: ( 2035)
KataGo follows Joachim's suggestion of playing this hane "early".

For further details of our analysis at the time, please refer to the history of our investigations ...
532

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Black has to cut.

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White's hane at the left edge is decisive for creating a shortage of liberties on Black's side.

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Black connects at the left edge here.

Connecting at , instead, will not make a difference.

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White throws-in for the first time.

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White throws-in for the second time.

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Black captures White's lower stone.

If he captured in the corner with , instead, White would live without any ko after the sequence of , , , as Black would be unable to connect with .

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White gives atari in the corner.

Capturing Black's two stones would secure independent life for White's group in the corner.

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Thus, Black has to capture White's upper stone at the left edge, too.

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Joachim captures into the lower ko.

This move establishes Joachim's Double-Ko (there are two ko-shapes now, at , and at ), which renders Black's attempt to capture White's left side with a grave mistake.

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Sooner or later, Black will (have to) play a protective move at the upper edge.

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White connects the lower ko.

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Black cuts aggressively, but ...

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... he is unable to reduce White's centre group to only one eye.

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White's double-atari secures life for her group in the upper left.

Black is unable to connect at , as White would capture with .

Please note that White will not capture the hanezeki's tail with a move at .

All of Black's groups on the right side of the board are dead, so ...

White will win the game by a very large margin.

2035