: ( 64)
Black must not try too hard, as we mistakenly did earlier.

:
This move to the right pre-empts loosing a liberty.

:
White forces Black to spend another move in the corner, with . Otherwise, White could capture Black's group above.

:
White tries to escape to the left ...

:
... before taking Black's group a decisive liberty.

:
Black achieves a seki in the lower right corner. But his large group in the upper right is dead. So, White wins the game.