(Referenced by 717; 815)

: ( 197)
Black continues with initiating the Crosscut Sequence.

: (A 221; B 225; C 363)
Black's last chance still to win is to play the guzumi at even now (i.e. "late"), assuming that our amateurish endgame is fairly reliable.

It is too late now for Black to close his upper left corner, and to finish the Crosscut Sequence, with this move at , instead.

He might also try one of Joachim's ideas, instead, either the hiki of on the upper edge, or the move at that captures White's left side. However, Black will not succeed in any of the aforementioned cases.

While the initial KataGo (2019) estimated the guzumi being possible even after the Nakade Sequence, the newer KataGo (2020) confirmed our judgement that the guzumi should be played "early".

The newest KataGo (2021i) plays the guzumi "very early", latest during the growth of the hanezeki's tail, and long before the Crosscut Sequence..

:
Answering Black's guzumi locally would return to the path of our solution ( 503) that White loses, so White gives atari in the top left corner, instead.

: (A 387)
Connecting the atari in the upper left, instead, is much too simple.

Black must provide more powerful resistance by living with his large group in the upper right corner, starting with a move at , instead.

: (85 388)
Alternatively, White could consider playing at .

:
White's last move threatens to kill the entire top left corner, so Black has to answer locally.

:
White saves her stones on the left side.

: (95 389)
The upper left corner is larger than the left side.

Black wins by two points.

White's shape on the upper edge has become stabilized by the initial moves of the Crosscut Sequence, resulting in a gain of a few points. But we think that Black will still win the game.
Nevertheless, it would have been technically better for Black to play the guzumi earlier than here, and to win White's tenuki-variations by at least five points ( 432).