[Event "Interzonal-07"]
[Site "Sousse"]
[Date "1967.10.31"]
[Round "12"]
[White "Portisch, Lajos"]
[Black "Bilek, Istvan"]
[Result "1/2-1/2"]

1. d4 d6 2. c4 g6 3. Nc3 Bg7 4. e4 f5 5. exf5 Bxf5 6. Bd3 Bxd4 7. Bxf5 Bxc3+ 8. bxc3 gxf5 9. Qh5+ Kd7 10. Qxf5+ e6 11. Qd3 Qf6 12. Nf3 Nc6 13. c5 Qg6 14. Qd1 Qe4+ 15. Be3 Nge7 16. cxd6 cxd6 17. Qb3 Na5 18. Qb5+ Nec6 19. O-O-O a6 20. Qc5 d5 21. Ng5 Qc4 1/2-1/2