Endgame Problem 7 / Solution

Solution.  

is the tesuji used in this position. The correct moves for both players is , , , and black gains sente again.

Solution.  

Since ko threats favour black, blocking at is unreasonable.

Failure

Failure.  

This is a normal endgame move, but it does not gain as much as the solution sequence.

Failure.  

Black loses points.

Failure.  

Black loses points too.