: ( 152)
Black may play this cut, but he will not benefit from doing so.

:
White fills-in her false eyes, in order to shorten the sequence.

:
White starts the ko, her centre group has five effective liberties left.

:
Black's group is below the Punishment Semeai Liberty Level, so he has no other choice but to play the atari in the hanezeki as a ko-threat.

:
Black has no valid ko-threat left, so he must connect the hanezeki's tail.

:
Black recaptures the ko at a moment, when White's centre group still has five liberties. As "usual" with this condition, he will lose the semeai with his connected group on the lower edge. His initial kikashi at has proven to be a decisive mistake.