[Event "IBM"]
[Site "Amsterdam"]
[Date "1962.08.21"]
[Round "6"]
[White "Hartoch, Robert G"]
[Black "Heidenfeld, Wolfgang"]
[Result "0-1"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ne2 cxd4 8. cxd4 f6 9. exf6 Nxf6 10. O-O Qb6 11. Nf3 Bd6 12. b3 e5 13. dxe5 Nxe5 14. Nxe5 Bxe5 15. Rb1 O-O 16. Bf4 Qd6 17. Bxe5 Qxe5 18. Ng3 g6 19. Qd2 Bd7 20. Qb4 a5 21. Qb6 Bc6 22. Qc5 Nd7 23. Qc2 Qf6 24. a3 Ne5 25. b4 axb4 26. axb4 Ra3 27. Be2 b5 28. Rb3 Rxb3 29. Qxb3 Nc4 30. Qd3 Kg7 31. Bd1 Qe5 32. Ne2 Bd7 33. Nc3 Bf5 34. Qg3 Re8 35. Qxe5+ Rxe5 36. f4 Re8 37. Bf3 d4 38. Nxb5 d3 39. Nd4 Be4 40. Rd1 0-1