[Event "IBM"]
[Site "Amsterdam"]
[Date "1971.07.28"]
[Round "13"]
[White "Smyslov, Vassily V"]
[Black "Donner, Jan Hein"]
[Result "1/2-1/2"]

1. c4 g6 2. Nc3 Bg7 3. d4 Nf6 4. Bg5 d6 5. e3 O-O 6. Be2 c6 7. Nf3 Bg4 8. h3 Bxf3 9. Bxf3 e6 10. O-O d5 11. cxd5 cxd5 12. Qb3 Qd7 13. Na4 b6 14. Rfc1 Nc6 15. Nc3 Rfc8 16. Be2 Qb7 17. Qd1 Ne8 18. Bf4 Bf8 1/2-1/2