[Event "Interzonal-04"]
[Site "Portoroz"]
[Date "1958.08.05"]
[Round "1"]
[White "Olafsson, Fridrik"]
[Black "Szabo, Laszlo"]
[Result "1-0"]

1. c4 c5 2. Nc3 e6 3. Nf3 d5 4. cxd5 exd5 5. d4 Nc6 6. g3 c4 7. Bg2 Bb4 8. O-O Nge7 9. e4 O-O 10. exd5 Nxd5 11. Ng5 Nf6 12. d5 Na5 13. Nge4 Nxe4 14. Nxe4 Bf5 15. Bg5 f6 16. Bd2 Bxd2 17. Qxd2 Qb6 18. Rfe1 Rfe8 19. d6 Kh8 20. Nc3 Red8 21. Nd5 Qc5 22. Qf4 Bg6 23. Nc7 Rac8 24. Rad1 Qb6 25. Bh3 Rb8 26. d7 Nc6 27. Ne6 Qxb2 28. Nxd8 Rxd8 29. Qc7 Qb6 30. Qxb6 axb6 31. Rb1 Ne5 32. Rxe5 fxe5 33. Rxb6 Be4 34. Re6 Bc6 35. Rxe5 Kg8 36. Rc5 Kf7 37. Rxc4 Ke7 38. f4 Ra8 39. Rd4 Kd8 40. Be6 Ra3 41. f5 Re3 42. Rg4 g6 1-0