44Point33InvasionExtensionHaneBelow

Hane below  

is not joseki but might be considered when Black has stones on the left side making White's life there not so easy, or when defending upper side territory.

Here we discuss what happens without such context.

Counter hane

Hane  

White's basic response is a counter hane. Black can extend at and take sente after White's capture. Black has influence but is left with a vulnerability, while White is alive in the corner with good aji and the potential of developing to the left side.

Hane on both sides  

If Black hanes again at , then after White's capture at , Black has to come back and defend the cutting point with . This is the same result as if Black in the previous diagram had not taken sente to play elsewhere but turned at here.

For an early invasion, here is probably giving away sente too easily.

Stretch

Stretch  

If here, Black can play elsewhere. Locally, a, b and c are possible

Hane outside

Hane outside  

is an overplay. cuts and White has to crawl towards life. There will hardly be time to save the cutting stone .

Save the cutting stone  

If White draws out the cutting stone with , Black develops on both sides with and , leaving White afloat in the center and small life in the corner.