: ( 648oz)
White connects at the upper edge, so losing another move in the Main Semeai.

:
Black continues with occupying White's liberties at the left.

Black plays 3/3 reductions.

Black must capture at before approaching White's group in the lower left corner.

Capture Variation:

Compared to the superordinate variation ...

• Black destroyed one point of White's territory in the upper right corner.

In total, White lost one point.

White + 1 => Jigo

Semeai Variation:

Compared to the superordinate variation ...

• White captured an additional Black stone in the upper right, so gaining one point.

In total, White gained one point.

Black + 1 => Jigo