: ( 222co)
White descends to the upper edge.

: ( 132 222cs)
Black gives atari in the upper left corner, so gaining an advantage in the ko fight to come.
However, Black's move lost a dicisive liberty in the Centreal Semeai.

Black should have established a three-point eye for his right-hand group by connecting at . He would achieve a much better result than here.

:
White starts the Central Semeai.

:
Black must connect the hanezeki's tail.

:
White captures at the upper edge.

Black is unable to give atari at in the centre.
If he played a viable ko threat, and recaptured at thereafter, White would capture at , and Black would be helpless again.
If Black connected at , White would also connect at . Thereafter, she would continue with in the lower right, in order to take Black's connected bottom group off the board.

White will win the game by a very large margin.