( 648az)
Black gives atari in the hanezeki.

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But he ends in gote, losing one decisive tempo in the Main Semeai.

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White's wedge in the left centre is her strongest move.

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Capturing White's single stone at the upper edge is best for Black.

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White gives atari in the centre, creating some points of territory thereafter.

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Black gives atari at the upper edge.

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Black is able to connect.

Black plays 0/1 reduction.

Capture Variation:

Compared to the superordinate variation ...

• Black's cumulated gain at the upper edge is three points.
• Black did not get any territory in the left centre, so losing two points.
• White got an additional two points of territory there.

In total, Black lost one point.

Black + 2 => Black + 1

Semeai Variation:

Compared to the superordinate variation ...

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

In total, Black lost one point.

White + 2 => White + 3