[Event "Interzonal-09b"]
[Site "Petropolis"]
[Date "1973.08.03"]
[Round "8"]
[White "Ljubojevic, Ljubomir"]
[Black "Portisch, Lajos"]
[Result "1/2-1/2"]

1. e4 e6 2. d3 d5 3. Nd2 Nf6 4. Ngf3 Nc6 5. c3 a5 6. e5 Nd7 7. d4 b6 8. h4 Be7 9. Bb5 Ncb8 10. Nf1 Ba6 11. Bxa6 Rxa6 12. Qd3 h6 13. Ng3 Nf8 14. Nh5 g6 15. Nf4 Qd7 16. h5 g5 17. Ne2 c5 18. Nh2 c4 19. Qc2 Kd8 20. Ng4 Qe8 21. a4 Ra7 22. Rb1 Rc7 23. f4 Nbd7 24. f5 f6 25. fxe6 Nxe6 26. Ne3 fxe5 27. Nxd5 exd4 28. Nxc7 Nxc7 29. cxd4 Qf7 30. b3 Rf8 31. bxc4 Qf2+ 32. Kd1 Qxg2 33. Re1 Na6 34. Rb3 Nb4 35. Qg6 Rf6 36. Qg8+ Kc7 37. Re3 Bd6 38. Bd2 Bf4 39. Nxf4 Rxf4 40. R3e2 Qf3 1/2-1/2