: ( 58bz)
Black connects above.

:
White separates Black's forces at the left.

:
Black must provide his centre group with a second eye.

:
White attacks Black's corner group in return.

:
White reduces Black's eye space decicively.

:
Black can barely reach a seki, in gote.

:
The Main Semeai continues.

Black plays 4/4 reductions.

Capture Variation:

Compared to the superordinate variation, ...

• Black got an additional two points of territory in the left centre.
• Black destroyed two points of White's territory in the upper right.
• White destroyed nine points of Black's territory in the lower left corner.

In total, Black lost five points

White + 2 => White + 7

Semeai Variation:

Compared to the superordinate variation, ...

• Black got an additional two points of territory in the left centre.
• Black captured one White stone less in the left centre, so losing two points.
• Black captured two White stones less in the upper right, so losing two points.
• The net effect of the different play in the lower left corner is zero.

In total, Black lost two points.

White + 2 => White + 4