[Event "Interzonal-06"]
[Site "Amsterdam"]
[Date "1964.05.26"]
[Round "6"]
[White "Porat, Yosef"]
[Black "Darga, Klaus"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 O-O 6. Nf3 Na6 7. Bd2 Nxc5 8. a3 Bxc3 9. Bxc3 Nce4 10. Bxf6 Nxf6 11. e4 d6 12. Bd3 b6 13. O-O Bb7 14. Nd4 Nd7 15. Rad1 a6 16. f4 g6 17. Nf3 b5 18. Kh1 Qb6 19. cxb5 axb5 20. Qf2 Qxf2 21. Rxf2 Nc5 22. Bxb5 Nxe4 23. Rc2 Bd5 24. Bd3 Rfb8 25. Nd4 Ra4 26. Bxe4 Bxe4 27. Re2 Bd5 28. Kg1 Rc4 29. Kf2 Kf8 30. g3 Ke7 31. b4 Kd7 32. Red2 Rc3 33. Rd3 Rbc8 34. Ke3 Rxd3+ 35. Rxd3 1/2-1/2