Ben Chaney:
@Noir Doing this allows Black to play A19 and have a chance to make a seki through ko.

Noir:
It seams to me, that it should be possible to play wA15, bA14, and than wF19 (instead of 1-1) should be also accepted. It ends up in the same situation I think. Having the stone on the outside could be even slightly better. Can anyone confirm?