Xuanxuan Qijing Problem 179 / Solution

Solution

[Diagram]

Solution

B2 is necessary to prevent white from living in the corner.

W3 connects with first line ogeima connection.

[Diagram]

Black's resistance (W4 at white+circle)

It's not possible to cut the connection, but black can capture some white stones. However, black does't have enough space after W4 recaptures.

[Diagram]

Black's resistance cont.

With dead stones removed, it's easy to see that black can't make two eyes.



Failure

[Diagram]

Without 'a' first, black can live.

[Diagram]

W3 is on the wrong side, the connection doesn't work due to shortage of liberties.

[Diagram]

W3 is at the point of symmetry, but it doesn't work.


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