[Event "IBM"]
[Site "Amsterdam"]
[Date "1961.??.??"]
[Round "7"]
[White "De Rooi, Paul"]
[Black "Van den Berg, Carel"]
[Result "1-0"]

1. e4 c5 2. Nf3 e6 3. c4 Nc6 4. b3 Nf6 5. d3 Be7 6. Be2 Nxe4 7. dxe4 Bf6 8. Bd2 Bxa1 9. Nc3 Bxc3 10. Bxc3 O-O 11. e5 Qe7 12. h4 Rd8 13. Bd3 d6 14. Bxh7+ Kf8 15. Ng5 dxe5 16. Qh5 Qf6 17. Rh3 g6 18. Qf3 Qf5 19. Qxf5 gxf5 20. h5 Ke7 21. f4 exf4 22. Bg7 b6 23. Rh4 Bb7 24. Rxf4 Nb4 25. Bxf5 Rd7 26. Bb1 f5 27. Nxe6 Kxe6 28. Bxf5+ Ke7 29. Bxd7 Nd3+ 30. Kd2 Nxf4 31. Bg4 Bxg2 32. h6 Ng6 33. Bh5 Nh8 34. Ke3 Bc6 35. Kf4 Be8 36. Bf3 Rd8 37. Bxh8 Bg6 38. Kg5 Bb1 39. Bf6+ 1-0