Gokyo Shumyo, Section 1, Problem 50 / Solution

[Diagram]

Main line

B3! and B5! is the only way to live.

[Diagram]

Continuation

White cannot protect at a because of shortage of liberties and Black will make two eyes.


[Diagram]

Some more about the position

Black's formation is a carpenter's square. W1 is a wrong attack; W1 at a to c all lead to ko. See carpenter's square page for details.


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