[Event "Interzonal-09b"]
[Site "Petropolis"]
[Date "1973.08.03"]
[Round "8"]
[White "Panno, Oscar"]
[Black "Hort, Vlastimil"]
[Result "1/2-1/2"]

1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 Nb6 5. Bg2 g6 6. d3 Bg7 7. Be3 O-O 8. Rc1 h6 9. Qd2 Kh7 10. f4 f5 11. h4 N8d7 12. h5 gxh5 13. Rxh5 Nf6 14. Rh3 c6 15. Nf3 Ng4 16. Bc5 Re8 17. Rh4 Kg8 18. Bh3 Nd7 19. Bg1 Ndf6 20. Ne5 h5 21. Bxg4 hxg4 22. e4 Nd7 23. Nc4 Nb6 24. Ne3 e6 25. e5 Kf7 26. Nc4 Nxc4 27. dxc4 Qxd2+ 28. Kxd2 b6 29. c5 Rd8+ 30. Kc2 b5 31. b4 a5 32. a3 Ra7 33. Be3 a4 34. Rd1 Rxd1 35. Nxd1 Rd7 36. Bg1 Rd8 37. Rh2 Bf8 38. Nc3 Kg7 39. Ne2 Rd5 40. Nd4 Bd7 41. Kc3 Be7 42. Rh5 Bd8 43. Be3 Be7 44. Kc2 Bd8 45. Ne2 Be8 1/2-1/2