Some Endgame Problem 9 / Solution

Sub-page of SomeEndgameProblem9

The informal analysis

[Diagram]

Solution

W1 is the solution, not a.

[Diagram]

Solution

What is so painful for Black is that W5 is practically a sente move during the endgame phase. After B6, then White can tenuki, so White has reduced Black's territory in sente.

[Diagram]

Variation

B2 does not work either. Black loses even more this way.

[Diagram]

Failure

W1 is considered a failure in this problem. After B4, if White saves the two stones at a, then it is gote. Nothing more than an itch for Black.



The more formal analysis

[Diagram]

Almost sente

Bill: W1 - W3 is fairly large, about 8.7 points.

[Diagram]

Large gote

W10 connects at black+circle.

B1 is almost as large, about 8.4 (8.5 points when White is komaster). So White will often be able to play here with sente.

Later B5 - W6 is sente, and even later B9 - W10 is sente.


This is a copy of the living page "Some Endgame Problem 9 / Solution" at Sensei's Library.
(OC) 2009 the Authors, published under the OpenContent License V1.0.
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