: ( 648db)
White recaptures the ko in the left centre.

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Black captures White's two stones in the lower left, also erasing his shortage of liberties (after , , ) above.

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White does not intend to continue with the Nakade Sequence, and so connects her single stone at the upper edge.

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Black's push at the top is absolute sente.

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White has to block immediately.

It is too late now to connect with at the left edge, instead.

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Black throws-in.

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White has to play her kikashi in the hanezeki.

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The mutual occupation of opponent's liberties starts.

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White concentrates on the Semeai Variation. Therefore, it does not make sense to prevent the capture of her stones at the left just now.

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White recaptures at the left edge.

...

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It does not make sense for White to fight the ko at the left edge. She will not benefit from doing so.

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Black captures the ko in the centre.

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Again, it is useless for White to fight this ko, as she will be unable to connect it.

Otherwise, Black would win the Semeai Variation by a large margin, too. His large group at the right would survive the semeai.

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Black connects the ko.

Black plays 0/1 reduction.

((Capture Variation:))

Compared to the superordinate variation ...

• White did not capture Black's five-stone nakade, so losing five points.
• Black's cumulated gain at the lower left edge is three points.

In total, White lost eight points.

Black + 4 => Black + 12

Semeai Variation:

Compared to the superordinate variation ...

• White did not capture Black's five-stone nakade, so losing five points.
• White's cumulated gain at the lower left edge is five points.

In total, gains and losses compensate for each other.

White + 2 => White + 2