115NNNotcher

    Keywords: Life & Death, Ko

There are several moves that live for Black (e.g. see 115NS Notcher), but white can make ko:

[Diagram]

W makes ko

This sequence assumes Black can't escape using the B4 stone. Of course, the ability of W7 to start the ko depends on the existence of the white+circle stone.

[Diagram]

W makes ko, continued

Also note that even though it looks like White takes the ko first, Black has a free ko threat, so white must find the first threat.


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(OC) 2009 the Authors, published under the OpenContent License V1.0.
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