: ( 538)
Black's sagari at , chosen by Cheng, is not correct, in our opinion.
White occupies further liberties, ...
:
... and Black cannot connect at following White's atari of , due to his cutting point at .
:
Black might live in the top left corner, in sente, hoping to win the following semeai with White's group on the upper edge. But he will have to painfully realise that his own group has just one liberty to few.
(C) 
538
:
following White's atari of 
.
:
:
