(Referenced by 649ap)

: ( 649ao)
Black plays KataGo's solid connection in the left centre.

:
White throws-in in the lower left corner, so creating an additional approach-move liberty for her large group on the left.

:
Black captures White's single stone at the upper edge.

:
White continues with the Main Semeai.

:
Black is par with the Punishment Semeai Liberty Level, so he is bound to follow White with the Main Semeai.

; :
White could also play these moves after her decision point.

Black must not play any reduction.

Capture Variation:

Compared to the superordinate variation ...

• White got an additional point of territory at the upper edge.
• Black's cumulated gain in the left centre is three points.
• White captured Black's stone in the lower right, so gaining two points.

In total, gains and losses compensate for each other.

White + 2 => White + 2

Semeai Variation:

Compared to the superordinate variation ...

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

In total, Black gained four points.

Jigo => Black + 4