( 548kl):
White's connection at the upper edge comes too early. She has to play in the centre first.

:
Black connects solidly in the centre.

:
White now answers Black's move in the upper left.

:
The Main Semeai continues.

, :
Black is able to destroy three points of potential White territory at the right.

Capture Variation:

Compared to the superordinate variation, ...

• Black's cumulated gain in the lower left is two points (three points of territory minus one prisoner).
• White's cumulated gain at the top left is three points.
• At the top right, Black did not destroy one point of White territory.
• In the centre, Black got one point of territory.
• Also in the centre, White did not get two points of territory.

In total, White lost one point by her connection.

White + 1 => Jigo

Semeai Variation:

Compared to the superordinate variation, ...

• Black's cumulated gain in the lower left is two points (three points of territory minus one prisoner).
• White's cumulated gain at the top left is three points.
• At the top right, White captured one Black stone less, so losing one point.
• In the left centre, White did not get two points of territory.
• Black got one point of territory there.
• Black captured one White stone less in the lower left corner, so losing two points.

In total, White lost one point by her connection.

White + 1 => Jigo