Joseki-related life-and-death example 8

    Keywords: Joseki, Life & Death

This example shows how the carpenter's square may be formed.

[Diagram]

Joseki

First we start with this 4-5 point 4-3 approach joseki. B6 can be played at a, but Black can also choose to play elsewhere.

[Diagram]

Continuation

If Black chooses to play elsewhere, then White has the forcing move at W1.

[Diagram]

Continuation

At a later time, W1 to W3 seals up the left side, making it solid.

[Diagram]

Carpenter's square

After the previous diagram, the W1 to W3 sequence can be seen as sente, because it turns the black group into a carpenter's square. The placement at a will turn the corner into a ko.

The carpenter's square is extensively discussed on its own page.


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(OC) 2007 the Authors, published under the OpenContent License V1.0.
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