Xuanxuan Qijing Problem 243 / Solution

Solution

[Diagram]
Solution  

There are many things Black can do with the black+circle stone. But before Black starts to play out anything with the black+circle stone, the solution is to first jump down to the first line with B1, which may be quite a surprise to uninitiated readers.

[Diagram]
Main line  

This appears to be the main line shown in various problem collections. This variation also explains why the black+circle stone is in the problem.

[Diagram]
Variation  

Capturing the Black stone only gives a false eye if Black manages to occupy the vital point of B3.

[Diagram]
Variation  

W2 doesn't work either.

[Diagram]
Variation  

W2 cannot capture the Black stone.


Failure

[Diagram]
Canonical failure  

This is the canonical failure diagram, which is a connect-and-die. This is not the only sequence that leads to this end result, for example, B1 at B2, W2 at W6, B3 at B1, W4 at W2 et cetra will also lead to this end position.


Xuanxuan Qijing Problem 243 / Solution last edited by Iepur on May 31, 2015 - 08:32
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