[Event "Interzonal-04"]
[Site "Portoroz"]
[Date "1958.09.07"]
[Round "20"]
[White "Olafsson, Fridrik"]
[Black "Sherwin, James T"]
[Result "0-1"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. d4 c5 5. cxd5 Nxd5 6. e3 Nc6 7. Bd3 Be7 8. O-O O-O 9. a3 cxd4 10. exd4 Nf6 11. Bc2 a6 12. Qd3 b6 13. Bg5 g6 14. Rad1 Bb7 15. Rfe1 Re8 16. Bb3 b5 17. Bh6 b4 18. axb4 Nxb4 19. Qe2 Qb6 20. Ne5 Nbd5 21. Bc4 Rac8 22. Na4 Qa7 23. b3 Bb4 24. Qf3 Ba8 25. Re2 Nh5 26. Qg4 f5 27. Qh4 Be7 28. Qh3 Nhf4 29. Bxf4 Nxf4 30. Qe3 Nxe2+ 31. Qxe2 Bd5 32. Bxd5 exd5 33. Qf3 Red8 34. g4 Qb7 35. Nc5 Bxc5 36. dxc5 fxg4 37. Nxg4 Rf8 38. Qe3 Qg7 39. Rxd5 Rce8 40. Ne5 Rf5 41. f4 0-1