[Event "IBM"]
[Site "Amsterdam"]
[Date "1972.??.??"]
[Round "?"]
[White "Robatsch, Karl"]
[Black "Ree, Hans"]
[Result "0-1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. g3 g6 7. Bg2 Nxd4 8. Qxd4 Bg7 9. Nd5 O-O 10. Qd1 Nxd5 11. exd5 Bf5 12. O-O Qc7 13. c3 b5 14. a4 a6 15. Qe2 Bd7 16. Qxe7 Rfe8 17. Qh4 bxa4 18. Rxa4 Bxa4 19. Qxa4 Qb8 20. Bh3 Qb5 21. Bd7 Qxa4 22. Bxa4 Re4 23. Bc6 Rb8 24. f3 Re2 25. Rf2 Re1+ 26. Rf1 Rxf1+ 27. Kxf1 Bxc3 0-1