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BeginnerExercise111

 

Beginner Exercise 111 Solution
  Difficulty: Beginner   Keywords: Problem

White first

[Diagram]
White first

White 1 will simply kill Black by a squared four.


[Diagram]
White failure 1

If White 1, then Black 2 lives with bent four.


[Diagram]
White failure 2

After Black 2 atari, White found that playing at a is suicide, so it is not possible to almost fill the eye space into a bulky five.



Black first

[Diagram]
Black first

Black first will play 1 and 3. This results in the same diagram as White's second failure diagram, in which Black lives.

If White 2 is played at 3, then Black can even play tenuki.


[Diagram]
Black failure 1

If Black atari at 1, then White 2 kills Black in a bulky five.



Conclusion

This group is unsettled. If White first, the group is killed; if Black first, the group lives.



This is a copy of the living page "Beginner Exercise 111 Solution" at Sensei's Library.
(OC) 2004 the Authors, published under the OpenContent License V1.0.