Xuanxuan Qijing Problem 74 / Solution

Solution

XuanxuanQijingProblem74/Solution#toc5 XuanxuanQijingProblem74/Solution#toc4 XuanxuanQijingProblem74/Solution#toc2 XuanxuanQijingProblem74/Solution#toc3
[Diagram]

Solution

After B1 the black group is alive. W2 at a is the most interesting attempt White has, but we will also take a look at W2 at b, c, and d.


Resistance 'a'

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Continue

B5 and B7 can be switched.

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After dead stones are removed

Black has x or y to make two eyes.


Resistance 'b'

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B3 is important to prevent bulky five eye shape.


Resistance 'c'

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Resistance 'd'

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Failure

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In Resistance 'a', if Black forgets to capture with r first, the atari at x doesn't work anymore.

[Diagram]

(B1 can also be at r or s)

[Diagram]


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