[Event "IBM"]
[Site "Amsterdam"]
[Date "1962.08.16"]
[Round "3"]
[White "Rellstab, Ludwig Sr"]
[Black "Van den Berg, Carel"]
[Result "0-1"]

1. d4 Nf6 2. c4 e6 3. Nd2 c5 4. e3 cxd4 5. exd4 Nc6 6. Ngf3 d5 7. Be2 Be7 8. O-O O-O 9. a3 b6 10. cxd5 Qxd5 11. Nb1 Bb7 12. Nc3 Qd6 13. Be3 Rfd8 14. Qc2 Rac8 15. Rfd1 Ng4 16. Rac1 Na5 17. h3 Nxe3 18. fxe3 Qg3 19. e4 Bf6 20. b4 Nc6 21. e5 Be7 22. Qe4 Na5 23. Qb1 Nc4 24. Ne4 Qf4 25. Rxc4 Rxc4 26. Bxc4 Bxe4 27. Qb3 g6 28. Be2 Rc8 29. Bc4 Bxf3 30. gxf3 Qg3+ 31. Kf1 Qxh3+ 32. Ke2 Qg2+ 33. Ke3 Bg5+ 34. Ke4 Qg3 35. Rf1 Qf4+ 36. Kd3 Qd2+ 37. Ke4 Rxc4 38. Qxc4 Qe3# 0-1