xela: White continues this way? White 'a' next, and black can't escape... but it looks messy. Is there a better way?
(If throws in at the marked stone, then
at
makes a seki.)
Yohei: looks ok, but the
,
exchange is bad timing.
Black needs to answer at
(or at a, but this makes very little difference), and now white can exchange
for
.