Janice Kims Life And Death Study
This is a shape that comes up quite often in real games. Can black kill the white corner?
It seems so. After , is normal, but the placement at creates the possibility of a snapback at . White is dead here.
If white pulls back, instead, he still cannot manage two eyes.
The tactic from before no longer work. Black can try to play the same move (to create the same dead shape), but white has a recourse with .
If black tries the placement directly, white also lives. It seems there is no way to kill the white group when it the hane is in place.
It seems black can kill white in this situation. If white jumps back instead and plays at , black simply pushes at .
Notice that in this position, with the solid connection instead of the marked point, white can live.
Black has to throw in after white captures, so white has time to make the second eye.
Consider a joseki like this 3-3 invasion after a pincer on the keima approach move to the 4-4 point.