Endgame Problem 7 / Solution
Solution
![[Diagram]](../../diagrams/17/22bc461662d3fdf0c1b381c51d988293.png)
Solution.
is the tesuji used in this position. The correct moves for both players is
,
,
, and black gains sente again.
![[Diagram]](../../diagrams/33/184b090c66def7b7b636e3f2ef6e4530.png)
Solution.
Since ko threats favour black, blocking at
is unreasonable.
Failure
![[Diagram]](../../diagrams/35/ec4a3c6feb7738d9f4bd74f42e184e56.png)
Failure.
This is a normal endgame move, but it does not gain as much as the solution sequence.
![[Diagram]](../../diagrams/18/323d5fa9f9753a605d4adb076747878c.png)
Failure.
Black loses points.
![[Diagram]](../../diagrams/39/398f51856792a9761b93f09cf1d41fad.png)
Failure.
Black loses points too.
![[Diagram]](../../diagrams/11/8b8f789938e1d898da9359c6cac7f5ac.png)
White's play
White should play
.Later, a-b is Black's sente. Compared to the solution diagram, White makes 4 points. So this is a 4 point reverse sente for her.
See also: