Under the Stones Problem 4 / Solution
![[Diagram]](../../diagrams/8/af50a8df5b65b7164406e74d37572921.png)
Ko
This is a ko. Assuming
is a ko threat and black answers with
then black cannot kill by playing under the stones as shown in the next two diagrams.
![[Diagram]](../../diagrams/44/7ac4f55378f600c39e1d31294a819c75.png)
Continuation 1
![[Diagram]](../../diagrams/12/7e38a49828b04143ace08eab347625ce.png)
Continuation 2
And white is alive because of his second eye at a.
![[Diagram]](../../diagrams/13/2b81ca09b39a9961022ef2a97529cf38.png)
White's resistance is not enough
is not the best move.
under
.
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