: ( 58by)
Black descends to the upper edge, blocking his corner.

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White returns to the reduction of Black's lower left corner.

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Both sides follow a well-known path.

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White plays KataGo's bad-shape move in the left corner.

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Black gives atari at White's two stones in the lower left.

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White connects immediately, keeping the matter simple.

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Black is now able to push into White's territory at the top.

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Black captures White's single stone at the upper edge.

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White gives atari immediately, again keeping the matter simple.

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White connects her single stone in the upper right.

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Black returns to the left centre, playing KataGo's solid connection there.

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The Main Semeai continues.

Black plays 1/1 reduction.

Capture Variation:

Compared to the superordinate variation, ...

• Black's cumulated gain in the upper left corner is seven points.
• Black destroyed two points of White's territory at the top.
• White's cumulated gain in the lower left corner is three points.
• White got an additional point of territory in the right centre.
• Black did not capture White's two stones in the lower left, so losing four points.
• White captured Black's stone in the lower right, so gaining two points.
• Black destroyed one point of White's territory in the upper right corner.

In total, Black lost one point.

White + 1 => White + 2

Semeai Variation:

Compared to the superordinate variation, ...

• Black's cumulated gain in the upper left corner is seven points.
• Black destroyed two points of White's territory at the top.
• White's cumulated gain in the lower left corner is three points.
• White got an additional point of territory in the right centre.
• Black captured one White stone less at the left, so losing two points.
• White captured one Black stone less in the lower right, so losing two points.
• White got an additional point of territory in the upper right corner.

In total, Black lost three points.

Black + 7 => Black + 4