[Event "Olympiad-19 Preliminaries A"]
[Site "Siegen"]
[Date "1970.09.08"]
[Round "4"]
[White "Diez del Corral, Jesus"]
[Black "Barriera, F"]
[Result "1-0"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 e5 7. Nde2 Be7 8. Bg2 Be6 9. h3 Nbd7 10. a4 O-O 11. O-O Qc7 12. Be3 Rac8 13. g4 h6 14. Ng3 Nb6 15. Nd5 Nfxd5 16. exd5 Bd7 17. b3 Bh4 18. c4 Qd8 19. a5 Na8 20. Ne4 Be7 21. c5 Bb5 22. Re1 Nc7 23. b4 Ne8 24. Rc1 Bg5 25. Nxg5 hxg5 26. Qd2 f6 27. Be4 Kf7 28. c6 1-0