[Event "IBM"]
[Site "Amsterdam"]
[Date "1962.08.30"]
[Round "11"]
[White "Henneberke, Frans"]
[Black "Donner, Jan Hein"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. Nc3 d5 5. e3 cxd4 6. exd4 Be7 7. b3 O-O 8. Bd3 b6 9. O-O Bb7 10. Bb2 Nc6 11. Rc1 Rc8 12. Re1 Qd6 13. Qe2 Rfe8 14. Red1 Qf4 15. Qe3 Qxe3 16. fxe3 dxc4 17. Bxc4 Nb4 18. h3 a6 19. a3 Nbd5 20. Nxd5 exd5 21. Bd3 Bd6 22. Ne5 Ne4 23. Rxc8 Rxc8 24. Rc1 f6 25. Rxc8+ Bxc8 26. Nc6 Bd7 27. Nb4 Bxb4 28. axb4 Nd6 29. Bc3 Bf5 30. Bxa6 Bc2 31. Be2 Bxb3 32. Bd3 Bc4 33. Bc2 Nb5 34. Bb2 Kf7 35. e4 dxe4 36. Bxe4 Nd6 37. Bc2 g6 38. Kf2 Ke6 39. Ke3 Kd5 40. g3 Bf1 41. Bb3+ Bc4 42. Bc2 Ba2 43. Bd3 Bb1 44. Bf1 g5 45. g4 f5 46. gxf5 Bxf5 47. Bc1 h6 48. Kf3 Be4+ 49. Kg4 Nf5 50. Ba6 Kxd4 51. Bb2+ Ke3 52. Be5 Ne7 53. Kh5 1/2-1/2