[Event "United States 1979"]  [White "Maark Diesen"]  [Black "Norman Weinstein"]  [Result "1-0"]  [Annotator "ATH"]  [ECO "E20"]  [WhiteFideId "-1"]  [BlackFideId "-1"]  [PlyCount "69"]  [GameId "2282571091189787"]  [EventDate "1979.??.??"]  [SourceTitle "StarBase 2.88"]  [Source "Pickard & Son"]  [SourceDate "2003.01.15"]  [SourceVersion "1"]  [SourceVersionDate "2003.01.15"]  [SourceQuality "2"]   1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. g3 c5 ({Stockfish prefers} 4... O-O {e.g.,} 5. Bg2 d5 6. Nf3 dxc4 7. a3 Bxc3+ 8. bxc3 c5 $11) 5. Nf3 Ne4 (5... d5 $1 6. Bg2 cxd4 7. Nxd4 O-O $11) 6. Qd3 (6. Bd2 $5 Bxc3 7. bxc3 b6 8. Bf4 Bb7 $11 {Bluebaum-Kurmann, Bad Wiessee 2013}) 6... Qa5 (6... cxd4 $1 7. Nxd4 $1 (7. Qxd4 Qf6 $1 $11) 7... Bxc3+ 8. bxc3 Nc5 $11) 7. Qxe4 Bxc3+ 8. Bd2 Bxd2+ 9. Nxd2 O-O (9... Nc6 $1 10. dxc5 b6 11. Bg2 Bb7 12. Qf4 bxc5 $6 {Gavrikov but Stockfish disagrees} 13. Qd6 Nd8 14. O-O Bxg2 15. Kxg2 Qb6 16. Qd3 Qb7+ $11) 10. dxc5 Na6 $6 (10... Qxc5 11. Bg2 Nc6 $11) 11. Bg2 Nxc5 (11... Rb8 $1 12. Qf4 Qxc5 13. O-O $14 {Lehmann-Krueger, Duiburg 2000}) 12. Qe3 (12. Qb1 $1 Na6 13. a3 $14 {Giffard-Kristiansen, EC Team ch., West Berlin, 1980}) 12... d5 $6 (12... d6 13. O-O $14 {Gonzalez Quevedo-Gofshtein, Seville 2001}) 13. O-O Bd7 $6 (13... Nd7 14. cxd5 exd5 15. Nb3 $16) 14. Rac1 (14. Rfc1 $1 $16) 14... Rac8 $6 (14... Na4 15. Nb3 $16) 15. cxd5 exd5 16. Bxd5 $18 Rfe8 17. Qf3 Be6 18. Bxe6 Nxe6 19. Rxc8 Rxc8 20. Qxb7 Rd8 21. Nf3 Qxa2 22. Rc1 $2 (22. Ne5 Rf8 23. Rd1 $18) 22... h6 23. Kg2 (23. Kf1 $16 {is a small improvement}) 23... Qa5 (23... Qd5 $142 24. Qxd5 Rxd5 25. Ne1 $16) 24. Rc8 Rxc8 25. Qxc8+ Kh7 $6 (25... Nf8 26. Qb7 $18 {puts up more resistance}) 26. Qd7 (26. Qb7 $1 $18 {is even stronger}) 26... Qc7 $2 (26... Kg8 27. Qe8+ Nf8 28. Ne5 Qd5+ 29. f3 $18 {would make White work a little harder for the win}) 27. Qxc7 Nxc7 28. Ne5 f6 (28... Kg8 {is an irrelevant improvement}) 29. Nc6 a6 30. Kf3 f5 $6 ({So is} 30... h5) 31. Kf4 Kg6 ({Likewise} 31... g6 {. One suspects that Black is in time trouble.}) 32. Ke5 Ne8 ({And} 32... Kg5) 33. Ne7+ Kf7 34. Nxf5 Nf6 35. f3 1-0