3-4 point high approach, double contact, noseki
This is a variation of the 3-4 point high approach, double contact joseki, which is not joseki itself.
is noseki, but White must be careful to obtain a good result. to are forced. At , White has as many as 6 choices.
After , White can cut at .
White is effectively cut.
This is comparable to but worse than variation a, for is not on the circled point and thus not efficient.
This looks difficult for White
This looks acceptable, but better for Black? m is important for White's stability
Again White is cut.
Since 1 of 6 choices produces a good result, and the others not a favorable one, we could perhaps classify this as a trick play.
Black's wall is too strong