4-4 point low approach, tsukenobi, diagonal into corner
If Black blocks at here, White's stone at in the corner has too much aji.
Blocking at directly is a possibility. We see a reversion to a position in the jump variation.
on the 3-3 point is the third possible answer. White can again convert to the joseki of last diagram by playing at a, or she can leave the position open by simply extending to .