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.
If white plays atari with , then
plays double-atari, threatening to capture at either a or b.
The atari from the other direction with is pretty much the same thing.
If white simply plays tenuki, black gladly takes the opportunity to kill with and
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
unkx80: Good one Hikaru79, I did not think much about the cut. But is tesuji, so I do not think it is going to work.