: ( 40)
White may try a move at here.

The sub-variations here were provided to us by Michael Redmond 9p, who was so very kind to adjust our earlier ideas.

: (A 65)
Black should concentrate on the fight with White's group in the corner. If he tries too hard attacking White's upper group, instead, he will end in disaster.

: (8 66)
White may try a move at 8, instead, which will lead to a similar result.

:
Black starts a ko with this move.

:
We are in the opening stage of this problem, and White does not have any relevant ko-threat. So, she has no choice but to connect the ko.

:
All of Black's group on the board live, but White's group in the lower right corner is dead. So, Black wins the game.