Shortage of liberties prevents White from playing at
. Thus White is left with a false eye.
Black does not play at
for a peep because White would play at
and live. (
and
are miai for the second eye.)
captures one stone, but
leaves White dead. The points a and b are miai, meaning that the eye is false.
is part of the solution, but if
is played as shown in this diagram, we end up with a ko instead of an unconditional kill?.