[Event "Interzonal-06"]
[Site "Amsterdam"]
[Date "1964.06.21"]
[Round "23"]
[White "Stein, Leonid"]
[Black "Darga, Klaus"]
[Result "1/2-1/2"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 11. d4 Nd7 12. b3 exd4 13. cxd4 Nc6 14. Nc3 Bf6 15. Be3 cxd4 16. Nxd4 Nxd4 17. Bxd4 Bb7 18. Ne2 Re8 19. Ng3 g6 20. b4 d5 21. Bxf6 Qxf6 22. exd5 Rxe1+ 23. Qxe1 Bxd5 24. Bb3 Bxb3 25. axb3 Qe5 26. Qd1 Nf6 27. Rc1 Re8 28. Qf3 Ne4 29. Nxe4 Qxe4 30. Qc3 Qe5 31. Qc5 Kg7 32. Rd1 Qf6 1/2-1/2