:
Black connects.

As the main variation here, we will display KataGo's favoured solution to the problem, i.e. the sequence of moves with the highest win rates in KataGo's "Analysis Mode".

:
White extends downwards in the corner.

Alternative option (with a slightly less winrate) is the jump to , threatening to break through to her centre group. It will result a change in the order of moves (= "CHITOOM").

:
Black connects.

Alternative option (CHITOOM) is the atari at .

:
White jumps to the left.

:
As a matter of course, Black blocks.

Alternative options (CHITOOM) are , , and .

:
White pushes to the left.

Alternative option (CHITOOM) is .

:
Black keeps White separated.

Alternative option (CHITOOM) is .

:
White descends downwards.

Alternative option (CHITOOM) is .

:
KataGo likes to insert this push "early".

Alternative options (CHITOOM) are and .

:
White must stop Black from cutting through.

:
Black completes the fence.

Alternative options (CHITOOM) are and .

:
White cuts below.

Alternative option (CHITOOM) is .

:
KataGo likes to play this kikashi "early" that again threatens to cut through.

Alternative options (CHITOOM) are and .

:
White has to capture.

:
Black connects his stone in atari.

Alternative option (CHITOOM) is .

:
White cuts in the corner.

:
Black has to keep White separated.

:
White has to connect, as Black's move was an atari.

:
KataGo likes to play this kikashi "early".

Please note that Black loses a potential ko-threat here.
But on the other hand, he also prevents White from utilising a move at as a ko-threat later (or as a means for gaining one point in the Semeai Variation).

Alternative option (CHITOOM) is .

:
White has to connect.

:
Black plays the other throw-in for spoiling White's shape.

Please note that we played this kikashi before the throw-in above in Our Solution.

:
White captures, of course.

:
KataGo likes to play this atari "early".

Please note that this move loses another potential ko-threat for Black.

:
White connects.

:
Black has to stop White from getting an eye.

:
White connects.

:
This move starts the partial sequence in the corner that results in creating the hanezeki's tail.

:
White has to play this kikashi in the corner first before answering Black's atari.

:
The hanezeki's tail is born.

:
Due to the special shape of the outer compound of the hanezeki, Black has to add a stone to his previous "hane", to give the tail a minimum length of two stones.

:
White prevents the capture of her three stones.

:
KataGo likes to insert this push and Harry's hasami-tsuke in the upper right corner "early".

Alternative options (CHITOOM) are and .

: (40 58ab)
White blocks directly.

Alternative option is the jump to the second line with .

:
This is Harry's hasami-tsukie.

:
White prevents Black from capturing her single stone.

:
Black connects along the upper edge.

Alternative option (CHITOOM) is .

:
White protects her cutting point.

:
Black continues with lengthening the hanezeki's tail.

:
White defends her four stones above.

:
The hanezeki's tail consists of four stones now.

:
White has to keep the tail down to only two liberties.

: (49 58ah)
Black continues with lengthening the tail.

Alternative option is playing the guzumi early with .
Thereafter, (CHITOOM) is favoured by KataGo, but a move at is also considered, resulting in a completely different game that eventually will also end with a White win by two points.

:
KataGo plays the peep at the bottom "early", also strengthening Black's lower left corner.

Alternative option (CHITOOM) is .

:
KataGo plays the Guzumi Exchange "early", immediately after the peep..

Alternative option (CHITOOM) is .

:
The hanezeki's tail starts its further wanderings through the centre of the board.

...

:
KataGo likes to play this atari first.

Alternative option (CHITOOM) is .

:
Black starts the Crosscut Sequence.

:
White starts the Nakade Sequence.

:
Alternative option (CHITOOM) is .

:
Alternative option (CHITOOM) is .

:
White plays KataGo's atari.

:
Black completes the nakade.

Alternative option (CHITOOM) is .

: (100 58ai)
White captures Black's single stone in the lower left.

Alternative options (CHITOOM) are , (giving Black no chance for playing Joachim's atari at the second line) and (but which can be considered a technical mistake if unnecessarily played so early).

: (C 58ee)
KataGo likes to play the tsuke of Yamada Shinji "early", before the completition of the Nakade Sequence at the left.

Alternative options (CHITOOM) are , and (giving Black no chance for playing Joachim's atari at the second line, see the subvariation above) .

: (C 58ef)
White plays KataGo's crosscut.

Alternative options (CHITOOM) are and .

: (E 58eg)
Black plays atari from the inside.

Playing the atari at the top -- following Joachim's idea - is a mistake, if White has not yet connected her two stones in the lower left, providing Black with an additional two Main Semeai Liberties.

Played otherwise - after this connection - it would result in the same final scores as here. See this subvariation ( 58ef) for details.

:
White gives atari at the upper edge.

Alternative option (CHITOOM) is .

:
White returns to the nakade at the left.

:
Black gives atari at White's two stones in the lower left "early".

Alternative option (CHITOOM) is .

:
White is forced to connect.

Please note that White lost two tempi in the Main Semeai by this move.

:
Black protects his formation in the left centre.

Alternative option (CHITOOM) is .

The crosscut in the upper left corner has been played already, so this move in the centre would be really no mistake, contrary to one of KataGo's selfplay games ( 58ct).

:
White captures the nakade "early".

Alternative option (CHITOOM) is .

:
KataGo likes to give this atari "early".

Alternative option (CHITOOM) is .

:
Black descends to the upper edge, also giving atari at White's single stone.

Black will be worse in the Semeai Variation, if he defends with or at the bottom, instead.

If Black gets to play in the right centre, capturing White's single stone there, he will achieve a drawn game, only. Please refer to example #1 ( 58ct) and example #2 ( 58dc).

:
KataGo likes to play this atari "early".

Alternative option (CHITOOM) is .

:
Black's diagonal move takes profit at the top.

:
White captures Black's stone at the bottom.

:
White plays KataGo's bad-shape move in the left centre.

:
Black plays KataGo's solid connection.

Alternative option is .

:
White connects her single stone in the right centre.

:
KataGo plays this kikashi in the left centre "early".

Alternative option (CHITOOM) is .

:
KataGo likes to play this atari "early".

:
Black pushes at the upper edge.

:
Black is able to connect.

This move ends the playback of KataGo's sequence of moves.

:
We continue with a "straightforward" sequence, not jumping around on the board all the time.

Black plays 1/1 reduction.

Capture Variation:

Compared to Our Solution (2020), ...

• Black destroyed one point of White's territory at the upper edge.
• White got an additional point of territory at the top.
• Black got an additional point of territory in the left centre.
• Black destroyed one point of White's territory in the right centre.
• White captured Black's stone in the lower right, so gaining two points.

In total, gains and losses compensate for each other.

White + 2 => White + 2

Semeai Variation:

Compared to Our Solution (2020), ...

• Black destroyed one point of White's territory at the upper edge.
• White got an additional point of territory at the top.
• Black got an additional point of territory in the left centre.
• Black destroyed one point of White's territory in the right centre.
• Black captured one White stone less in the upper left centre, so losing two points.
• White captured an additional Black stone in the right centre, but one Black stone less in the lower right, so the net effect is zero.

In total, gains and losses compensate for each other.

Black + 4 => Black + 4