[Event "IBM"]
[Site "Amsterdam"]
[Date "1964.07.28"]
[Round "7"]
[White "Lehmann, Heinz"]
[Black "Dueckstein, Andreas"]
[Result "1/2-1/2"]

1. Nf3 e6 2. g3 f5 3. Bg2 Nf6 4. O-O Be7 5. c4 O-O 6. Nc3 d6 7. d3 e5 8. e4 Nc6 9. Nd5 fxe4 10. dxe4 Bg4 11. Qd3 Qd7 12. Ne1 Nd4 13. f3 Nxd5 14. cxd5 Bh5 15. Be3 c5 16. dxc6 Nxc6 17. Qd2 Bf7 18. Nd3 Rfd8 19. f4 exf4 20. Nxf4 Ne5 21. b3 Bf6 22. Rac1 Qb5 23. Bh3 Re8 24. Nd5 Bxd5 25. exd5 Nd3 26. Rc4 Ne5 27. Rb4 Qa6 28. Bf5 Re7 29. Qc2 Ng6 30. Bxg6 hxg6 31. Qxg6 Qe2 32. Re4 Bd4 33. Rxe7 Bxe3+ 34. Rxe3 Qxe3+ 35. Kh1 Re8 36. Qf7+ Kh7 37. Rf4 Qc1+ 38. Kg2 Re2+ 39. Rf2 Rxf2+ 40. Qxf2 Qg5 41. Qd4 Qf5 42. Qd2 a6 43. h4 Qe4+ 44. Kh2 b5 45. Qd1 g6 46. Qd2 Qf5 47. a4 Qf3 48. axb5 axb5 49. b4 Qe4 50. Kg1 Qf3 51. Kh2 Qe4 52. Qa2 Kh6 53. Qb2 Kh7 54. Qd2 Qf3 55. Qg2 Qg4 56. Qb2 Qe4 57. Qd2 Qf3 58. Qa2 Qe4 59. Qa7+ Kh6 60. Qa1 Kh7 1/2-1/2