Beginner Exercise 111 / Solution

Sub-page of BeginnerExercise111

White first

[Diagram]

White kills

W1 will simply kill Black by a squared four.

[Diagram]

White failure 1

W1 here is a mistake. B2 lives with bent four.

[Diagram]

White failure 2

W1 here is another mistake. After B2 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 B1 and B3. This results in the same diagram as "White failure2" diagram, in which Black lives.

If W2 at B3, then Black can even play tenuki.

[Diagram]

Black failure 1

If Black atari at B1, then W2 kills Black in a bulky five.


Conclusion

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



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