[Event "IBM"]
[Site "Amsterdam"]
[Date "1969.??.??"]
[Round "12"]
[White "Tatai, Stefano"]
[Black "Donner, Jan Hein"]
[Result "1/2-1/2"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 O-O 6. Bd3 Nc6 7. e5 dxe5 8. dxe5 Nd5 9. Nxd5 Qxd5 10. Qe2 Bf5 11. Bxf5 gxf5 12. Be3 f6 13. exf6 Bxf6 1/2-1/2