Xuanxuan Qijing Problem 331 / Solution

[Diagram]

False solution (1)

Getting out doesn't work.

[Diagram]

False solution (2)

Black is captured in a snap-back (at white+circle).

[Diagram]

Solution (1)

W2 must go down, as after the exchange of a for b, the ladder in the false solution (1) would work.

[Diagram]

False solution ?

Question about the previous statement: This would be the position as described above. Where is the ladder for black?

[Diagram]

Solution (2)

W2 is an important tesuji: if played immediately at W4, Black plays at W2 himself, and White has only two liberties. Now B5, etc. repeat the same manoeuvre on the right, and we get to...

[Diagram]

Solution (3)

Now for the really tricky part (it is easier if White captures): the incredible B5, breaking the symmetry at last!! And Black concludes with a double atari at b, on the last point of symmetry. :-)


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