[Event "Interzonal-09b"]
[Site "Petropolis"]
[Date "1973.08.11"]
[Round "13"]
[White "Keres, Paul"]
[Black "Ljubojevic, Ljubomir"]
[Result "1/2-1/2"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Nd7 4. d4 Nf6 5. Nc3 a6 6. Bxd7+ Nxd7 7. O-O e6 8. dxc5 Nxc5 9. Bg5 Qb6 10. Rb1 Bd7 11. b4 Na4 12. Nxa4 Bxa4 13. Qd3 h6 14. Be3 Qc7 15. c4 Be7 16. Rfc1 O-O 17. Nd4 Rfc8 18. h3 Be8 19. Ne2 Qd7 20. Rd1 Qa4 21. Rd2 Bf8 22. a3 a5 23. Nd4 Rc7 24. Rc2 Rac8 25. Rcc1 g6 26. Bd2 Kh7 27. h4 e5 28. Nb3 axb4 29. axb4 Qd7 30. Be3 Qe6 31. c5 dxc5 32. Bxc5 Bxc5 33. Rxc5 b6 34. Rxc7 Rxc7 35. Nd2 Qa2 36. Nf3 Bb5 37. Qd1 Rd7 38. Qe1 f6 39. Rd1 Rd3 40. Rxd3 Bxd3 41. Qe3 Qa6 1/2-1/2