is now a cutting point that white simply cannot stop. No matter how white responds, something bad is going to happen.
If white tries resisting by extending to and , then kills the two stones and black lives in the corner.
White's best course of action is probably to connect. threatens to kill the white group anyway, so is neccesary, while also building enough liberties to play , which kills the corner.
I'm waiting for a stronger player to approve this before I move it to the Solution page.
--Hikaru79
Dieter: My first thought was this squeeze sequence. If at then at .
Hikaru79: Ooh... oops. ^^; Yeah, that works too =P