: ( 2025)
White attaches inside Black's formation in the upper left.

KataGo's tesuji creates a severe shortage of liberties for Black's stones to the left.
Assuming White's kikashi of , , Black's connected stones have only two liberties left, and so cannot escape capture.

During our earlier analyses we had not recognised this tesuji (as well as Fujisawa Hideyuki) and so missed an additional point for White.
White's victory was consequently one point smaller at that time.

For further details, please refer to section "Joachim's Rediscovered Oki in the Hanezeki" ( 2042).

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Black if forced to connect above White's just played stone.

This is the only move that successfully immobilises White's intruder, not only erasing the above mentioned potential damezumari, but also White's single stone's hopes for escape.

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Cheng's bump in the left centre.

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White simplifies the issue here through erasing her weakness in the Guzumi Area.

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Black gains territorially at the top in return.

You will easily recognise that we have reached a position that enables us the evaluation of the scenario, wherein White started the endgame at the left side of the board "late" after the dissolving of the hanezeki, as Fujisawa Hideyuki did in his classical solution.

Black must not play any reduction.

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This is the position at White's decision point.

There are three valuable spots remaining on the board, , and , of which White will get two.

White starts with .
Black simplifies the issue by connecting at , as he will be unable to win the ko-fight after , , , , .
White takes the last valuable point of .

White gained one point through her kikashi , in the left centre.

Capture Variation:

Compared to the superordinate variation, ...

• Black got an additional two points of territory in the upper left corner.
• Black destroyed one point of White's territory at the top.
• White got an additional three points of territory in the Guzumi Atara.
• In the left centre, Black captured an additional White stone, but lost one point of territory, so the net effect is zero.

In total, gains and losses compensate for each other.

White + 2=> White + 2

Semeai Variation:

Compared to the superordinate variation, ...

• Black got an additional two points of territory in the upper left corner.
• Black destroyed one point of White's territory at the top.
• White got an additional three points of territory in the Guzumi Atara.
• In the left centre, Black captured an additional White stone, but lost one point of territory, so the net effect is zero.
• White captured two Black stones less in the upper right, so losing four points.
• White got an additional point of territory in the hanezeki.

In total, White lost three points.

White + 1 => Black + 2

2025