Kyu Exercise 30 / Solution

Solution  

The solution is to make a throw-in at . Now Black cannot escape nor live.

Solution

If captures, then pulls back. Later, Black a can be answered with White b.

at a would be a ko, allowing Black to try connection with at .

Failures

Failure I  

The first thing that comes to mind is to block at , but this make miai for life on a and b.

Failure II  

Reordering moves does not work: a and b are miai.