[Event "Interzonal-07"]
[Site "Sousse"]
[Date "1967.10.19"]
[Round "4"]
[White "Portisch, Lajos"]
[Black "Larsen, Bent"]
[Result "1-0"]

1. Nf3 d6 2. d4 Bg4 3. c4 g6 4. Qb3 Qc8 5. h3 Bxf3 6. Qxf3 Bg7 7. e3 Nf6 8. Nc3 O-O 9. g3 Nbd7 10. Bg2 c6 11. O-O e5 12. d5 cxd5 13. cxd5 Ne8 14. e4 f5 15. h4 Qc4 16. h5 fxe4 17. Qd1 gxh5 18. Qxh5 Nef6 19. Qh4 Nc5 20. Be3 Rac8 21. Rfd1 Kh8 22. Bh3 Rc7 23. Bf5 b5 24. Rac1 Nd3 25. Ne2 Nxc1 26. Rxc1 Qxe2 27. Rxc7 Rg8 28. Rxg7 Qd1+ 29. Kh2 Kxg7 30. Qg5+ Kf7 31. Be6+ Ke8 32. Qxf6 Qh5+ 33. Bh3 Qg6 34. Qxg6+ hxg6 35. Bxa7 Ke7 36. a3 Rh8 37. Be3 Kf6 38. Kg2 Rh7 39. Bc8 Rc7 40. Ba6 Rc2 41. b4 Rc3 42. Bxb5 Rxa3 43. Bc6 1-0