Gokyo Shumyo, Section 1, Problem 19 / Solution
![[Diagram]](../../diagrams/19/f25851c450848328097ea8f237651bb1.png)
Black lives
is the only conceivable move: no other move prevents White from linking up her stone inside the black group and destroying his eye space.
![[Diagram]](../../diagrams/2/5086e323692144d407467ff3671b8582.png)
Main line
White can make a ko shape but can't win the ko: black has enough liberties to squeeze. Black is alive.
![[Diagram]](../../diagrams/10/6464ee5d4cb885897f2b1c0c1b060c5a.png)
Variation 1
knows only one answer.
![[Diagram]](../../diagrams/20/abf4dc0b5353cbc7486cc9c14b2f28e2.png)
Variation 2
![[Diagram]](../../diagrams/43/89d8997e7bdeaf54c059eb21eb20b869.png)
Question
Question: What after White hanes immediately?
xela: I think black can simply block at a.
![[Diagram]](../../diagrams/24/9b1b242c42b72917d2a97046b67ed11f.png)
White hane, followup
Here, a and b are miai, so black is alive.
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