Gokyo Shumyo, Section 1, Problem 69 / Solution

Main line: Hashimoto Utaro
Variations: Dieter

Main line  

Black starts at the 1-2 point. Usually, White keeps this shape to one eye, but here there is aji in black+circle. The key move is B5. After B7, Black can either capture four stones in shortage of liberties at a, or make two eyes at b.

Variation at 6  


Failure at 1  

Because of the presence of white+circle, B1 doesn't work. B3 and W4 are miai, and so are a and b.

Failure at 5  

If B5 here, White destroys his eye with W6.

Failure at 5  

Now B7 and W8 are miai to take the eye away.

Failure (ii) at 5  

B5 here is not sufficiently forcing on White's four stones. White takes the time to create a killing shape with W6. (unkx80 has written specifically about this shape at rectangular six in the corner.)

Go to Problem 70
Back to Kanazawa Tesuji Series

Gokyo Shumyo, Section 1, Problem 69 / Solution last edited by Unkx80 on April 24, 2004 - 21:04
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