During the course of the Professional Solution, White has several opportunities to turn the outcome of the game in her favour, i.e. securing a drawn game.
Once White allowed Black to play the combination of Harry's Hasami Tsuke and Michael Redmond's kikashi in the bamboo joint during the reduction of her top right corner – at a moment when the top left and bottom left corner territories are still open – Black would win the game by at least two points.

Her first opportunity arises after completed the nine-stone nakade at the left side of the board.
It is not necessary to capture Black's nine stones with immediately.

White's second opportunity arises after keeps her group at the left from living independently.

It is not necessary to give atari at immediately, quite apart from the fact that it would be technically more correct to play this move at , and also much later in the game.

White's last opportunity vanishes with the occupation of the guzumi-point at the top right with .
During the reduction of White's top right corner, Black will choose the hasami-tsuke , immediately followed by the kikashi of Michael Redmond.

White will succeed neither by choosing one of the two local replies to the kikashi (atari ( 738a), solid connection ( 738b)), nor by trying to attack Black's upper left corner "late" (Yamada Shinji's tsuke ( 738c), classical atari ( 738d)).
All of White's desperate attempts will end in vain; Black will win by at least two points.

White must attack Black's upper left corner as early as possible, and she is bound to do so with the classical atari ( 730a).

Choosing the tsuke of Yamada Shinji, instead, will not lead to success ( 730d).

Black is also bound to follow the "usual" sequence in the upper left, starting with .

He can successfully play tenuki in order to occupy the guzumi-point , aiming at living independently with his large group in the top right, neither with ( 730b), nor with ( 730c).

Please note that all referenced sequences start at an earlier moment in the Nakade Sequence.

Finally, occupies the guzumi-point, as with the Professional Solution.
Black holds himself back, and trusts the classical push / sagari combination , , in order to avoid complications.

Black will also achieve a drawn game, if he chooses the Hasami-Tsuke Sequence , , , , instead, but he must be on his guard thereafter ( 730ca).
Please note that the referenced sequence starts at an earlier moment in the Nakade Sequence.

And the end of the displayed sequence, we have reached a change in the order of moves with the published Professional Solution, resulting in a drawn game.

White has had no promising oppotunity to play Yamada Shinji's tsuke in the upper left corner that would provide her with a gain of at least one, probably two, points, securing her win.