[Event "Interzonal-05"]
[Site "Stockholm"]
[Date "1962.02.13"]
[Round "11"]
[White "Portisch, Lajos"]
[Black "Olafsson, Fridrik"]
[Result "1/2-1/2"]

1. c4 Nf6 2. Nc3 e6 3. d4 Bb4 4. e3 O-O 5. Nf3 d5 6. a3 Bxc3+ 7. bxc3 c5 8. Bb2 Qa5 9. Nd2 cxd4 10. cxd4 b6 11. Bd3 dxc4 12. Bxc4 Ba6 13. O-O Bxc4 14. Nxc4 Qd5 15. Rc1 Nc6 16. f3 Rfd8 17. Rf2 Rac8 18. Rfc2 Ne7 19. Qe1 h6 20. e4 Qb7 21. d5 Ne8 22. d6 Ng6 23. Kh1 Nf6 24. e5 Nd5 25. Qe4 Qa6 26. g3 Nf8 27. f4 Nd7 28. f5 Nc5 29. Qf3 b5 30. Nd2 Nd7 31. Nb3 b4 32. axb4 Rxc2 33. Rxc2 Nxb4 34. Rd2 Qc6 35. Qxc6 Nxc6 36. fxe6 fxe6 37. Nd4 Ncxe5 38. Nxe6 Re8 39. Nc7 Nc4 40. Nxe8 Nxd2 41. Bxg7 h5 42. Bc3 Nc4 43. Ng7 h4 44. Nf5 hxg3 45. h4 Kh7 46. h5 Nxd6 1/2-1/2