Xuanxuan Qijing Problem 35

  Difficulty: Advanced   Keywords: Life & Death, Problem
[Diagram]

All stones shown. White to kill.

This problem assumes that there are no other stones on this board, and therefore simply saying that the result is "ko" is insufficient. Solvers are required to evaluate the outcome of the ko-fight.

Lim Yoo Jong calls this problem "the emperor of life and death problems".

% Malcolm: The only reference I've found is by Denis Feldmann, saying Lim Yoo Jong gave the problem this name. I think it's incorrect to say "the french call this problem"...

This problem is a contender for the title of the most difficult problem ever.

/Solution

/Variation 1 An improvement on the classical problem by Denis Feldmann

/Variation 2 A much simpler version


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