here is also a solution, but has quite a number of variations. If
, then
connects, and after
, a and
is miai for life.
is a plan to immediately secure the rectangular six (respectively a derivation). But
threatens simultaneously connection to the outside (
at a) and killing the rectangular six (
at
).
, in the hope of creating seki with the additional point a, cannot work because of the two cutting points in Black's group.