RTG Problem 77 / Solution

Solution  

Black lives unconditionally after . This is the only move for life.

Solution  

If cuts off the stone, then jumps. Subsequently, must be answered with , which captures all the White stones. at a would be a failure, which will be explained in the failure diagrams.

Solution  

The best White can do is to play at , allowing Black to make an eye at the bottom in sente with . Then makes the second eye for life.

Failure  

The and combination is a failure.

Failure  

Up to , White lives with two eyes, and Black is unconditionally dead.

Failure  

The simple hane at is met by the block at . Subsequently, a and b are miai for the kill.