: ( 416)
This move, securing life for White's group on the left edge, is the only one that allows Black not more than two ko-threats in this area. Further details of our investigation on this subject can be found later ( 841).

:
Black cuts inside White's eye, exploiting her shortage of liberties in this area.

:
This is White's strongest response, in our opinion.

Ko: ; ; ; ; ;

:
White starts the ko "early".

Ko: ; ;

:
Black has got an additional ko-threat on the upper edge.

: (A 419)
Black has run out of ko-threats, so he is forced to connect the hanezeki's tail.

:
White is one move ahead in the semeai with Black's group on the lower edge, and so wins the game.