Once the reader noticed that starting at a is wrong, here would be fairly obvious. Or perhaps the reader found
first.
If captures the
stone, then
is an atari, forcing
, and
destroys the other eye.
Actually, at
works too. Then White
, and Black a. Just a bit more complicated.
here would be similar.
transposes the position to one variation of the standard flying saucer shape.
Here, at
kills just as well. Then if White at
, Black has a choice of a or
.
As mentioned at the beginning, the hane at is a mistake. With
occupying the same point as the first move of the solution,
onwards became ineffective. After
, the three Black stones is caught in a connect-and-die: if Black a connects, then White b captures everything.
Note that at
allows Black to kill by playing at
, so
is the only move.