: ( 648nx)
Black connects at the left edge, erasing the potential shortage of liberties in the centre.

Ko:

:
White reduces Black's territory in the corner to only one eye.

:
Therefore, Black is forced to continue with the ko fight, but which he will be unable to win.

Ko: ; ; ; ;

:
This atari in the centre is a desperate measure.

:
White captures the hanezeki's tail.

:
Black must recapture, as usual with the dissolving of the hanezeki.

:
White connects the ko, simultaneously killing Black's entire left side.

White will win by a large margin.