: ( 648hm)
White blocks at the top.

:
Black captures White's single stone at the top.

:
White secures two points of territory in the centre, and lets Black destroy another point of her territory at the top.

:
Black must connect.

:
White has to throw-in "early".

Otherwise, Black would connect, gaining one point overall.

Black plays 3/5 reductions.

Please assume the rejection of Dany's Sacrifice (, ) played before.

Before her decision point, White will force with and in the left centre.
This implies that Black will have to capture at before the end of the game in the Capture Variation.

At White's decision point, Black's large group in the upper right will have nine liberties, eight direct ones (), and one approach-move liberty ().
White on her side will suffer from the final ko in the upper right centre - found by Joachim ( 648ag) - that depends on the existence of two White cutting points in the centre (), and Black's ko threat at at the left centre.
Black's large group in the upper right will not survive the semeai, but Black will capture White's two wC-stones.

Capture Variation:

Compared to the superordinate variation ...

• Black's cumulated gain at the upper edge is three points.
• White got an additional point of territory at the top.
• White got two points of additional territory in the left centre.

In total, gains and losses compensate for each other.

White + 2 => White + 2

Semeai Variation:

Compared to the superordinate variation ...

• Black's cumulated gain at the upper edge is three points.
• White got an additional point of territory at the top.
• Black captured an additional two White stones in the left centre, so gaining four points.
• Black does not need to capture White's two stones in the lower left corner, so gaining one point.

In total, White lost seven points.

White + 2 => Black + 5