Gokyo Shumyo, Section 1, Problem 46 / Solution

Authors:
Solution diagram: Hashimoto Utaro 9p
Variations: Dieter 1k, unkx80

White lives

The play at is the vital point.

Continuation

The points a and b are miai now.

Failure

After , Black can almost fill White's eye space with a bulky five. White can do nothing to prevent that without turning her eye space into another dead shape.

Failure 2

xela: What is black's response to ?

continuation; at

xela: this is the best I can find so far...

continuation continuation

This way, white lives.

Variation

I can almost see how black can make a ko, but it looks like white has enough liberties to squeeze... have I missed something here?

continuation

(if black tries at 'a' or 'b', white still plays )

continuation

Refutation.

unkx80: Given your , the refutation is easy - and turns it into a direct ko.

Refutation.

For this , Black kills with and .

I was thinking, what about followed by ?

For , then and kills without ko. If this is the case, then this really improves over your suggested .

But there is this . If , then becomes sente, so lives.

If this , then and lives too.

There is a short discussion at /Failure.

Back to Kanazawa Tesuji Series
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Gokyo Shumyo, Section 1, Problem 46 / Solution last edited by Unkx80 on January 25, 2007 - 16:27
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