: ( 648fo)
Black immediately captures White's two stones in the lower left, but this is too greedy.

:
White prevents Black's kikashi in the hanezeki.

Neither side will touch the hanezeki any further before White's decision point.

: (A 648ft)
Black forces at the top.

He will decrease his score in the Capture Variation, if he gives atari in the hanezeki at , instead.

: (B 648fu)
White answers locally.

She will decrease her score in the Capture Variation, if she plays her kikashi in the hanezeki at , instead, which is absolute sente at this moment.

: (A 648fv)
Black is able to play KataGo's solid connection in the centre.

Even now, after he reduced White's territory at the top with his previous kikashi, he does not really want to play the atari in the hanezeki.

:
White simplifies the issue by connecting her single stone at the top.

She might wait to do so until after her decision point, and continue with the Main Semeai, but this will not change the final scores.

Black plays 0/1 reduction.

Capture Variation:

Compared to the superordinate variation ...

• White's cumulated gain at the upper edge is two points.
• Black captured two White stones in the lower left, so gaining four points.

In total, Black gained two points.

White + 2 => Jigo

Semeai Variation:

Compared to the superordinate variation ...

• White's cumulated gain at the upper edge is two points.
• Black captured one White stone less in the lower left, so losing two points.
• White captured one more Black stone at the right, so gaining two points.
• White got one point of territory in the hanezeki.

In total, Black lost seven points.

Black + 4 => White + 3