[Event "Interzonal-09b"]
[Site "Petropolis"]
[Date "1973.08.08"]
[Round "12"]
[White "Biyiasas, Peter"]
[Black "Gheorghiu, Florin"]
[Result "0-1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nf6 6. O-O Qc7 7. Nd2 Be7 8. Qe2 d6 9. c3 Nbd7 10. f4 g6 11. N2f3 e5 12. fxe5 dxe5 13. Nb3 h6 14. Kh1 b6 15. Be3 Bb7 16. Bg1 O-O 17. Bc2 Kg7 18. Rad1 Rad8 19. Rd2 Nc5 20. Nxc5 Bxc5 21. Rfd1 Rxd2 22. Rxd2 Bxg1 23. Kxg1 Re8 24. h3 Qc5+ 25. Kh2 Qc6 26. a4 Re7 27. Kg1 b5 28. a5 Nxe4 29. Bxe4 Qxe4 30. Qxe4 Bxe4 31. Rd6 Bb7 32. Rb6 e4 33. Ne5 e3 34. Nd3 Rd7 35. Ne1 Be4 36. Kf1 Rd2 37. b4 Bd5 38. Nf3 Bc4+ 39. Kg1 Rd1+ 0-1