[Event "Interzonal-06"]
[Site "Amsterdam"]
[Date "1964.05.28"]
[Round "7"]
[White "Tringov, Georgi Petrov"]
[Black "Porat, Yosef"]
[Result "1/2-1/2"]

1. e4 e6 2. d3 d5 3. Nd2 c5 4. Ngf3 Nc6 5. g3 dxe4 6. dxe4 b6 7. c3 Nf6 8. Bb5 Bb7 9. Qa4 Qc7 10. Ne5 Rc8 11. Qxa7 Bd6 12. Bxc6+ Bxc6 13. Qxc7 Rxc7 14. Nxc6 Rxc6 15. f3 Nd7 16. Nc4 b5 17. Nxd6+ Rxd6 18. Ke2 Ke7 19. Be3 Ra8 20. a3 Rc6 21. f4 Nb6 22. b3 f5 23. exf5 Nd5 24. Rhe1 exf5 25. Kd2 Nxe3 26. Rxe3+ Kf6 27. Kc2 h6 28. c4 bxc4 29. bxc4 g5 30. Rae1 gxf4 31. gxf4 Rd8 32. Rd3 Rxd3 33. Kxd3 Ra6 34. Ra1 Kg6 35. a4 Kh5 36. a5 Kg4 37. Ke3 Re6+ 38. Kd3 Ra6 39. Ke3 Re6+ 40. Kd3 1/2-1/2