: ( 229)

!!! In this sub-variation, Black will do without Michael Redmond's kikashi in the bamboo joint. White must be on her guard not to fall into a surprising trap. !!!

: (A 316)
Here, White cannot keep things as simple as in the main line by playing the solid move of in the centre.

White must prevent a larger eye for Black from above, instead. It will develop an additional shared ko in the centre that is also shown in the theory chapter as FLAG 8a ( 1036).
Please note that - under the assumption that the following sequence will remain unchanged, i.e. Black will not get a larger eye in the centre - a Black move at (answered by ) would have the same effect of a smaller eye. But White could have taken an additional Black liberty with her move . In principle, it seems that White lost a move here; so White must be extremely careful with the timing of the filling-in of her second false eye in the centre.

: (B 317)
It will not benefit Black to connect his partial groups with a move at , instead.

: (A 318)
Black must take this point. He cannot play sagari at now.

: (B 321)
If White plays at , instead, allowing Black to get some kind of larger eye in the centre, she must be on her guard thereafter.

: (109 324)
Black should not capture White's single stone in the centre with a move at , before having played this sagari. Otherwise White would take this point, creating a third ko-shape, which favours White. This is also shown in the theory chapter as FLAG 8b ( 1047).

: (A 329)
Black cannot take advantage, should White not capture Black's single stone now.

:
It would not change the outcome, if Black did not capture White's single stone now.

:
Filling in her first false eye is safe for White.

: (A 330)
However, White should not fill in her second false eye at now, for technical reasons. There are too many liberties left, so this move hurts White's flexibility. However, it would be a game-decisive mistake, only in the case that White did not have any ko-threats on the left side of the board.

: (B 332)
It will not help Black to occupy an outside liberty, at , instead.

: (A 333)
It will not help Black to play a ko-threat on the right side of the board, instead.

Ko: ; ; ;

:
White uses the filling in of her second false eye as a ko-threat.

:
White is able to capture the central ko as a ko-threat.

:
Black has no valid ko-threats left, so White is able to connect the ko on the right.

:
Finally, White captures the central ko, and wins the ko-fight.