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223WSNotcher
    Keywords: Life & Death

No outside liberties

[Diagram]
223WS

W5 kills. Black can't play ata because he is short of liberties.


[Diagram]
223WS

In this variation, White will be able to almost fill the eye shape with a farmer's hat at a.


With outside liberties

[Diagram]
223WS

The outside liberties are important here: if Black has one at a for instance, he can play B6 and make a second eye.



This is a copy of the living page "223WSNotcher" at Sensei's Library.
(OC) 2004 the Authors, published under the OpenContent License V1.0.