[Event "Hoogovens"]
[Site "Beverwijk"]
[Date "1964.01.21"]
[Round "11"]
[White "Portisch, Lajos"]
[Black "Parma, Bruno"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 Qe7 5. g3 Nc6 6. Bg2 Bxd2+ 7. Nbxd2 d6 8. O-O a5 9. e4 e5 10. d5 Nb8 11. Ne1 O-O 12. Nd3 Na6 13. f4 Bd7 14. Kh1 c6 15. fxe5 dxe5 16. Qe2 Ne8 17. Qe3 c5 18. b3 b6 19. a3 Nd6 20. b4 Nb7 21. Rab1 Qd6 22. bxa5 Nxa5 23. Rb2 Nc7 24. Nf2 Ra6 25. Bh3 Bxh3 26. Nxh3 Rfa8 27. Ng1 Nb7 28. Ne2 Ra4 29. Qb3 R4a6 30. Qe3 Ra4 1/2-1/2