Xuanxuan Qijing Problem 35 / Solution

[Diagram]

solution (1)

First moves are reasonably easy (white W9 at W7)

Dudzik: What about W3 at W5? I cannot see any way for black to avoid this transposing into the main line.

[Diagram]

solution (2)

Next, the ko under the stones (W6 is the first incredible move; W8 takes back the ko at W2)

[Diagram]

solution (3)

It is an approach ko, so the fight spread to the edge... (B5 takes back W2); W8 is an inner ko threat

[Diagram]

solution (4)

B4 takes back W1, W7 takes back. Is Black out at last?

[Diagram]

solution (5)

W5 is the last important twist : if played one point left, Black can escape

[Diagram]

solution (6)

All those antics won't save Black now

[Diagram]

solution (7)

Moves B4, W5 and W7 under the black stones (this is a two stones edge squeeze)

[Diagram]

solution (8)



[Diagram]

Solution (5) - Geta variation

The geta (or net) also seems to work. This led Denis Feldmann to suggest a variation in which the net isn't possible.



Attempts and comments

shevious: Why so complicated solution is needed?

[Diagram]

Solution like variation 2

This solution is almost idential to Variation2.

[Diagram]

Variation

I think this line is different from Variation2, but still interesting. Black cannot put at 'a' instead of B8 because of shortage of liberties. (white W9 at W7)


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