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KanazawaProblem40

 

Kanazawa Problem 40 / Solution
Sub-page of KanazawaProblem40

[Diagram]
Black to live

Black 1 is the vital point. It clearly makes one eye at the circled point, and White can't prevent another eye to the left of 1.


[Diagram]
Main line

[Diagram]
Continuation 1

Note what a difference an extra white stone at a would make.


[Diagram]
Continuation 2

Again, an extra stone at a would make the difference.



Once the vital point has been played - 1 in the main line - the rest is not so difficult any more. Finding that point is the main challenge here. Let's have a look at how things can go wrong.

[Diagram]
Failure 1a

One is tempted to cover the two-space gap with a move like Black 1 here. However, White strikes at the vital point. If 5 at 8, then 6 at 5.


[Diagram]
Failure 1b

This results in ko.



Go to Problem 41



This is a copy of the living page "Kanazawa Problem 40 / Solution" at Sensei's Library.
(OC) 2004 the Authors, published under the OpenContent License V1.0.