:
White does not have any ko threats against Black's top left corner, so she has to start the ko fight "early", to exhaust Black's ko threats.
:
The time is ripe to connect the hanezeki's tail.
Ko: ; ;
...
:
White erases Black's last essential ko threat (the atari at ).
:
White's final ko capture leaves Black helpless, as there is no Black ko threat left. After any Black move, White will connect the ko.
Black is unable to give atari at , while – in principle – White could take Black's connected tail group off the board, starting with a move at .