[Event "IBM"]
[Site "Amsterdam"]
[Date "1973.??.??"]
[Round "6"]
[White "Ree, Hans"]
[Black "Kavalek, Lubomir"]
[Result "1/2-1/2"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. d4 c6 6. c4 d6 7. Nc3 Qa5 8. h3 e5 9. e4 exd4 10. Nxd4 Qc5 11. Nb3 Qxc4 12. Qxd6 a5 13. Bg5 Nbd7 14. Rfd1 Qb4 15. e5 Ne8 16. Qxb4 axb4 17. Ne4 Bxe5 18. Be7 f5 19. Bxf8 Kxf8 20. Nec5 Nxc5 21. Nxc5 Bd6 22. Rdc1 Ra5 23. Nb3 Ra7 24. Nd2 Be6 25. Nc4 Be7 26. a3 Bf6 27. Rab1 b5 28. Ne3 Ba2 29. axb4 Bxb1 30. Rxb1 Ra6 31. Rc1 Bxb2 32. Rxc6 Rxc6 33. Bxc6 Nc7 34. Nd5 Nxd5 35. Bxd5 Bc3 36. Bc6 Bxb4 37. Bxb5 1/2-1/2