If Black's group in the top right has got two eyes (), White must take Black's centre group off the board. And this costs White over 20 points, as we know already ( 882).

This applies equally, if Black has got a stone at . Now Black first plays the forcing exchange of , , and then saves his single stone with ; White cannot get more than one eye. Again, White has to capture Black's centre group.

After the guzumi, White can provide safety for her -group, by playing one of the labelled moves.