Xuanxuan Qijing Problem 60 / Solution

Solution

XuanxuanQijingProblem60/Solution#toc2 XuanxuanQijingProblem60/Solution#toc3
[Diagram]

Solution

W1 kills.

If W1 escapes, the black group doesn't have enough eye space.

Therefore, we will only consider the case when B2 is at a or b.


Resistance 'a'

[Diagram]

B4 prevents W1 and W3 from escaping

[Diagram]

Cont. 1

B6 can't be at W7 due to shortage of liberties.

[Diagram]

Cont. 2


Resistance 'b'

[Diagram]

After W3, the five black+circle are dead.




Failure

[Diagram]

(W1 can also be at r)

[Diagram]

(W1 can also be at r or s)

[Diagram]

(W1 can also be at r)


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