: ( 648aa)
White plays Dany's atekomi.

We will use this subvariation especially to show that is does not hurt White to save playing her atari in the upper left corner for later.

Please note that White's atekomi is played outside the Main Semeai area and does not create an approach-move liberty at lB for her left-hand group.
Without the exchange of for played before, Black's marked stones now have an additional liberty at lC. This implies that White's move lost one tempo in the Main Semeai - for the time being.

Please also note that White's atari at cannot be used as an additional ko threat - quite contrary to our long-standing belief.
This atari will be compensated for by Black's atari at White's two stones in the lower left.

: ( A 648kw)
Black is able to give this atari in the left centre immediately, without having played his kikashi in the lower left corner beforehand.

It is not necessary to give atari at White's two stones in the lower left prior to initiating Dany's Ko. However, we will use this subvariation to explain a different result of Dany's Sacrifice, compared to another important line.

: (B 648mf)
White accepts the challenge, and completes the shape for Dany's Ko.

Alternatively, she might consider playing the upper atari at .

:
Black starts the ko fight.

:
White uses her atari in the upper left as a ko threat.

:
Black connects.

Please note that has become an approach-move liberty of White's left-hand group, so Black lost one tempo in the Main Semeai by his connection.

:
Black has to connect his two stones at the left - sooner or later - in order to erase his shortage of liberties in that area.

:
White inserts her kikashi in the lower left corner, threatening to kill Black's entire group.

:
White's connection at the upper edge is the largest point now.

White is barely - but also securely - ahead in ko threats (9 x vs. 8 x ), so it does not make much sense for Black to continue with the ko fight in the left centre.

; ; :
Therefore, Black plays his remaining kikashi ...

:
... before continuing with the Main Semeai.

:
White has to connect the ko - sooner or later.

Black plays 3/4 reductions.

Later, White will play her kikashi , in the lower left corner, so Black must capture at before the end of the game.

Capture Variation:

Compared to the superordinate variation ...

• White's cumulated gain at the upper edge is two points.
• Black did not get any territory in the left centre, so losing one point.
• Black destroyed one point of White's territory in the upper right corner.
• White did not capture Black's stone in the lower right, so losing two points.

In total, gains and losses compensate for each other.

White + 2 => White + 2

Semeai Variation:

Compared to the superordinate variation ...

• White's cumulated gain at the upper edge is two points.
• Black did not get any territory in the left centre, so losing one point.
• White captured an additional Black stone in the upper right corner, so gaining one point.
• White captured an additional Black stone in the lower right, so gaining two points.

In total, White gained six points.

Black + 4 => White + 2