unkx80: I think should be at .
ThorAvaTahr: I have my doubts about the sequence above;
ThorAvaTahr: nothing works for white here...
I would be wonderful if we could convince black to play at the marked point
Herman: Yes, this is the same objection that unkx80 posted above :-) As i answered there, in the end it probably ends up something like my diagram labeled "escape".
ThorAvaTahr: Ok, but be careful, the next diagrams give black sufficient time to reinforce the thin side
ThorAvaTahr: So perhaps the clue of this problem is to play a at the correct timing.
ThorAvaTahr: This is an attempt at the correct order of moves. White would live due to sufficient outside liberties.
Herman: Black is probably better off allowing white to escape. The diagram I posted above leads to ko, but black may also consider something like the following: