: ( 648gf)
White continues with the Main Semeai, choosing Dany's Sacrifice in the lower left.

:
Black captures White's two stones in the lower left.

:
The Main Semeai continues.

Black must not play any reduction.

Capture Variation:

Compared to the superordinate variation ...

• Black captured two White stones in the lower left, so gaining four points.
• White captured Black's stone in the lower right, so gaining two points.

In total, White lost two points.
This is the core effect of Dany's Sacrifice in the Capture Variation.

White + 2 => Jigo

Semeai Variation:

Compared to the superordinate variation ...

• Black captured one White stone less at the left, so losing two points.
• White captured one Black stone less at the right, so losing two points.

In total, gains and losses compensate for each other.
This is the core effect of Dany's Sacrifice in the Semeai Variation.

Black + 4 => Black + 4