[Event "Interzonal-04"]
[Site "Portoroz"]
[Date "1958.09.04"]
[Round "18"]
[White "Olafsson, Fridrik"]
[Black "Tal, Mihail"]
[Result "1/2-1/2"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 Qb8 11. Qxb8 Raxb8 12. Bf4 Rbc8 13. Ne5 d6 14. Nxc6 Bxc6 15. Bxd6 Bxd6 16. Rxd6 Bxg2 17. Kxg2 Rxc4 18. Rad1 g6 19. f3 Kg7 20. e4 e5 21. R1d2 Rfc8 22. Kf2 R4c6 23. Ke3 Kf8 24. Rxc6 Rxc6 25. Rd8+ Ke7 26. Ra8 a5 27. g4 g5 28. Rb8 Re6 29. Nd5+ Nxd5+ 30. exd5 Rh6 31. Rb7+ Ke8 32. Ke4 Rxh2 33. Rxb6 Re2+ 34. Kf5 h6 35. Rxh6 Rxb2 36. Kxe5 Rxa2 37. Ra6 Ra3 38. Ra8+ Kd7 39. Ra7+ Ke8 40. Ra8+ Kd7 41. Ra7+ Ke8 42. Kd6 Kf8 43. Kd7 a4 44. d6 Kg7 45. Ke8 Rxf3 46. Rxa4 Re3+ 47. Kd8 f5 48. gxf5 Kf6 49. Ra6 Kxf5 50. Kc7 g4 51. d7 Re7 52. Kd6 Rxd7+ 53. Kxd7 g3 54. Kd6 g2 55. Ra1 Ke4 1/2-1/2