[Event "IBM"]
[Site "Amsterdam"]
[Date "1962.08.15"]
[Round "2"]
[White "Heidenfeld, Wolfgang"]
[Black "Henneberke, Frans"]
[Result "0-1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Be7 4. d4 d6 5. Nc3 Nf6 6. d5 Nb8 7. O-O O-O 8. Ne1 a6 9. a4 Bg4 10. Be2 Bxe2 11. Qxe2 Ne8 12. Nd3 Nd7 13. f4 exf4 14. Bxf4 Bf6 15. Nd1 g6 16. c3 Qe7 17. N1f2 Bg7 18. Rae1 f5 19. Qc2 Qf7 20. Qb3 b6 21. Nh3 h6 22. exf5 Qxf5 23. Rf3 Qh5 24. Rfe3 a5 25. Bg3 g5 26. Qc4 Bf6 27. Nhf2 Rc8 28. Qc6 Nb8 29. Qc4 Ng7 30. Ng4 Qg6 31. Rf1 h5 32. Nxf6+ Rxf6 33. Rxf6 Qxf6 34. Qe4 Qf5 35. Be1 Rf8 36. Qxf5 Nxf5 37. Re6 Kf7 38. Bd2 Rg8 39. Nf2 Ng7 40. Re2 Nf5 41. Nh3 g4 42. Ng5+ Kf6 43. Re6+ Kg7 44. c4 Nd7 45. Bc3+ Kf8 46. Nh7+ Kf7 47. Nf6 Nc5 48. Nxg8 Nxe6 49. dxe6+ Kxg8 50. Bf6 Ng7 51. e7 Ne8 52. Bg5 Kf7 53. Kf2 Ng7 54. Ke3 Nf5+ 55. Ke4 Nxe7 56. h3 gxh3 57. gxh3 Ke6 58. Bd2 Nc6 59. Bc3 Ne5 60. b3 Nd7 61. b4 axb4 62. Bxb4 Ne5 63. a5 bxa5 64. Bxa5 c5 65. Kf4 Nxc4 66. Bc3 d5 67. Be1 d4 0-1