(Referenced by 46, 730e, 738f)

: ( 718)
Black plays hasami-tsuke.

: ( 738a)
In Autumn 2017, Joachim addressed the question whether playing the kikashi of Michael Redmond 9p at might be feasible with this move, instead of continuing the Main Semeai by occupying one liberty of White's group at the left.
According to the results of our investigations, this kikashi in the top right corner will surprisingly result in a score of Black + 2!
In the top left corner, the tsuke of Yamada Shinji 6p (resulting in a final score of White + 2 ( 751)) will not be playable any longer, but the "classical" atari at still remains as a better option in response to the kikashi.

( 739):
White should not give atari at . Black will gain a key liberty.

Please note that White's move successfully keeps Black from playing the kikashi of Michael Redmond 9p () now, as White will answer with the atari of at the upper edge. Thereafter, if Black gives atari at her two stones (e.g. at ), White will capture at , and her stones are safe.

( 740):
Black is able to connect one of his stones, but he cannot prevent White's endgame in the top left corner with a move at .

( 741):
Black must not connect his pivotal hasami-tsuke stone. To do so would lose an essential liberty.

:
White captures one stone and ends in gote in the upper right. In the marked area, Black has five liberties (), on the left, he has occupied two liberties of White's group with and . White has secured four points of territory (, )

///:
The circumstances are now equal to those in the professional solution at the end of the sequence in the upper right. In the marked area in the upper right, Black has seven liberties (), but the two liberties () of White's group on the left are still unoccupied. Here, too, White gets four points of territory ().