[Event "Detroit East op"]
[Site "Detroit East"]
[Date "1984.??.??"]
[Round "?"]
[White "Mason, David"]
[Black "Blocker, Calvin"]
[Result "0-1"]
[BlackElo "2390"]

1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Nbd7 5. Nf3 dxc4 6. O-O c5 7. Na3 Nb6 8. Nxc4 Nxc4 9. Qa4+ Bd7 10. Qxc4 b5 11. Qc2 Rc8 12. Bg5 h6 13. Bxf6 gxf6 14. Qd2 Bc6 15. dxc5 Bxc5 16. Qxd8+ Kxd8 17. Rfd1+ Ke7 18. Nd4 Bd7 19. Nb3 Bb6 20. Rac1 a5 21. e3 Rhd8 22. Rxc8 Rxc8 23. Rc1 Rxc1+ 24. Nxc1 Kd6 25. Kf1 e5 26. Ke2 f5 27. f3 Be6 28. b3 Bc5 29. Nd3 Bb6 30. Nc1 a4 31. Kd3 Bc5 32. e4 fxe4+ 33. fxe4 Ba3 34. Ne2 axb3 35. axb3 Bxb3 36. Nc3 Bc4+ 37. Kc2 b4 38. Nb1 Kc5 39. Nxa3 bxa3 40. Kc3 a2 41. Kb2 Kd4 42. h4 Ke3 43. g4 f6 0-1