[Event "IBM"]
[Site "Amsterdam"]
[Date "1969.??.??"]
[Round "8"]
[White "Barendregt, Johan"]
[Black "Hartoch, Robert G"]
[Result "0-1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. Re1 e6 6. c3 Nge7 7. d4 cxd4 8. cxd4 Qb6 9. Na3 d5 10. exd5 Nxd5 11. Nc4 Qc7 12. Bg5 O-O 13. Bh4 Nce7 14. Bg3 Qd8 15. Nd6 Nf5 16. Nxf5 gxf5 17. Qd2 a6 18. Bc4 b5 19. Bb3 Bb7 20. Rac1 Qb6 21. Ne5 Rad8 22. Rcd1 Kh8 23. Bh4 f6 24. Nf3 a5 25. Bg3 a4 26. Bc2 Rc8 27. Rc1 Ne7 28. Qb4 Nd5 29. Qd2 Rfe8 30. Bd3 Rxc1 31. Rxc1 Bc8 32. Rc5 Bd7 33. Bh4 Bf8 34. Rxd5 exd5 0-1