GokyoShumyoSection3Problem90/Solution
![[Diagram]](../../diagrams/48/dc4054054335e514e9a18309df79e198.png)
Solution
A tricky problem.
is the clever defense to secure a ko for life.
at 'a' is a mistake because...
![[Diagram]](../../diagrams/11/a42a81f6c5a312529fa7ecfa34eaed0e.png)
Variation
...White can't play at 'b' nor 'c'. Black will play at 'b' next and kill with a 5-point nakade. Then, what happens if
at
?