[Event "6th American Open"]
[Site "Santa Monica, CA USA"]
[Date "1970.11.??"]
[EventDate "?"]
[Round "?"]
[Result "1-0"]
[White "Robert Byrne"]
[Black "John Grefe"]
[ECO "B90"]
[WhiteElo "?"]
[BlackElo "?"]
[Source "Chess Life & Review, March 1971, p.122"]
[PlyCount "74"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6 8. Qd2
Be7 9. f3 O-O 10. O-O-O b5 11. g4 b4 12. Nd5 Bxd5 13. exd5 a5 14. Nc5 Nbd7 15.
Na4 Qb8 16. g5 Ne8 17. Bh3 Nc5 18. Nxc5 dxc5 19. c4 bxc3 20. Qxc3 Ra7 21. Rd2
Bd6 22. Rc2 Nc7 23. Bxc5 Bxc5 24. Qxc5 Na6 25. Qc4 Nb4 26. Rc3 Qd8 27. Rd1 Qxg5+
28. Kb1 Qg6+ 29. Ka1 Qh6 30. Bc8 Qd6 31. Qc5 Qxc5 32. Rxc5 Ra8 33. Bh3 f5 34. a3
Na6 35. Rxa5 Nc7 36. Rxa8 Nxa8 37. Re1 1-0