Beginner Exercise 172 / Solution

Sub-page of BeginnerExercise172
[Diagram]

White dies from a lack of creativity.

A tesuji is required, eh? Well, the simplistic move at W1 obviously doesn't work, maybe I'll sacrifice something...

[Diagram]

White lives, but can black put up a better fight?

This is not black's best resistance - the kill still works.

[Diagram]

Black has a foil!

Yep, black can do this. W3 at a doesn't prevent B4 either. White cannot engage in self-indulgent reading! Playing W3 immediately at B4 doesn't work either - black has enough liberties to push at W3 and falsify the other eye.

[Diagram]

Easier to refute... Or is it?

Capturing the marked stone doesn't get an eye. But wait, why not W3 at B4?

[Diagram]

Black can't kill the other eye.

Black can't play at a because of a shortage of liberties created by W1. An approach move at b or c is required first, which gives white enough time to play a. B2 at a obviously doesn't work (white captures saving the eye), nor does b, which makes a sente for white. B2 at c has the same result as this diagram. Playing B2 at d is easily refuted by W3 at B2 making for two real eyes on the bottom. There are a couple large ko threats left here for black; W3 at d would prevent one at the cost of one point.



This is a copy of the living page "Beginner Exercise 172 / Solution" at Sensei's Library.
(OC) 2009 the Authors, published under the OpenContent License V1.0.
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