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KanazawaProblem41

 

Kanazawa Solution 41
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    Keywords: Problem

[Diagram]
Diag.: White lives

Protect the side that is weakened by the marked stone.


[Diagram]
Diag.: Continuation 1

[Diagram]
Diag.: Failure at 3

White can't play 7 at the marked point because of damezumari.


[Diagram]
Diag.: Continuation 2


[Diagram]
Diag.: Failure 1

The marked stones turn the hane at 4 into an atari to which White must react, so that Black can take away the second eye with 6.


[Diagram]
Diag.: Failure 2

This White 1 is punished the same way as her mistake in the follow-up to the correct answer (see above).


[Diagram]
Diag.: Failure 3

Enlarging the eye space at 1 invites Black to play at the vital point 2. Now 3 and 4 are miai. After 4, White has to prevent the capture and take a liberty at a upon which Black takes away the other eye at b.


[Diagram]
Diag.: Failure 4

Connecting at 1 in this way makes poor eye shape. Black plays on the vital point of this shape. Even if White continues with 5 at a, Black will be able to almost fill her eye space with a farmer's hat.


[Diagram]
Diag.: Failure 5

Connecting at 1 here is symmetric to Failure 4 and is once again countered by playing on the vital point.



Addition:

[Diagram]
Diag.: White is dead

In this symmetric situation, both legs of the white group have no liberties outside of the EyeSpace. Now a move at a or at b will be answered by a move at the point diagonally underneath. White is dead.



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(OC) 2003 the Authors, published under the OpenContent License V1.0.