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KanazawaProblem97

 

Kanazawa Problem 97 / Attempts
Sub-page of KanazawaProblem97

unkx80: I find this a difficult problem.

Dieter: Me too, unkx80.

[Diagram]
Analysis

a is an half-eye, but if the WC stones get captured, then a becomes a full eye.


[Diagram]
Attempt

Dieter: W4 doesn't look necessary here, but it is [1]:


[Diagram]
Variation I

[Diagram]
Variation II

[Diagram]
Variation III

[Diagram]
Var iv

Dieter: Up 'till B5 is part of the solution. The next move to think about is the astute W6.


[Diagram]
Var iv

unkx80: Looks like there are a few ways of solving this. One which looks nicer might be this.


[Diagram]
Var iv

Dieter: Yes. I now understand why that white stone on the upper left komoku is in place. But let's leave it here. You are a quick thinker unkx80.

unkx80: Which komoku is it?



[1]

[Diagram]
White 4 necessary


[Diagram]
Failure

Bill: For a while I thought that B1 was a good move. ;-) I missed W4, which I now think is correct.


[Diagram]
Failure (ii)

One point is that, thanks to WC, White can afford to play W4 here.



[Diagram]
Extended problem


This is a copy of the living page "Kanazawa Problem 97 / Attempts" at Sensei's Library.
(OC) 2004 the Authors, published under the OpenContent License V1.0.