[Event "Interzonal-09b"]
[Site "Petropolis"]
[Date "1973.08.15"]
[Round "16"]
[White "Panno, Oscar"]
[Black "Smyslov, Vassily V"]
[Result "1/2-1/2"]

1. Nf3 Nf6 2. c4 c5 3. Nc3 b6 4. d4 cxd4 5. Nxd4 Bb7 6. f3 e6 7. e4 Bc5 8. Nc2 O-O 9. Be3 d5 10. cxd5 exd5 11. Bxc5 bxc5 12. exd5 Nxd5 13. Nxd5 Bxd5 14. Be2 Nc6 15. O-O Qg5 16. Qc1 Qf6 17. Rf2 Rad8 18. Ne3 1/2-1/2