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KanazawaProblem36

 

Kanazawa Solution 36
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    Keywords: Problem

[Diagram]
Black lives

B1 makes miai of a and b. At the same time, it protects against a placement at c. The shape composed here, recurs in problems 18 and 34. I'll call it the OkiWantsIkkenTobi for now.


[Diagram]
Main line

White makes a placement at W2, but Black calmly takes the miai point at B3. White seemingly connects underneath, but Black has the throw in tesuji at B7. White captures, next ..


[Diagram]
Main line (continuation)

White is in shortage of liberties. Look how BC helps.



Variations later. Feel free to add some of yourself.

KarlKnechtel: Here's one:

[Diagram]
Wrong (1)

Black thinks himself clever for making an eye at a, and keeping the stones on the right connected via a bamboo joint. But when White probes, Black effectively has six on the second line in gote, and so the double hane and the placement at W8 kill. I think.

If Black doesn't defend the cut, there are some other possibilities. One is the descent, trying to claim a second eye:


[Diagram]
Wrong (1a)

White calmly makes the placement at W4, and Black still can't profit by extending the eye space - the hane this time leaves black with a filled farmer's hat big eye.

The other is to secure the eye at a and hope for another at b or c:


[Diagram]
Wrong (1b)

I'm not sure how to refute this, since d and e seem to be miai for life. Maybe W2 is wrong?

unkx80: Black lives here. W2 is wrong.


[Diagram]
Wrong (1) corrected

unkx80: White has to play at W2, threathening to connect at a.


[Diagram]
Wrong (1) corrected

Black's strongest play is at B1, threatening to make an eye in the corner. If W2 plays at a, Black can make a nasty ko at b.


[Diagram]
Wrong (1) corrected

B1 to B5 attempts to create a seki. However, W6 is a tesuji that will kill Black.


[Diagram]
Wrong (1) corrected

B1 and B3 try to make a bent four.


[Diagram]
Wrong (1) corrected

But the placement at W1 kills the entire black group. If W1 carelessly plays atari on the five black stones at a, Black lives at W1 instead, with the under the stones technique.

KarlKnechtel: For completeness, note Black cannot live via under the stones by sacrificing six stones either:


[Diagram]
Wrong (1) corrected

White is forced to capture at W3 (!) because otherwise Black captures at a and has two eyes. Black tries to continue via standard under the stones technique, but ends up almost filled with a dead shape (there is no need to force the issue with a play at a because of this filling):


[Diagram]
Wrong (1) corrected


Problem 37
Back to KanazawaTesujiSeries



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