Reducing the eye space is the key here. and
hanes, and reduce the black group into a bent three. The placement at
is the final touch.
This one is similar. Capturing and
will not give Black his second eye.
is interesting. But White plays at
, and a and b are miai. Black is still dead.
The hane at is the wrong play. After
,
and
are miai.
If it becomes like this, black dies? For to black die, it must take the three stones. What if he doesn't take it? the white stones are dead?
The direct placement at allows Black to live with a seki, as in the previous problem.
See also: