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KanazawaProblem36

 

Kanazawa Solution 36
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    Keywords: Problem

[Diagram]
Diag.: Black lives

Black 1 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]
Diag.: Main line

White makes a placement at 2, but Black calmly takes the miai point at 3. White seemingly connects underneath, but Black has the throw in tesuji at 7. White captures, next ..


[Diagram]
Diag.: Main line (continuation)

White is in damezumari. Look how the marked stone helps.



Variations later. Feel free to add some of yourself.

KarlKnechtel: Here's one:

[Diagram]
Diag.: Wrong (1)

Black thinks himself clever for making an eye at a, and keeping the stones on the right connected via a BambooJoint. But when White probes, Black effectively has six on the second line in gote, and so the double hane and the placement at 8 kill. I think.

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


[Diagram]
Diag.: Wrong (1a)

White calmly makes the placement at 4, and Black still can't profit by extending the EyeSpace - 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]
Diag.: Wrong (1b)

I'm not sure how to refute this, since d and e seem to be miai for life. Maybe White 2 is wrong?

unkx80: Black lives here. White 2 is wrong.


[Diagram]
Diag.: Wrong (1) corrected

unkx80: White has to play at 2, threathening to connect at a.


[Diagram]
Diag.: Wrong (1) corrected

Black's strongest play is at 1, threatening to make an eye in the corner. If White 2 plays at a, Black can make a nasty ko at b.


[Diagram]
Diag.: Wrong (1) corrected

Black 1 to 5 attempts to create a seki. However, White 6 is a tesuji that will kill Black.


[Diagram]
Diag.: Wrong (1) corrected

Black 1 and 3 tries to make a bent four.


[Diagram]
Diag.: Wrong (1) corrected

But the placement at White 1 kills the entire black group. Beware though, if White 1 carelessly plays atari on the five black stones at a, Black lives at 1 instead with the under the stones technique.

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


[Diagram]
Diag.: Wrong (1) corrected

White is forced to capture at 3 (!) because otherwise Black captures at a and has two eyes. Black tries to continue via standard under the stones technique, but ends up AlmostFilled with a dead shape (there is no need to force the issue with a play at a because of this filling):


[Diagram]
Diag.: Wrong (1) corrected


Problem 37
Back to KanazawaTesujiSeries



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