Variations of Our Solution (II)
VAR
(C)
(B) 
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Due to White's initial forcing moves of On the right side, Black does not have any ko-threats either. White's centre group has four liberties left, so the atari of |
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, and
, in the upper left corner (=
here), Black does not have any ko-threats on the left side. White's group has seven liberties (
) against five liberties (
,
) of Black's group in the lower right, so White will win a semeai between these two groups, even if Black is allowed to make two moves in a row.
on the upper edge is no valid ko-threat.
:
