If Black can play a ko with , White gets a disaster as a result. Otherwise, Black can play at a and still get a much better result than in the correct line of play.
All other moves than lose territory.
rubilia: Are you sure black cannot live in the corner? If she could, there should be better moves than to
. Do you leave this question open by purpose? I suppose a white stone somewhere in the corner (at b17 for instance) would make the problem a clearer "monkey jump" one.
-- GoJaC, 23kyu
Black can start a flower viewing ko at , so your sequence is not recommended. --unkx80
Thanks! -- GoJaC