Xuanxuan Qijing Problem 65 / Solution

Solution

[Diagram]

The group is dead after W1.

Black has 3 stronger resistance, let's look at them one by one.

[Diagram]

Resistance 'a'

After W3, black can't get both 'x' and 'y'.

[Diagram]

Resistance 'b'

Black is unable to capture W3 even by playing 'x' due to shortage of liberties.

[Diagram]

Resistance 'c'

B2 and B4 looks like good responses, but W5 aims to capture with 'x' or destroy black's eye with 'y'.



Failure

[Diagram]

Compare with the solution, W3 here is too late.

Instead of blocking, B4 secures an eye.

Next if white tries to connect out, black 'a' is good enough.

[Diagram]

W3 is interesting. B4 at 'a' result in death.

[Diagram]

W1 is a rather weak attempt.

Black has all these marked moves to make life.

[Diagram]

For other W1, B2 is sufficient.


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(OC) 2011 the Authors, published under the OpenContent License V1.0.
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