(Referenced by 648qc)

: ( 648qa)
White pushes from above, threatening to connect her single stone below.

:
Black is able to connect Dany's Ko.

:
White forces from above.

Playing at , instead, would be a grave mistake. Black would be forced to connect with , and win both Main Variations by one point.
Please refer to the alternative subvariation for details.

:
Black is forced to connect.

:
Black plays 1/1 reduction.

: ( 185 648qu)
White blocks immediately at the upper edge.

However, KataGo found a better move for her. White must destroy one point of Black's territory in the lower left in return.

Capture Variation:

Compared to the superordinate variation ...

• Black got an additional point of territory in the left centre.
• Black captured an additional White stone in that area, so gaining one point.
• Black's cumulated gain in the lower left corner is one point.
• Black did not capture one White stone in the upper right, so losing two points.

In total, White lost one point.

White + 2 => White + 1

Semeai Variation:

Compared to the superordinate variation ...

• Black got an additional point of territory in the left centre.
• Black captured an additional White stone in that area, so gaining one point.
• Black's cumulated gain in the lower left corner is one point.
• The cumulated effect in the upper right is zero points.

In total, White lost three points.

White + 2 => Black + 1