KyuExercise201/Solution

Sub-page of KyuExercise201
[Diagram]

Black to play

It looks very hard to avoid a seki but Black can set up a ko with B1-B5. However where can he find a ko threat?

[Diagram]

Black to play

The key is B1, due to shortage of liberties white can't connect at B3. But after Black captures at B3 White has no ko threats and Black captures everything.


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