: ( 222nq)
Black descends to the upper edge.

:
White continues with the Main Semeai.

:
In order to simplify the presentation, we will occupy White's upper liberties first.

:
White gives atari at Black's stones above.

:
White establishes some points of territory in the centre.

:
White's previous move lost one tempo in the Main Semeai, so Black is able to push at the upper edge.

Black must not play any reduction.

Capture Variation:

Compared to the superordinate variation ...

• Black got an additional two points of territory in the upper left corner.
• Black destroyed one point of White's territory at the upper edge.
• White destroyed one point of Black's territory in the left centre.
• White got an additional two points of territory there.

In total, gains and losses compensate for each other.

White + 3 => White + 3

Semeai Variation:

Compared to the superordinate variation ...

• Black got an additional two points of territory in the upper left corner.
• Black destroyed one point of White's territory at the upper edge.
• White destroyed one point of Black's territory in the left centre.
• White got an additional two points of territory there.

In total, gains and losses compensate for each other.

Black + 1 => Black + 1