[Event "Interzonal-09b"]
[Site "Petropolis"]
[Date "1973.07.24"]
[Round "1"]
[White "Panno, Oscar"]
[Black "Gheorghiu, Florin"]
[Result "1/2-1/2"]

1. Nf3 c5 2. b3 d5 3. e3 Nf6 4. Bb2 e6 5. c4 dxc4 6. bxc4 Nc6 7. Be2 Be7 8. O-O O-O 9. Ne5 Nxe5 10. Bxe5 Bd7 11. Bf3 Qc8 12. d3 Bc6 1/2-1/2