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KyuExercise26

 

Kyu Exercise 26 Solution
   

[Diagram]
Preventing the cut

Black B1 puts White's marked stone in atari, so White backs off with W2. After B3, White can't play at a as it would be auto-atari (but b is a ko threat). This isn't optimal play by White, though.


[Diagram]
If white plays differently...

A ko fight ensues. White has to find the first ko threat.



This is a copy of the living page "Kyu Exercise 26 Solution" at Sensei's Library.
(OC) 2004 the Authors, published under the OpenContent License V1.0.