[Event "Zuerich"]
[Site "Zuerich"]
[Date "1961.06.11"]
[Round "11"]
[White "Keres, Paul"]
[Black "Walther, Edgar"]
[Result "1/2-1/2"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. O-O O-O 9. a4 Be6 10. f4 Nbd7 11. Be3 exf4 12. Rxf4 Ne5 13. Nd4 Rc8 14. Nf5 Bxf5 15. Rxf5 Re8 16. Kh1 Qd7 17. Rf4 Qe6 18. Bd4 1/2-1/2