Xuanxuan Qijing Problem 41 / Solution


Traditionally, this line was given as the solution, B1 on the point of symmetry leading to a ko.

No ko  

Although the first diagram was long considered the solution, Go Seigen came up with this W4, the tesuji known as the ugly sagari. So really there is nothing black can do. The problem is now often given as a problem for white, how to respond to B1

Anon: What happens if B plays B5 at W6?

No ko  

unkx80: I guess this. Note, B7 has no time to play the throw-in at W8, as W8 can capture by snapback at a.

Xuanxuan Qijing Problem 41 / Solution last edited by tapir on April 22, 2014 - 16:13
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