[Event "IBM"]
[Site "Amsterdam"]
[Date "1972.??.??"]
[Round "?"]
[White "Ree, Hans"]
[Black "Langeweg, Kick"]
[Result "1/2-1/2"]

1. c4 Nf6 2. g3 e6 3. Bg2 c5 4. Nf3 Nc6 5. d4 cxd4 6. Nxd4 a6 7. O-O Be7 8. Nc3 O-O 9. b3 Qa5 10. Bb2 Rd8 11. Rc1 d5 12. cxd5 exd5 13. Nxc6 bxc6 14. Na4 Bb7 15. Qd4 Re8 16. e3 Bf8 17. Nc5 Bc8 18. Qa4 Qb5 19. Bxf6 gxf6 20. Qd4 a5 21. Na4 Ba3 22. Rcd1 Kg7 23. Qh4 Bf5 24. Rd4 Bg6 25. Rfd1 Re5 26. Qg4 1/2-1/2