[Event "Interzonal-06"]
[Site "Amsterdam"]
[Date "1964.06.17"]
[Round "21"]
[White "Tringov, Georgi Petrov"]
[Black "Portisch, Lajos"]
[Result "0-1"]
1. e4 e6 2. d3 d5 3. Nd2 Nf6 4. Ngf3 Nc6 5. g3 dxe4 6. dxe4 e5 7. Bg2 Bc5 8. O-O O-O 9. Qe2 Qe7 10. c3 a5 11. Nb3 Bb6 12. Nh4 a4 13. Nd2 Bg4 14. Bf3 Qe6 15. Bxg4 Qxg4 16. Qxg4 Nxg4 17. h3 Nf6 18. Re1 g6 19. Nc4 Bc5 20. Nf3 Rfe8 21. Bg5 Nh5 22. Be3 Bf8 23. Rad1 b5 24. Na3 Bxa3 25. bxa3 Red8 26. c4 Rxd1 27. Rxd1 bxc4 28. Rc1 Nf6 29. Rxc4 Ra6 30. Nd2 Ne8 31. Kf1 Nd6 32. Rc1 Kf8 33. Ke2 Ke7 34. f4 Kd7 35. Rf1 Ra8 36. fxe5 Nxe5 37. Bc5 Rb8 38. Bxd6 Kxd6 39. Rb1 Rxb1 40. Nxb1 Nc4 41. Nc3 Nb6 42. Kd3 Ke5 43. Nb1 f5 44. exf5 gxf5 45. Nd2 Kd5 46. Nf3 Nc4 47. Nh4 Nd6 48. Ng2 c5 49. g4 c4+ 50. Ke3 Ke5 51. Nf4 fxg4 52. hxg4 Ne4 53. Ne2 Nf6 54. Kf3 Nd5 55. g5 c3 56. Nc1 Kd4 57. Ke2 Nf4+ 58. Kd1 Ne6 59. Ne2+ Kd3 60. Nc1+ Kc4 61. Kc2 Nxg5 62. Ne2 Ne4 63. Ng1 0-1