Bb4+ $1 7. Nc3 Nf6 $15) 7. Be2 Bb4+ 8. Kf1 $6 (8.  Nc3 Ngf6 $15) 8... Ngf6 (8... Bb7 $5 $17) 9. b3 c3 $6 (9... O-O 10. axb5 cxb5  11. bxc4 bxc4 12. Bxc4 Bb7 $17) 10. axb5 cxb5 11. Bxb5 Bb7 12. Na3 (12. Qc2 Rc8  $17 {puts up slightly more resistance}) 12... O-O (12... Qb6 $1 $17) 13. Nc2  Be7 (13... Qb6 $17) 14. Ke2 (14. Qe2 a5 $17 {is a small improvement for White})  14... Ne4 (14... Qb6 $1 $19) 15. Bg3 (15. Bd3 a5 $19) 15... h5 $6 (15... a5 $19  ) 16. Ne5 $2 (16. Ba6 Bxa6+ 17. Rxa6 h4 18. Be5 Qc8 $19 {puts up more  resistance}) 16... Nxe5 17. Bxe5 Nd2 18. f3 Nxb3 (18... h4 $19 {is the quick  method}) 19. Ra4 Na5 $2 (19... Nd2 $19) 20. Qa1 Nc6 21. Bg3 $2 (21. Qxc3 Rc8  $17) 21... a5 (21... h4 $1 {is a lot stronger}) 22. Qxc3 Nb4 (22... Qb6 $1) 23.  Nxb4 axb4 24. Rxa8 Qxa8 25. Qa1 Bc6 $2 (25... h4 26. Qxa8 Rxa8 27. Be1 Ra1 $19)  26. Bd3 $2 (26. Bc4 Bd5 27. Bd3 Qb7 $17) 26... Qb7 27. Qb2 (27. Qb1 Ra8 $19)  27... h4 28. Be1 $6 (28. Bf4 h3 $19) 28... Ra8 (28... h3 $1 $19 {is even  stronger}) 29. Bd2 $2 (29. Kf2 h3 $19 {is an irrelevant improvement.}) 29... h3  30. e4 $2 (30. Rb1 {is also irrelevantly better}) 30... hxg2 31. Ra1 $6 (31.  Rd1) 31... Rxa1 32. Qxa1 Bb5 33. Be3 $2 ({and Stockfish says White is only  down 20.4 pawn equivalences vs. 51.89 with the move played} 33. Kf2) 33...  Bxd3+ 34. Kxd3 Qb5+ 35. Kd2 b3 0-1