I have been asked to add a variation tree to this page in order to better and more clearly illustrate the evolutionary history of the different solutions.
You will find this visualisation at the bottom of the page.

In the LifeIn19x19 forum, I have published some intermediate results for further training especially with the non-Main-Semeai variations.
You can find them starting from here.

黒先
Black to play

白の方に提る一石ある
White has one prisoner

Black plays the Guzumi at the latest possible moment.

White tenukis, continuing with Yamada's Tsuke in the upper left corner.

uses her sente to immobilise Black's five stones in the Nakade.

White wins by two points.

Black started the game.
White captured one Black stone before the problem's setup.

answers the Guzumi locally, triggering the Main Semeai.

White wins by two points.

This line's Semeai Variation would end with a Black win by four points.

With in the lower left Black triggers the Semeai Variation.

White wins by two points.

Black plays the Guzumi
just before the Crosscut Sequence in the left centre is completed.

White does not answer locally,
but pushes into Black's upper left corner from below with .

White wins by two points.

After Black has already inserted both Throw-in and all the Kikashi in the Hanezeki "early",
he now also plays the Guzumi "early".

blocks the path of the Hanezeki's Tail at a length of four stones.

White wins by two points.

Black plays the Guzumi "early", after a change in the order of moves
(Black played both Throw-in and all the Kikashi in the Hanezeki "early",
but did not reduce White's upper right corner with Harry's Hasami-Tsuke) before.

blocks the path of the Hanezeki's Tail at its minimum length of two stones.

White wins by two points.

White decides to change the order of moves with .

intends to capture some of White's stones in the Hanezeki,
so securing "early" life for his large group in the upper right.

White wins by two points.

Black starts with connecting at .

extends in the corner.

launches a change in the order of moves.
spoils White's shape in the Hanezeki "early".
A "usual" continuation would have been
, , , , ..., , , .
extends in the corner.
A "usual" continuation would have been
, , , , , ...,

Non-Main-Semeai Variation #5
captures some White stones in the Hanezeki.
A "usual" continuation would have been
, , ..., .

For the other Non-Main-Semeai Variations it is imperative that Black has previously played both Throw-in , in the Hanezeki, providing White with two additional prisoners (= points).

Playing the Kikashi , in the Hanezeki "early" does not affect the ensuing sequences.

The next Non-Main-Semeai Variation is possible regardless of a previous reduction of White's upper right corner.

The Tail of the Hanezeki continues its journey with .

Non-Main-Semeai Variation #4
Black plays the Guzumi "early", with a length of the Hanezeki's Tail of two stones.
blocks the path of the Hanezeki's Tail.
The "usual" continuation would have been .

For the next Non-Main-Semeai Variation it is imperative that White's upper right corner has been reduced by Black beforehand.
KataGo likes to play as .

The Tail of the Hanezeki continues its journey with .

Non-Main-Semeai Variation #3
Black plays the Guzumi "early", with a length of the Hanezeki's Tail of four stones.
blocks the path of the Hanezeki's Tail.
The "usual" continuation would have been .

blocks the upper left corner.
Black could have enforced the "usual" 2022 Solution by inserting the Guzumi prior to any of the -moves in the centre (White would be forced to answer locally at ).

Non-Main-Semeai Variation #2
Black plays the Guzumi "late".
pushes into Black's upper left corner.
The "usual" continuation would have been .

The "usual" sequence continues.
If Black played at , at the left edge could enter another Non-Main-Semeai Variation.
The "usual" continuation would have been .
If Black played at , Yamada's Tsuke could enter another Non-Main-Semeai Variation.
The "usual" continuation would have been .

answers the Guzumi locally, continuing with the "usual" sequence.

White inserts the forcing sequence for the reduction of Black's upper left corner territory that starts with Yamada Shinji's Tsuke .
Here, White could also start with playing at first, resulting in a change in the order of moves.

Non-Main-Semeai Variation #1
immobilises Black's five Nakade stones, forcing Black to live independently at the right with .
Even now, White could have returned to the "usual" way with .

After there comes the last decision point for Black in this presentation.

Capture Variation of the Main Semeai
defends in the upper left, resulting in the "usual" Capture Variation of the Main Semeai.

Semeai Variation of the Main Semeai
Connecting with in the lower left is an alternative option for Black; the Semeai Variation of the Main Semeai will result.
The Capture Variation of these lines might end with the same final score, but KataGo has a preference for the Semeai Variation in these cases.