at . After , Black should play at and give up four stones. If Black resists all the way, the result is much worse.
I'm a weak amature, but I can see this one:
Any of these three work equally well. I have a minor preference for the top one. -Joshua
MrTenuki: Unfortunately, even a leaves at least 2 ko threats:
unkx80: If the right side is exactly as shown, I strongly prefer g.