[Event "USA-ch"]
[Site "New York"]
[Date "1972.??.??"]
[Round "4"]
[White "Martz, William E"]
[Black "De Fotis, Gregory"]
[Result "1/2-1/2"]

1. c4 f5 2. b3 e5 3. Bb2 Nc6 4. e3 Nf6 5. Nf3 d6 6. d4 e4 7. d5 Nb8 8. Nd4 c5 9. dxc6 bxc6 10. Be2 a5 11. Nc3 g6 12. Qd2 Bg7 13. O-O O-O 14. f4 Qc7 15. Rfd1 Na6 16. Na4 Nc5 17. Nxc5 dxc5 18. Nc2 1/2-1/2