SnotNose: seems to do the job.
is the trickiest reply I could find. Black has no good answer to
.
is a key move. If
at
then Black can play at
to get a seki.
DomQ: I thought that Black 2 was a successful defense for Black after White 1. This is not the case.
unkx80: The descent at is the way to kill, much like in Beginner Exercise 72 and Beginner Exercise 76. After that, we can say that a and b are miai.
If , then
to
kills.
If White (improperly) tries to kill off the (false) vital point (was Black 2 in the above sequence), here is the correct answer for Black.
unkx80: Black should play at here. Since capturing at a gives Black one solid eye, White can do no better than to turn the corner into a seki, that is, Black is already alive.