: ( 548k)
White secures two points of territory in the centre.

:
Black captures White's single stone at the upper edge.

: (140 548kna)
White gives atari at the upper edge.

She can also do without this block, and still get the same final score of the game (with the Capture Variation). The Semeai Variation, however, will end worse for her.

:
Black connects, without affecting the final score.

:
White continues with the Main Semeai, which will follow the course of the superordinated variation.

Both Main Variations:

Compared to the superordinate variation, ...

• Black captured one White stone at the upper edge, for a gain of one point.
• White lost one point of territory at the upper edge.
• White got two points of territory in the centre.

In total, gains and losses compensate for each other.

White + 1 => White + 1