[Event "Zuerich"]
[Site "Zuerich"]
[Date "1961.06.11"]
[Round "11"]
[White "Matulovic, Milan"]
[Black "Keller, Dieter"]
[Result "1/2-1/2"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bd2 Bxc3 7. bxc3 Ne4 8. Qg4 Kf8 9. Bc1 c5 10. Bd3 Nxc3 11. dxc5 Qa5 12. Bd2 Qxc5 13. Ne2 Ne4 14. Bxe4 dxe4 15. Qxe4 Nc6 16. f4 b6 17. Be3 Qb4+ 18. Qxb4+ Nxb4 19. Nd4 Ba6 20. a4 Rc8 21. a5 b5 22. Kd2 Nd5 23. Nb3 Nxe3 24. Kxe3 Ke7 25. Nd4 Rc3+ 26. Kd2 Rc4 27. Ke3 Rc3+ 28. Kd2 Rc4 1/2-1/2