Xuanxuan Qijing Problem 233 / Solution



B3/W4 before B1/W2 is the same.

Either way, black will win the capturing race.

A Basic Shape


This is one of the basic shapes in capturing race.

It has 5 liberties if white plays first.


It takes 3 moves before black needs to respond with 1 move, so there are 2 liberties here.


After black captures, there are still 3 liberties. Therefore, there are 5 liberties total.


White can try to capture the one black stone. However, there are 2 liberties left, so black still ends with 5 liberties total.



Starting the race directly result in ko.


This is similar to the previous diagram.


Attempt by creating this kind of eye shape doesn't work, because it only has 3 liberties.

See also: Big Eye Liberties and Big Eyes Can Be Small In The Corner.

Xuanxuan Qijing Problem 233 / Solution last edited by Unkx80 on July 5, 2008 - 21:56
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