[Event "Interzonal-09b"]
[Site "Petropolis"]
[Date "1973.07.24"]
[Round "1"]
[White "Biyiasas, Peter"]
[Black "Kagan, Shimon"]
[Result "1-0"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. Re1 Nf6 6. e5 Nd5 7. Nc3 Nc7 8. Bxc6 dxc6 9. Ne4 Ne6 10. d3 h6 11. Be3 b6 12. Qd2 Bb7 13. a4 a5 14. h4 Qc7 15. Bf4 O-O-O 16. Bg3 Ba6 17. Rad1 Qd7 18. Qc1 Kb7 19. c3 Ka7 20. d4 c4 21. Qc2 Qd5 22. Ned2 c5 23. Nf1 cxd4 24. cxd4 Qa8 25. Ne3 Bb7 26. Qxc4 Rc8 27. Qb3 Bxf3 28. gxf3 Qxf3 29. d5 Nf4 30. Bxf4 Qxf4 31. Ng2 Qc4 32. Qf3 Rhf8 33. b3 Qc3 34. Rd3 Qb4 35. d6 e6 36. d7 Rb8 37. d8=Q Rfxd8 38. Rxd8 Rxd8 39. Qxf7+ Ka6 40. Qxg7 1-0