KyuExercise200/Solution
I've tried to cover it yesterday with some great help from the folks of the KTL, do you think it's reasonable?
Proposed Solution
It seems that either of these (a or b) works (With an exactly identical following)
hnishy: Panda Sensei says a is the only move to win. Against White b, Black c, White d and Black e leads to ko.
Reverts to the previous diagram
Some fail paths
Fail 1 - A more "relaxed" approach
The need for an extra move against the eye here loses the semeai
Fail 2
W seems to live easily like this
Fail 4
B will get either a or b here and it's either lack of liberties for W or a big eye and a lost semeai
After B hasn't got enough liberties to fight
If W takes a or b B will take c (Obviously W can't take c else B will take d)
Fail 5
I'll either expand on it later or hopefully somebody else will? ;)
Fail 6
Reverts to the solution like this