Lithel: After , black must play
to open up some liberties. Now the White group inside has 3 liberties left, the Black group has 3 liberties as well, and it's White's move, but Black has an additional advantage...
Lithel: In this situation, playing at a now removes one of White's liberties. Approaching from the top requires the additional move at b though.
Mikesh: How about running at c?
Lithel: So if I'm reading this right, white is dead and black escapes. ( at a)
Mikesh: After black may take sente and play elsewhere. White cannot play
. She has to connect above
first. Otherwise B will capture there after
is played. So maybe W should take sente after
in the first place...
ChrisSchack: The clamp is the best I can see, 6 at either 7 or 8 are obvious failures ... but it fails anyway on the throw-in.
LukeNine45: I moved this to the solution page.
LukeNine45: In this situation, from above, what happens if white plays ?
JoelR: Black plays . White cannot play at a, it's self-atari, and if White plays at b, it transposes into "Fail from the top"; Black need not play again.