Beginner Exercise 40 / Solution

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Solution

[Diagram]

Solution

B1! is a good throw-in tactics to break the miai. White's strongest resistance, W2!, maximizes the eyespace and sets up a ko for life - White capture at a next secures two eyes, regardless of the corner one.

(The resulting shape is similar to dogleg four with a cutting point inside.)

[Diagram]

Weak resistance 1

If White captures the throw-in, B3 makes the points a and b miai to remove one eye from White's position.

[Diagram]

Weak resistance 2

W2 connect destroys a potential eye there. B3 kills.

[Diagram]

Weak resistance 3

Ignoring the situation doesn't make it go away.


Failures

[Diagram]

Failure 1

B1 only destroys the eye on the outside, but W2 makes the eye in the corner. B3 and W4 are miai for living.

[Diagram]

Failure 2

In this diagram, W2 lives with two eyes.



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