Let's go back a few years again and enter the world of amateurs ...

Referenced by ( 2022MainLine)

: ( 2039)
Black occupies White's liberty in the left centre.

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Cheng's bump in the left centre.

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Black's atari at White's two stones in the lower left is a counter-kikashi.

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White connects her two stones.

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Black answers in the left centre.

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White connects her single stone in the right centre, preventing Black from capturing it.

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Black plays KataGo's Solid Connection, so simplifying the further course of the game.

If he captured White's single stone at the upper edge with , instead, White would attach at in the left centre, followed by and .
Thereafter, Black must be careful not to fall into a sudden trap, as he needed an additional move at in order to turn his potential eye in the left centre into a real one.

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White takes the opportunity to connect her single stone at the upper edge.

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The Main Semeai continues.

Black plays 3/3 reductions.

Capture Variation:

Compared to the superordinate variation, ...

• White's cumulated gain at the upper edge is two points.
• Black did not destroy one point of White's territory in the upper right corner.
• Black destroyed one point of White's territory in the right centre.
• White did not capture Black's single stone in the lower right, so losing two points.

In total, gains and losses compensate for each other.

White + 2 => White + 2

Semeai Variation:

Compared to the superordinate variation, ...

• White's cumulated gain at the upper edge is two points.
• Black destroyed one point of White's territory in the upper right corner.
• White captured one Black stone less in this area, so losing one point.
• Black destroyed one point of White's territory in the right centre.
• White captured an additional two Black stones at the right, so gaining four points.

In total, Black lost three points.

Black + 4 => Black + 1

2039