[Event "Denver Open"]
[Site "Denver, CO USA"]
[Date "1972.07.02"]
[EventDate "?"]
[Round "4"]
[Result "1-0"]
[White "John L Watson"]
[Black "Curtis Carlson"]
[ECO "B90"]
[WhiteElo "2133"]
[BlackElo "1832"]
[PlyCount "49"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6
7. Bb3 Be7 8. f4 Nc6 9. Be3 Qc7 10. Qf3 Nxd4 11. Bxd4 b5
12. e5 Bb7 13. Qg3 dxe5 14. fxe5 Nh5 15. Qg4 g6 16. Rf1 Rf8
17. O-O-O Ng7 18. a4 b4 19. a5 bxc3 20. Bb6 Qc8 21. Ba4+ Bc6
22. Qe4 Bg5+ 23. Kb1 Bxa4 24. Qxa4+ Ke7 25. Bc5+ 1-0