: ( 128a)
Black gives atari in the corner.

:
White does not connect the atari, but cuts Black's corner group into two.

:
After this jump into the corner, it will be difficult for Black to kill White's stones.

:
Black establishes a ko shape in the corner.

:
White utilises the shortage of liberties of Black's left-hand group.

:
Black is unable to give atari at , and so has to continue his attack from above.

Giving atari with is useless, because White establishes a double-ko in the corner by capturing with .

:
White's group in the corner is alive, due to the double-ko at the left edge.

:
White also kills Black's group at the upper edge.

White will win the game by a large margin.