Xuanxuan Qijing Problem 238 / Solution

Solution

[Diagram]

Solution

Black can't make an eye in the corner.



A Basic Shape

[Diagram]

This is a shape that occurs in many tsumego problems.

[Diagram]

B3 and B5 at B1, W4 above B1

Black captures some white stones through snapback.

[Diagram]

However, there's no eye in the corner for black.
See also Xuanxuan Qijing Problem309 for another problem with this shape.

Failure

[Diagram]

As long as W1 is not at B2, black is alive after B2.

[Diagram]

Notice now the snapback in the corner result in this, which is differenct from the shape before.


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(OC) 2012 the Authors, published under the OpenContent License V1.0.
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