[Event "Northwest Chess May op"]
[Site "Seattle"]
[Date "1983.05.??"]
[Round "?"]
[White "Grefe, John Alan"]
[Black "McMahan, Brendan"]
[Result "1-0"]
[ECO "A42"]
[WhiteElo "2420"]
[PlyCount "75"]
[EventDate "1983.05.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. e4 g6 2. d4 d6 3. c4 Bg7 4. Nc3 Nc6 5. Be3 e5 6. d5 Nce7 7. c5 Nf6 8. Be2 0-0 9. cxd6 cxd6 10. g4 Qa5 11. f3 Ne8 12. Qd2 f5 13. gxf5 gxf5 14. 0-0-0 fxe4 15. fxe4 Ng6 16. h4 Nf4 17. h5 Bh6 18. Nf3 Bd7 19. Rdg1+ Kh8 20. Ng5 Qd8 21. Ne6 Bxe6 22. dxe6 Bg5 23. Bc4 Rc8 24. Bb3 h6 25. Kb1 Ng7 26. Bxf4 exf4 27. Qd3 Rc5 28. Rd1 Qa5 29. Rhg1 Re5 30. Rxg5 Rxg5 31. Qxd6 Qc5 32. e7 Qxd6 33. Rxd6 Rg1+ 34. Kc2 Rg2+ 35. Kd1 Rg1+ 36. Kd2 Rg2+ 37. Ke1 Rg1+ 38. Kf2 1-0

