[Event "Interzonal-07"]
[Site "Sousse"]
[Date "1967.11.01"]
[Round "13"]
[White "Ivkov, Borislav"]
[Black "Kavalek, Lubomir"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 g6 3. g3 c6 4. Nf3 Bg7 5. Bg2 O-O 6. O-O d5 7. b3 a5 8. Nc3 Ne4 9. Bb2 Nxc3 10. Bxc3 Nd7 11. Rc1 e6 12. Qc2 b5 13. cxb5 cxb5 14. Bd2 b4 15. Bf4 Qb6 16. Bc7 Qb5 17. Qd2 Ba6 18. Rc2 Rfc8 19. Rfc1 Bf8 20. Qf4 h6 21. h4 Bg7 22. Bf1 a4 23. Rc6 axb3 24. axb3 Qb7 25. R6c2 Bb5 26. g4 Ra3 27. g5 h5 28. Ne5 Bxe5 29. Bxe5 Rc6 30. Rxc6 Bxc6 31. Qg3 Nxe5 32. dxe5 Ba4 33. Rb1 d4 34. Bg2 Bc6 35. Bxc6 Qxc6 36. Qf4 Qc3 37. Rc1 Ra1 38. Rxa1 Qxa1+ 39. Kh2 Qc3 40. Qf6 1/2-1/2