: ( 98)
With this move, Black pre-empts three White ko-threats in this area.

:
White starts the ko immediately.

:
Black is hindered to connect the hanezeki's tail with a move at , instead, because White's centre group has five liberties left.

Ko:

:
Black's atari of on the upper edge is no valid ko-threat here, because White's centre group has four liberties left.

Capturing two White stones with a move at , instead, is no valid ko-threat either, because White's group has more than two liberties left.

Black simply lost a tempo by his initial protective move ().

:
In the end, Black is one move too late.