: ( 649ao)
White plays Dany's atekomi in the left centre.

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Black's atari prepares the way to Dany's Ko.

Black does not have any chance to win Dany's Ko, so he might consider simplifying the issue by connecting at , instead.

However, not fighting the ko will cost Black one point in the Semeai Variation, as has been shown in an earlier subvariation above ( 649ah).

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The ko fight begins.

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White utilises this atari in the left centre as a ko threat.

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Black has to connect his two stones.

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White connects her single stone at the upper edge, taking profit outside the Main Semeai area.

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Black does not have a chance to win the ko fight in the left centre, so he secures his territory in the right centre.

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White has to connect the ko - sooner or later.

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The Main Semeai continues.

Black plays 2/3 reductions.

If he played a third one, e.g. the , exchange, the scores of the Main Variations would be interchanged.

Before the end of the game, Black must capture at .

Capture Variation:

Compared to the superordinate variation ...

• Black did not capture White's stone at the upper edge, so losing two points.
• White got an additional two points of territory at the upper edge.
• White did not get any territory in the left centre, so losing two points.
• Black got an additional point of territory in the right centre.

In total, gains and losses compensate for each other.

White + 2 => White + 2

Semeai Variation:

Compared to the superordinate variation ...

• Black did not capture White's stone at the upper edge, so losing two points.
• White got an additional two points of territory at the upper edge.
• White did not get any territory in the left centre, so losing two points.
• White captured an additional Black stone in the right centre, but lost two points of territory there, so the net effect is zero.

In total, White gained one point.

Jigo => White +1