: ( 246)
White answers Black's kikashi with the atari. This will gain points, but lose a move. Therefore, it is not necessary for Black to play the guzumi at here.
:
We have reached the position before the mutual connection of opponent's liberties. Black's group in the top right has 12 liberties (), so it is save from the Punishment Semeai. However, White will capture the two marked Black stones, while occupying Black's liberties.
This will become a change in the order of moves to a variation that we will calculate later ( 421). White's total net gain will be only two points, so Black will still win the game.