: ( 648kx)
Black occupies another liberty of White's left-hand group.

:
White captures Black's stone in sente.

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Black is forced to connect.

: (149 648mb)
White continues with the Main Semeai.

It would be a mistake to connect the ko in the left centre.

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Black recaptures the ko.

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White must not connect the ko, so it does not make sense to continue with the ko fight.

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Black has to connect the ko.

Black must not play any reduction.

Capture Variation:

Compared to the superordinate variation, there are no changes.

Black + 1 => Black + 1

Semeai Variation:

Compared to the superordinate variation, there are no changes.

White + 1 => White + 1