Gokyo Shumyo, Section 1, Problem 40 / Solution


Black to live  

B1 is the vital point. It clearly secures two eyes at the circled points.

Main line  
Continuation 1  

Note what a difference an extra white stone at a would make.

Continuation 2  

Again, an extra stone at a would make the difference.


Once the vital point has been played - B1 in the main line - the rest is not so difficult any more. Finding that point is the main challenge here. Let's have a look at how things can go wrong.

Failure 1  

One is tempted to cover the two-space gap with a move like B1 here. However, White strikes at the vital point after reducing the eyespace. B3 at W6 is met by W4 at B5.

Failure 2  

The other ceiling defense at B1 is defeated by W2 and W4!. W2 at a also kills with more difficult variations.


Gokyo Shumyo, Section 1, Problem 40 / Solution last edited by hnishy on January 14, 2023 - 03:51
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