: ( 648co)
Black plays KataGo's solid connection.

:
White continues with the Main Semeai.

It might be tempting to block at , instead, but this move would be one point worse for her overall.

:
Black plays the push at the top.

:
Black plays the atari at White's two stones in the lower left.

He is already at par with the Punishment Semeai Liberty Level. Therefore, he does neither have any chance to capture White's stone at the upper edge with , nor to play the atari at in the hanezeki.

Neither is Black able to play the push at the top; please refer to ( 648ap) for details.

:
White chooses Dany's Sacrifice.

Black must not play any reduction.

White will connect at after her decision point, and Black will play his kikashi , at the top thereafter.

White will start the Semeai Variation with her kikashi , in the hanezeki.

Capture Variation:

Compared to the superordinate variation ...

• White's cumulated gain at the upper edge is three points.
• In the left centre, Black got one point of territory, while White did not get two points, so his cumulated gain is three points.

In total, gains and losses compensate for each other.

Black + 2 => Black + 2

Semeai Variation:

Compared to the superordinate variation ...

• White's cumulated gain at the upper edge is three points.
• In the left centre, Black got one point of territory, while White did not get two points, so his cumulated gain is three points.

In total, gains and losses compensate for each other.

White + 3 => White + 3