Beginner Exercise 87 / Solution

Sub-page of BeginnerExercise87
[Diagram]

Main Line

lavalyn: Optimal for both players.

DamienSullivan: Can't B1 go at B5 for the same result?

unkx80: No. Then W2 at B1 kills.

[Diagram]

White tries a little harder

Black catches two White stones in oiotoshi.

Isn't W2 atari? Couldn't White just capture by playing W4 at a? -phooky

lavalyn: Yes, W2 is atari. Thus B3 removes one of the white pieces surrounding the threatened group.

[Diagram]

Destroying eye space doesn't work either

With White's stones isolated and the cut impossible, White's connection still yields only a bent four not in the corner.


[Diagram]

Doesn't this work?

SAS: No, this doesn't work. White can play W2 at B3 and get a ko.


hotcoffee: Umm... What about this - a ko doesn't seem inevitable?

[Diagram]

W4 is forced, as B5 at W4 is two eyes. Then black can play B7 at W4, or to the right of W4, for life. White can resist with W4 at a, but there is a snapback. White's best response is identical to the main line in the first diagram.



unkx80: Snapback, ya, but...

[Diagram]

Still a ko.

[Diagram]

Still a ko.

[Diagram]

Still a ko.



This is a copy of the living page "Beginner Exercise 87 / Solution" at Sensei's Library.
(OC) 2009 the Authors, published under the OpenContent License V1.0.
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