[Event "Interzonal-09b"]
[Site "Petropolis"]
[Date "1973.08.17"]
[Round "17"]
[White "Savon, Vladimir A"]
[Black "Biyiasas, Peter"]
[Result "1-0"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 c6 7. Bd3 a6 8. Nge2 b5 9. O-O Nbd7 10. Qc2 Bb7 11. Rfd1 e5 12. Bf2 Re8 13. d5 bxc4 14. Bxc4 c5 15. Na4 Qc7 16. b3 Reb8 17. Nb2 Bc8 18. Bd3 Ne8 19. Be3 Nb6 20. Nc3 Bd7 21. Qe2 Qb7 22. Rab1 Nc7 23. a4 f5 24. Nc4 Nxc4 25. Bxc4 f4 26. Bd2 Qb6 27. Kh1 a5 28. Rbc1 Bc8 29. g3 fxg3 30. hxg3 Ba6 31. Rb1 Rf8 32. Kg2 Rf7 33. Rf1 Bc8 34. Nd1 Na6 35. Nb2 Nb4 36. Bb5 Qd8 37. Nc4 Raa7 38. Be3 Bf8 39. Rh1 Bd7 40. Bxd7 Rfxd7 41. Bd2 Rf7 42. Be3 Ra8 43. Rbd1 Qe7 44. Rd2 Bg7 45. Qd1 Qc7 46. Rf2 Re8 47. Qg1 Bf6 48. Qh2 Bd8 49. Qh3 Qe7 50. Rd1 Qf8 51. Bh6 Qe7 52. Qg4 Bc7 53. Bg5 Qf8 54. Qh4 Rb8 55. Bh6 Qe8 56. Qg4 Qe7 57. Qe6 Re8 58. Qxe7 Rexe7 59. Re2 Re8 60. Rdd2 Rd7 61. f4 exf4 62. gxf4 Bd8 63. Kf3 Kf7 64. e5 dxe5 65. Nxe5+ Rxe5 66. fxe5 Rxd5 67. Ke4 Ke6 68. Rxd5 Nxd5 69. Rd2 Nc3+ 70. Kd3 Nb1 71. Rd1 1-0