[Event "Vidmar Memorial-03"]
[Site "Portoroz/Ljubljana"]
[Date "1975.06.04"]
[Round "3"]
[White "Mariotti, Sergio"]
[Black "Ribli, Zoltan"]
[Result "1/2-1/2"]

1. b3 e5 2. Bb2 d6 3. e3 Nf6 4. d4 exd4 5. Qxd4 Nc6 6. Bb5 Qd7 7. Qa4 Be7 8. Nf3 a6 9. Bxc6 bxc6 10. Nc3 c5 11. Qf4 Qf5 12. Qxf5 Bxf5 13. O-O-O O-O-O 1/2-1/2