[Event "IBM"]
[Site "Amsterdam"]
[Date "1969.??.??"]
[Round "1"]
[White "Barendregt, Johan"]
[Black "Damjanovic, Mato"]
[Result "0-1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. c3 Nf6 6. Re1 O-O 7. d4 cxd4 8. cxd4 d5 9. e5 Ne4 10. Nc3 Nxc3 11. bxc3 Na5 12. Ba3 Bd7 13. Bd3 Rc8 14. e6 fxe6 15. Ng5 Rf6 16. Re3 Rxc3 17. Bb4 Rxd3 18. Qxd3 Nc4 19. Ree1 a5 20. Bc3 b5 21. Nf3 b4 22. Bd2 Rxf3 23. gxf3 e5 24. dxe5 Bf5 25. Qd4 e6 26. Rac1 Qc7 27. f4 Bf8 28. Be3 Qc6 29. f3 a4 30. Qa7 Qb5 31. Rxc4 dxc4 32. Rd1 Bd3 33. Qd4 b3 34. axb3 axb3 35. Qb2 c3 36. Qxc3 b2 37. Qc8 Qb3 0-1