: ( 232)
White starts the ko, instead of filling-in one of her false eyes.
:
White's centre group has five effective liberties left, pre-empting Black from connecting the hanezeki's tail. Therefore, Black must play a ko-threat. Please note the White's group in the top left corner has seven liberties left, so Black has no valid ko-threats in this area.
:
White simply fills-in one of her false eyes.
:
The situation is the same as in the main line of this chapter. White's centre group still has five effective liberties (2 * w, 3 * c), after White captured the ko.