seems to do the trick.
forces the capture. The result is the same if
and
are reversed.
The throw in makes the eye false, and there's insufficient room for white to run and make new eyespace.
Now a and b are miai for the kill.
If white plays at a or b black again kills with c. If
is played at c, black has can kill with either a or b. He can't tenuki; white could take either to make an eye.
This looks like seki, but the marked stones can eventually be placed in atari.