[Event "Interzonal-09b"]
[Site "Petropolis"]
[Date "1973.08.03"]
[Round "8"]
[White "Biyiasas, Peter"]
[Black "Smyslov, Vassily V"]
[Result "1/2-1/2"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Bc5 6. Nb3 Bb6 7. Bf4 d6 8. O-O Nc6 9. c4 e5 10. Bd2 Qh4 11. Nc3 Nf6 12. Qf3 Bg4 13. Qg3 Qxg3 14. hxg3 Rc8 15. Nd5 Nxd5 16. cxd5 Nd4 17. Nxd4 Bxd4 18. Rac1 Ke7 19. Rfe1 Bd7 20. b3 Bb2 21. Rxc8 Rxc8 22. Kf1 h5 23. Rb1 Bd4 24. Rc1 Rc5 25. Ke2 g6 26. Rc2 f5 27. f3 Kf6 28. Bb4 Rxc2+ 29. Bxc2 Bc5 30. Bd2 Bg1 31. Bd3 Bh2 32. Kf2 f4 33. gxf4 Bxf4 34. Bb4 Ke7 35. Ke2 g5 36. Ba5 Bc1 37. Bb4 Bc8 38. Ba5 Ba3 39. Bd2 Kf6 40. Ba5 g4 41. Bd8+ Kf7 42. Kf2 Bc5+ 43. Kg3 gxf3 44. gxf3 Bd7 45. Bf1 Bb4 46. a4 Be1+ 47. Kh2 1/2-1/2