: ( 648cx)
White's connection of Dany's Ko comes too early.

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Black's push at the top is no absolute sente.

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White plays her own forcing moves in the lower left corner, threatening to kill Black's group at the left.

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Thereafter, White answers at the top.

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Black captures White's single stone at the top, which is decisive here.

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White blocks.

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Black is able to connect.

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The Main Semeai continues.

Black plays 2/2 reductions.

Capture Variation:

Compared to the superordinate variation ...

• Black reduced White's territory at the top by one point.
• Black did not destroy one point of White's territory in the upper right corner.

In total, gains and losses compensate for each other.

White + 1 => White + 1

Semeai Variation:

Compared to the superordinate variation ...

• Black reduced White's territory at the top by one point.
• White captured one Black stone less in the upper right corner, so losing one point.

In total, White lost two points.

White + 1 => Black + 1