[Event "Costa del Sol-12"]
[Site "Malaga"]
[Date "1972.02.06"]
[Round "4"]
[White "Martz, William E"]
[Black "Bellon Lopez, Juan Manuel"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 c6 6. Nf3 O-O 7. Rc1 Be6 8. Qb3 Qb6 9. Qxb6 axb6 10. Ng5 Nh5 11. Bc7 Rc8 12. Bxb8 Rcxb8 13. Nxe6 fxe6 14. Be2 Nf6 15. a3 c5 16. O-O Rc8 17. dxc5 bxc5 18. Bf3 Rd8 19. Rcd1 Ne4 20. Bxe4 Bxc3 21. cxd5 Bxb2 22. dxe6 Rxd1 23. Rxd1 c4 24. Bxb7 Rxa3 25. Rd8+ Kg7 26. Kf1 Ra7 27. Be4 Be5 28. Ke2 Kf6 29. f4 Bc7 30. Rd4 Ra2+ 31. Kf3 Bb6 32. Rxc4 Ra3 33. g4 Bxe3 34. g5+ Kxe6 1/2-1/2