[Event "Interzonal-09b"]
[Site "Petropolis"]
[Date "1973.07.28"]
[Round "4"]
[White "Kagan, Shimon"]
[Black "Panno, Oscar"]
[Result "0-1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g3 Nc6 7. Bg2 Bd7 8. O-O a6 9. a4 Rc8 10. Nde2 Be7 11. h3 O-O 12. Be3 Nb4 13. a5 Qc7 14. Bb6 Qb8 15. f4 Bd8 16. Bxd8 Rfxd8 17. f5 exf5 18. exf5 Bc6 19. Rf4 Qa7+ 20. Kh2 Qc5 21. Bxc6 bxc6 22. Nd4 Nbd5 23. Nxd5 Qxd5 24. Nb3 Qb5 25. Qf1 Qb7 26. Rd1 c5 27. g4 d5 28. g5 Nh5 29. Rf3 Re8 30. Qf2 Re4 31. Kg1 Qc6 32. Nd2 Re5 33. Re1 Rxe1+ 34. Qxe1 g6 35. f6 h6 36. gxh6 Kh7 37. Qe7 Rc7 38. Qe5 c4 39. Nf1 Qc5+ 40. Ne3 d4 41. Ng4 Qa7 42. Nf2 d3 43. cxd3 cxd3 44. Rxd3 Rc1+ 45. Kg2 Rc2 46. Rf3 Qb7 47. b3 Qc6 48. h4 Ra2 49. b4 Qc4 50. Kg1 Re2 51. Qa1 Qxb4 52. Qc3 Qxh4 53. Kf1 Rxf2+ 54. Rxf2 Ng3+ 55. Kg2 Ne4 56. Qf3 0-1