Some Endgame Problem 12 / Solution

As this is a rather open-ended question, there might be other valid reasons other than those stated here.

[Diagram]

White play without the forcing moves

This is one of the normal white endgame plays if black doesn't play the forcing sequence. First white plays W1-W3 in gote and later W5-B10 is sente.

[Diagram]

White play after forcing moves

If now W1-W3 then later when white plays W5-B6, white cannot continue pushing at a due to shortage of liberties induced by the presence of black+circle.

[Diagram]

White play after forcing moves

Later, W7-B8 is sente, leaving a 1/3-point ko.

[Diagram]

White play without the forcing moves

If the forcing moves had not been played, white has the option of descending at W1. This option is absent after the forcing moves have been played.


This is a copy of the living page "Some Endgame Problem 12 / Solution" at Sensei's Library.
(OC) 2009 the Authors, published under the OpenContent License V1.0.
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