[Event "Olympiad-19 Preliminaries A"]
[Site "Siegen"]
[Date "1970.09.08"]
[Round "4"]
[White "Smyslov, Vassily V"]
[Black "Durhuus, Olaf"]
[Result "1-0"]

1. c4 Nf6 2. Nc3 g6 3. d4 Bg7 4. Bg5 d6 5. e3 c5 6. Be2 Qa5 7. Qd2 cxd4 8. exd4 O-O 9. Nf3
Nc6 10. d5 Nb4 11. O-O Na6 12. a3 Qd8 13. b4 b6 14. Nd4 Bb7 15. Bh6 Nc7 16. Bxg7 Kxg7 17.
Rad1 a5 18. b5 Nd7 19. f4 f5 20. Bf3 Nc5 21. Rfe1 Qe8 22. Qe3 Rf7 23. Ne6+ N7xe6 24. dxe6
Rf6 25. Bxb7 Nxb7 26. Nd5 Nc5 27. Nxf6 exf6 28. Rxd6 Ne4 29. Rd7+ 1-0