: ( 58bi)
White pushes at the left edge.

:
Black blocks immediately.

:
White's hane at the upper edge is sente.

:
Black must protect his upper left corner.

:
White continues with the central attachment in the left centre.

:
The Main Semeai continues.

Black plays 2/2 reductions.

Capture Variation:

Compared to the superordinate variation, ...

• White's cumulated gain in the upper left corner is two points.
• White's cumulated gain at the upper edge is two points.
• White did not captue a Black stone in the left centre, so losing two points.
• White did not capture Black's stone in the lower right, so losing two points.

In total, gains and losses compensate for each other.

White + 1 => White + 1

Semeai Variation:

Compared to the superordinate variation, ...

• White's cumulated gain in the upper left corner is two points.
• White's cumulated gain at the upper edge is two points.
• White did not captue a Black stone in the left centre, so losing two points.
• Black captured one White stone more at the left edge, so gaining two points.
• White captured one Black stone in the lower right, so gaining two points.

In total, White gained two points.

Black + 5 => Black + 3