: ( 649aj)
KataGo captured the nakade a few moves earlier in the super²ordinate variation before initiating Dany's Ko.

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KataGo also played this atari in the nakade "early".

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The ko fight starts; we have completed the change in the order of moves.

Ko: ; ;

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White plays this ko threat in the upper left corner even though she will be unable to win the ko in the right centre.

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Black uses the push into White's upper right corner as a ko threat.

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It seems that KataGo now has realised that White cannot win the ko fight. As Joachim had already found out, this move in the bamboo joint is not a valid ko threat.

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Several forcing moves of both sides follow.

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Eventually, Black connects the ko.

Black plays 4/4 reductions.

Capture Variation:

Compared to the superordinate variation ...

• Black got an additional point of territory in the left centre.
• White did not capture one Black stone there, so losing one point.
• Black got an additional point of territory in the lower left corner.
• White destroyed one point of Black's territory in the upper left corner.
• Black destroyed two points of White's territory in the upper right.
• Black did not capture White's single stone in the right centre, so losing three 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.
• White did not capture one Black stone there, so losing one point.
• Black got an additional point of territory in the lower left corner.
• Black captured an additional White stone in the upper left, so gaining two points.
• White captured an additional Black stone in the upper right for a net gain of zero points.
• White got an additional point of territory there.

In total, White lost three points.

White + 1 => Black +2