Gokyo Shumyo, Section 1, Problem 97 / Attempts
unkx80: I find this a difficult problem.
Dieter: Me too, unkx80.
![[Diagram]](../../diagrams/13/25032a20e55779856280b2bbecf0adef.png)
Analysis
a is an half-eye, but if the
stones get captured, then a becomes a full eye.
![[Diagram]](../../diagrams/14/b1c4d7568155a955ee16ac678034a23b.png)
Attempt
Dieter:
doesn't look necessary here, but it is [1]:
![[Diagram]](../../diagrams/16/5d29206b670cb1bf4299227b404ac88c.png)
Variation I
![[Diagram]](../../diagrams/16/96a9e2f8bc271b721fbfc5f96c501f42.png)
Variation II
![[Diagram]](../../diagrams/23/4dd054602fef42515874e2317a621200.png)
Variation III
![[Diagram]](../../diagrams/44/f2259f289ff7f06e44f511744e3fc68e.png)
Var iv
Dieter: Up 'till
is part of the solution. The next move to think about is the astute
.
![[Diagram]](../../diagrams/52/c8191ee7aa8748cad08f7fd581a0457e.png)
Var iv
unkx80: Looks like there are a few ways of solving this. One which looks nicer might be this.
![[Diagram]](../../diagrams/2/b51795d499f7f9e106e9df8773f4f394.png)
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?
[1]
![[Diagram]](../../diagrams/21/43e0f6fd16a3b113f16eaffb05767efe.png)
White 4 necessary
![[Diagram]](../../diagrams/2/af53da654d39754c6a03494b9b4d1a85.png)
Failure
Bill: For a while I thought that
was a good move. ;-) I missed
, which I now think is correct.
![[Diagram]](../../diagrams/45/3d965b1c097aad369e4d47b60bd788fa.png)
Failure (ii)
One point is that, thanks to
, White can afford to play
here.
![[Diagram]](../../diagrams/2/c192ab947324eb1f71af8965d48dcea1.png)
Extended problem