BeginnerExercise321/Solution
![[Diagram]](../../diagrams/19/2fffcd9ccb407a1382120205c1c0ec90.png)
ko
The exchange of
and
reduces White's liberties. White must start the throw-in ko at the corner.
![[Diagram]](../../diagrams/39/69494f12368e7f53a1e20ba948b03394.png)
Better defense
here loses. This line works when the marked stone is at a, in which case
at b leads to an approach ko favorable to White.