[Event "Zuerich"]
[Site "Zuerich"]
[Date "1961.05.31"]
[Round "4"]
[White "Gligoric, Svetozar"]
[Black "Keller, Dieter"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O Nc6 8. a3 Ba5 9. cxd5 exd5 10. dxc5 Bxc3 11. bxc3 Bg4 12. c4 Ne5 13. Bb2 Nxf3+ 14. gxf3 Bh3 15. Kh1 dxc4 16. Bxc4 Bxf1 17. Qxf1 Qd2 18. Bxf6 gxf6 19. Qh3 Qc3 20. Rg1+ Kh8 21. Bd3 Qxd3 22. Qh6 Qg6 23. Rxg6 fxg6 24. e4 1/2-1/2