There may be death in the hane, but White's descent adds more than one liberty. Black cannot approach from the left.
White wins the semeai.
The kosumi offers stout resistance.
( at
)
looks reasonable. But after
, what can Black do?
is atari, leaving Black no time to make a second eye. Through
, Black is dead.
makes shape, but ...
is a sacrifice to prevent
at a.
The block perhaps offers stouter resistance.
White crawls in
Black now has a few choices.
( at
)
After makes an eye in the corner,
-
is a squeeze. The placement of
prevents ko.
Black can prevent the squeeze by connecting.
After does Black stand a chance? If
at
,
at
.
Can Black prevail against the descent?
-- Bill Spight