FLAG 7a: ( 1028)
It is Black's choice to try Joachim's solid move in the upper left, using the sequence of , , , , .

This will have no effect on the outcome, Black will still need one external ko-threat.

An important precondition is that there is no way that Black could gain a move, or at least one ko-threat, in the upper left corner by diverting from the main line sequence there.

FLAG 7b: ( 1034)
It is Black's choice to allow White to get a larger eye for her group, with a move at .

However, he must not do so, because White would win unconditionally.