Beginner Exercise 272 / Solution

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Solution

ProtoDeuteric: You should notice that white's two stones on the left cannot approach the middle two black stones to capture them, but that the stones on the other side can approach. B1 is the key here. It makes it no longer possible for white to approach from either side. One might think this is only seki, but the seki is only temporary. Once black plays "a" (he really doesn't even have to unless absolutely forced to), black can capture the left two stones and thus kill the group.



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