[Event "Interzonal-09b"]
[Site "Petropolis"]
[Date "1973.07.29"]
[Round "5"]
[White "Portisch, Lajos"]
[Black "Mecking, Henrique"]
[Result "1/2-1/2"]

1. c4 e5 2. Nc3 Nf6 3. g3 Bb4 4. Bg2 O-O 5. e4 Bxc3 6. bxc3 c6 7. Ba3 Re8 8. Qb3 b6 9. Rd1 Bb7 10. d3 d5 11. Ne2 dxe4 12. dxe4 Qc8 13. c5 Ba6 14. f3 Nbd7 15. Bh3 Qb7 16. Nc1 Rab8 17. cxb6 Nxb6 18. Bd6 Rbd8 19. Kf2 Bb5 20. Qc2 Rxd6 21. Rxd6 Nc4 22. Rd3 Qb6+ 23. Kg2 Ne3+ 24. Rxe3 Qxe3 25. Rd1 Qb6 26. Qf2 Qxf2+ 27. Kxf2 Kf8 28. Bf1 Bxf1 29. Kxf1 Ke7 30. Nd3 Nd7 31. Rb1 Ra8 32. Ke2 f6 33. Rb7 Kd8 34. f4 Kc8 35. Rb4 Kc7 36. Rb1 Re8 37. Kf3 f5 38. Nf2 fxe4+ 39. Nxe4 exf4 40. gxf4 Nb6 41. Rg1 Re7 42. h4 Nd5 43. c4 Nb6 44. c5 Nd5 45. f5 Kb7 46. Rb1+ Ka6 47. Rb8 Re5 48. Nd6 Nf6 49. Rb7 Rxc5 50. Rxg7 Rd5 51. Nc8 Rxf5+ 52. Kg2 Rf4 53. Rxa7+ Kb5 54. Rf7 h5 55. Na7+ Kc5 56. a4 Rg4+ 57. Kf3 Nd5 58. Rf5 Rxh4 59. a5 Rh3+ 60. Kg2 Ra3 61. Rxh5 Rxa5 62. Nxc6 Kxc6 1/2-1/2