[Event "Mar del Plata International Open-05"]
[Site "Mar del Plata"]
[Date "1972.03.31"]
[Round "7"]
[White "Cristobal, Ruben"]
[Black "Otaolea, A"]
[Result "1-0"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. g3 Qc7 6. Bg2 Nc6 7. O-O Nf6 8. Nxc6 bxc6 9. c4 Bb7 10. Nc3 d5 11. cxd5 cxd5 12. exd5 Nxd5 13. Nxd5 exd5 14. Bxd5 Be7 15. Bf4 Qb6 16. Qa4+ Kf8 17. Bxb7 Qxb7 18. Rac1 Qxb2 19. Qd7 Re8 20. Rc8 1-0