: ( 648bi)
Black connects below.

:
White stops Black from creating additional territory in the left centre.

:
White connects her single stone at the top.

:
White chooses Dany's Sacrifice, and continues with the Main Semeai.

She must not connect at , instead.
If she did, she would gain four points in the Capture Variation, but lose two Main Semeai Liberties. Black would have eleven Main Semeai Liberties at White's decision point, so she would be unable to capture his large group in the upper right in the Semeai Variation.
White would achieve a drawn game in the Capture Variation (Black would play 1/4 reductions), but which would be three points worse overall.

Black plays 0/2 reductions.

Capture Variation:

Compared to the superordinate variation ...

• Black got one point of territory less in the left centre.

White gained one point.

Black + 4 => Black + 3

Semeai Variation:

Compared to the superordinate variation ...

• Black got one point of territory less in the left centre.

White gained one point.

White + 2 => White + 3