[Event "Biel (Women)"]
[Site "Biel SUI"]
[Date "1981.07.27"]
[EventDate "1981.07.24"]
[Round "4"]
[Result "1/2-1/2"]
[White "Corry Vreeken"]
[Black "Gertrude Baumstark"]
[ECO "B50"]
[WhiteElo "2120"]
[BlackElo "2125"]
[PlyCount "30"]

1. e4 c5 2. Nf3 d6 3. d4 Nf6 4. Nc3 cxd4 5. Qxd4 a6 6. Bg5 Nc6 7. Qd2 e6 8.  O-O-O Qc7 9. Kb1 Bd7 10. Nd4 b5 11. Bxf6 gxf6 12. f4 Qb6 13. Nxc6 Bxc6 14. Bd3  O-O-O 15. a3 Kb8 1/2-1/2