Xuanxuan Qijing Problem 209 / Solution

Solution

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Solution

B1 captures the corner.

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White can try the same thing on the other side, but B1 successfully stops the white group from escaping.

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Attempt

shevious: However, Black B3 is not good.
White will make the same shape at both sides, and...

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Attempt continued

White W10 is a good move and can escape by double ko.

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Main line

Black B3 and B5 are the right moves.

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Main line - continued

For White W20, Black will catch three White stones.
(Black B21 at black+circle)
Original White stones cannot escape.




Failure

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Most of other B1 results in White escapes towards the side.

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Cont.

Notice the jump at W6 is important. Eventually, Black will have to allow White to make an eye or the black structure collapes. See also very artificial problem and its attempt page.

[Diagram]

Does this work?

Even if it works, it is not as elegant.

See discussion page for more detail.


See also:

Xuanxuan Qijing Problem 164

Xuanxuan Qijing Problem 248

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