Solution by lavalyn 17k:
Black takes the corner for eye space. Now the best White can do is to minimize the eye space available, but the available space is sufficient to ensure life.
For your viewing pleasure, some failure diagrams:
Black, in his attempt to take more of the side, loses after and
: on the second line, six die but eight live.
For your further viewing pleasure, some not so minor changes to the problem (by Sergio) :
If the stone is on the second line (instead of the third) Black is dead...
But what should White play in answer to a ?
Even if it's not a clear move to beginners is the only one that kills.
Deebster: Doesn't b kill Black too?
unkx80: Yes, b kills too.
If Black plays at a, White kills by the throw-in at .
fred : would Black live with ?
And is the rest realistic?
Charles No, should be at
.
k, i get it