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CriticalNotchers

 

133 WSNotcher
    Keywords: Life & Death, Shape

[Diagram]
133WS

This is a critical notcher. It lives and anything weaker is unsettled. The vital point is a:


[Diagram]
133WS

if White plays there, Black can live with a seki in gote.


[Diagram]
133WN

If the corner is not solid, the above sequence doesn't work, because White can give atari at W5 and play at a next.



Dieter



This is a copy of the living page "133 WSNotcher" at Sensei's Library.
(OC) 2003 the Authors, published under the OpenContent License V1.0.