[Event "Interzonal-09b"]
[Site "Petropolis"]
[Date "1973.07.25"]
[Round "2"]
[White "Mecking, Henrique"]
[Black "Panno, Oscar"]
[Result "1/2-1/2"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. Qe2 Nd6 7. Bxc6 bxc6 8. dxe5 Nb7 9. c4 O-O 10. Nc3 f6 11. Re1 fxe5 12. Nxe5 Bf6 13. Bf4 Qe8 14. Qc2 Bxe5 15. Bxe5 Qf7 16. c5 d6 17. cxd6 cxd6 18. Bg3 Bf5 19. Qa4 Qd7 20. Rad1 d5 21. f3 Nc5 22. Qa3 Ne6 23. Re5 Bg6 24. Qa4 Nc5 25. Qd4 Ne6 26. Qa4 Nc5 27. Qd4 Ne6 28. Qg4 Rae8 29. Rde1 Nc5 30. Qxd7 Nxd7 31. Re7 Rxe7 32. Rxe7 Rf7 33. Re8+ Rf8 34. Re6 Rf6 35. Rxf6 gxf6 36. Kf2 Bd3 37. Bd6 Kf7 38. Na4 Ke6 39. Bb4 Bb1 40. Nc5+ Nxc5 41. Bxc5 1/2-1/2