This gives us a ko...
...but this gives us a snapback, and Black is defenseless (unless there's another option for that I don't see). And since the problem page is referenced by Snapback Workshop, my hunch is that this is correct.
-- Scartol
Actually my intended snapback is the kind in this diagram, but your solution is correct nonetheless.
--unkx80
How about this?
After Black may respond at a or b. If Black responds at a, White captures at
. If Black responds at b, White captures at a.
If Black responds to W 1 at (or a), White captures at
. At that point the
stones are dead. Black can't prevent White capturing them.
--Bisqwit
Nice try, but can still create a ko this way.
--unkx80
As a ko this is better for White as she captures first (try to get first capture in a ko), but the snapback is naturally the correct answer. --Dansc