: ( 222eq)
White plays Yamada Shinji's tsuke in the upper left corner.

: ( 104 222es)
We follow Yamada Shinji's original line of play first.

As we know now, KataGo's crosscut at would be preferable.

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Black defends his corner by descending to the upper edge.

Playing the original push at , instead, would suffer from some hidden, and unexpected, weaknesses in his corner.

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White forces once.

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Black must defend from the inside.

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Here, it is best for Black to connect.

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White gives atari at the top first.

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Thereafter, she connects her two stones in the lower left.

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White lost two tempi in the Main Semeai by her connection in the lower left, so Black is able to play this push at the top in sente.

Black plays 2/2 reductions.

Capture Variation:

Compared to the superordinate variation ...

• White's cumulated gain in the upper left and the top is four points.
• White did not capture Black's stone in the lower left, so losing two points.

In total, White gained two points.

Jigo => White + 2

Semeai Variation:

Compared to the superordinate variation ...

• White's cumulated gain in the upper left and the top is four points.
• White did not capture Black's stone in the lower left, so losing two points.

In total, White gained two points.

Black + 5 => Black + 3