BQM50
Keywords: Life & Death, Question
We can consider this shape to be a weak L+2-group - the weakness being the absent stone at a. On top of that, Black has in place. What would be the status of this group ?
It takes little to realize that White can live by playing at or a. The real question is whether Black can kill.
After , it is pointless to continue with Black a - White b. In fact, the marked point provides the extra liberty for the group to be alive
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