[Event "Interzonal-09b"]
[Site "Petropolis"]
[Date "1973.08.04"]
[Round "9"]
[White "Hort, Vlastimil"]
[Black "Biyiasas, Peter"]
[Result "1-0"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. e3 Be7 6. b3 Nbd7 7. Bd3 O-O 8. O-O b6 9. Bb2 Bb7 10. Qe2 c5 11. Rfd1 cxd4 12. exd4 Re8 13. Rac1 a6 14. Ne5 Bd6 15. Rc2 Qe7 16. Bc1 Bc7 17. Bf4 dxc4 18. bxc4 Nxe5 19. Bxe5 Red8 20. f4 Rd7 21. Rb2 Rad8 22. h3 g6 23. Qf2 Bxe5 24. fxe5 Ne8 25. Be4 Bxe4 26. Nxe4 Rc7 27. Qe2 Rdc8 28. c5 bxc5 29. dxc5 Rd8 30. Rd6 f5 31. exf6 Nxf6 32. Nxf6+ Qxf6 33. Rxd8+ Qxd8 34. Qxe6+ Kg7 35. Qe5+ Kh6 36. Rb4 Qe7 37. Rh4+ Qxh4 38. Qxc7 Qc4 39. Qd6 Qxa2 40. c6 Qb1+ 41. Kh2 Qb3 1-0