[Event "Interzonal-04"]
[Site "Portoroz"]
[Date "1958.08.05"]
[Round "1"]
[White "Petrosian, Tigran V"]
[Black "Sherwin, James T"]
[Result "1-0"]

1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 a6 5. Bxc4 e6 6. O-O c5 7. e4 cxd4 8. e5 Nfd7 9. Qxd4
Nc6 10. Qe4 Qc7 11. Bf4 b5 12. Bb3 Nc5 13. Qe2 Nxb3 14. axb3 Bb7 15. Nc3 Be7 16. Ne4 O-O
17. Rac1 Rad8 18. Rc3 Qb8 19. Qe3 Kh8 20. Nd6 Nb4 21. Nxb7 Qxb7 22. Bg5 Nd5 23. Qe4 Qa7
24. Bxe7 Qxe7 25. Rc6 Qb4 26. Qc2 Qg4 27. h3 Qh5 28. Qe4 a5 29. Rc5 b4 30. Rfc1 Ra8 31.
Ra1 h6 32. Kh2 Ne7 33. Rcxa5 Rad8 34. Ra7 Rfe8 35. Rb7 Kg8 36. Qxb4 Nc6 37. Qe4 Rc8 38.
Ra6 Nd8 39. Rb4 Qf5 40. Qxf5 exf5 41. Rc4 Rb8 42. b4 Ne6 43. Ne1 Red8 44. Rd6 Rxd6 45.
exd6 Rb6 46. Rc8+ Kh7 47. Nc2 Rxd6 48. b5 Rb6 49. Na3 Rb7 50. Rc6 Nd4 51. Rc5 f4 52. Rd5
Ne6 53. Nc4 Kg6 54. b6 Kf6 55. b4 Ke7 56. Ra5 Kd7 57. Ra7 Nd8 58. Na5 1-0