Kyu Exercise 87 / Solution

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[Diagram]

Analysis.

A simple analysis here. It should be easy to see that B1 here lives, saving at least the right side of the group.

[Diagram]

Solution.

Thus W1 is the vital point. The next thing to see is that if B2 makes an eye in the corner, then W3 can cut the Black group into two. Please observe that W3 is connected to either W1 or white+circle by the box connection.

Also note that a and b are miai, so there is no eye there.

[Diagram]

Variation.

If B2 connects, then W3 destroys the eye in sente because it threatens to cut the Black group into two.

[Diagram]

Variation.

If B2 here, then W3 kills.


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