Joseki-related life-and-death example 4
Black should under almost no circumstances ignore the double kakari and let White play . But how does Black continue if he decides that he has to play this line after all?
--Tasky (3d) I would absolutely not call this exchanges kikashi. Those exchanges are actually pretty bad for Black, since White gets very solid outside. Black plays and only because she has to make life; she would never play those exchanges of her own free will.
The hane at is absolutely necessary for living. Without it the black group dies.
guess: With the extra liberty at , black doesn't fear a white placement at so he can extend down the side instead.
Redbear: Black's retreat to the san-san in the 2nd diagram only results in a couple of points of territory after White squeezes the resulting Long J-Group with a placement at the 1-2 point.
This diagram shows a new recommended sequence resulting in significantly more points in the corner for Black.