[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1973.01.23"]
[Round "7"]
[White "Hartoch, Robert G"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]

1. Nf3 g6 2. e4 c5 3. c4 d6 4. d4 cxd4 5. Nxd4 Nf6 6. Nc3 Nc6 7. f3 Bg7 8. Nc2 Nd7 9. Be3 Bxc3+ 10. bxc3 Qa5 11. Qd2 Nc5 12. Be2 O-O 13. Nd4 Ne5 14. Rb1 Qc7 15. O-O b6 16. Bh6 Re8 17. Nc2 f6 18. Nb4 e6 1/2-1/2