Gokyo Shumyo, Section 1, Problem 97 / Attempts

Analysis  

a is an half-eye, but if the stones get captured, then a becomes a full eye.

Attempt  

Dieter: doesn't look necessary here, but it is ^[1]:

Var iv  

Dieter: Up 'till is part of the solution. The next move to think about is the astute .

Var iv  

unkx80: Looks like there are a few ways of solving this. One which looks nicer might be this.

Var iv  

Dieter: Yes. I now understand why that white stone on the upper left komoku is in place. But let's leave it here. You are a quick thinker unkx80.

unkx80: Which komoku is it? Anon: Black should play 5 at a.

 

Black isn't going anywhere.

 

Black isn't going anywhere.

 

I have seen this given as the final part of the solution.

Failure  

Bill: For a while I thought that was a good move. ;-) I missed , which I now think is correct.

Failure (ii)  

One point is that, thanks to , White can afford to play here.