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BeginnerExercise33

 

Beginner Exercise 33 Solution
  Difficulty: Beginner   Keywords: Problem, Question

[Diagram]
Diag.: Solution

There is already an eye in the corner, but Black needs to create a second eye. The only way to make the second eye and to save the black group is to set up the ko at 1.

Hawkeye - Could you show the continuation of the ko solution? I am a beginner and although I thought I understood the ko I still don't follow how a white play at D18 doesn't eventually take the black group. Are we to assume black can create something urgent elsewhere on the board?

unkx80: Yes and no. The point is, this is a local situation, we do not know how many of these "urgent points", known as ko threats exist on other parts of the board, and which player owns them. Please see basic ko threats for more discussion on this matter.

Hawkeye - Understood. Thanks!


[Diagram]
Diag.: Failure

Black 1 connects, but White 2 destroys the eye instead. Now Black is dead.





This is a copy of the living page "Beginner Exercise 33 Solution" at Sensei's Library.
(OC) 2003 the Authors, published under the OpenContent License V1.0.