Perez Perez, Francisco Jose VS Ulvestad, Olaf 1961.01.02

[Event "Reggio Emilia-03 1960/61"]
[Site "Reggio Emilia"]
[Date "1961.01.02"]
[Round "8"]
[White "Perez Perez, Francisco Jose"]
[Black "Ulvestad, Olaf"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. e4 d6 7. Bd3 e5 8. Ne2 Nc6 9. O-O Bg4 10. f3 Bh5 11. Be3 b6 12. Qa4 Qd7 13. Bg5 Ng8 14. Ng3 Bg6 15. d5 Na5 16. Qc2 f6 17. Be3 Ne7 18. f4 O-O 19. f5 Be8 20. a4 Kh8 21. Rf3 Ng8 22. Nf1 Qc7 23. Rh3 Nb7 1/2-1/2