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.



133 WSNotcher last edited by Dieter on September 16, 2008 - 17:42
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