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BeginnerExercise73

 

Beginner Exercise 73 / Solution
Sub-page of BeginnerExercise73

[Diagram]
A solution?

Blake: After the marked stone has been played, I don't see how White can kill the group. It guarantees an eye at a.


[Diagram]
Proofs I

After a or b, White is either in atari or close to it.


[Diagram]
Proofs II

After B2, the eyes are obvious at a and b.

unkx80: B2 can be played at c too.


[Diagram]
Proofs III

(Best for White.)


[Diagram]
Failure

Dansc: Enlargening the eyespace with B1 fails. Black's eyespace is a bulky five, so W2 kills the black group - a and b are miai for kill now. The bulky five shape is the same reason a black stone at W2 would make the group alive.





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