[Event "Zuerich"]
[Site "Zuerich"]
[Date "1959.05.30"]
[Round "9"]
[White "Kupper, Josef"]
[Black "Keller, Dieter"]
[Result "1/2-1/2"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Bxc6 dxc6 7. d3 Bg4 8. h3 Bxf3 9. Qxf3 Nd7 10. Nd2 O-O 11. Nc4 Bc5 12. Be3 Qe7 13. Qg4 Kh8 14. Bxc5 Nxc5 15. f4 exf4 16. Rxf4 Ne6 17. Rf2 Qc5 18. Qf5 Rae8 19. Rf1 f6 20. Qxc5 Nxc5 21. g4 Kg8 22. Kg2 b6 23. e5 Nd7 1/2-1/2