must be answered by
- and certainly not
or
. One suffers from shortage of liberties, and the other leaves Black with
.
If here,
is the only play that secures life.
looks like making two eyes, but due to the descent at
, Black can play
. Now White can only live by a ko at
.
Note that at a is wrong - see below.
If here, then
hits the critical spot, and White is dead.
If White throws in with ,
takes one of the kos. Now if White plays at a or b, Black fills with
, holding White to one eye.
If White later takes the ko back with ,
takes the other ko. Now if
,
kills.
lavalyn, Dansc, Bill Spight, unkx80.