Flexible maintenance of a framework barrier

The diagram to the right shows a nine stone handicap game. White 1 invades the top left framework link. The pincer black 2 severely restricts White's potential eye space but in GCS terms perhaps does not sufficiently protect the weakest framework stone. So rather than defend the single stone, with white 3 White switches the attack to the now more vulnerable adjacent framework link.

If Black responds with another pincer at
A, White can now settle at least his top stone by playing at B.

If Black should respond with
B then White can occupy the framework link space by playing at A.

And if Black should play a splitting stone at
C, again White can sacrifice white 1 and instead settle his top stone by playing at B.

In any event, given the limited strength of the surrounding black stones, no matter where black 4 is played, White should just be able to establish some living stones to form a barrier to one or other framework link.