[Event "IBM"]
[Site "Amsterdam"]
[Date "1969.??.??"]
[Round "13"]
[White "Ree, Hans"]
[Black "Barendregt, Johan"]
[Result "1-0"]

1. d4 d6 2. c4 g6 3. Nc3 Bg7 4. e4 c5 5. d5 e6 6. Nf3 Ne7 7. Be2 e5 8. a3 h6 9. b4 Na6 10. O-O O-O 11. Rb1 f5 12. Ne1 b6 13. Nd3 g5 14. bxc5 Nxc5 15. Nxc5 bxc5 16. Qa4 f4 17. Qd1 Ng6 18. Bg4 Nh4 19. Be6+ Kh8 20. Qg4 Kh7 21. Bd2 f3 22. g3 Ng6 23. Bxc8 Rxc8 24. Rb7 Rc7 25. Rfb1 Rf6 26. Nd1 Qe7 27. Rb8 Qf7 28. Ba5 Rd7 29. Bd8 Rxd8 30. Rxd8 Qc7 31. Rd7 Qa5 32. Ne3 Nf8 33. Rdb7 Kg8 34. Nf5 Rg6 1-0