If White pushes at a, Black responds at b.
This is my first solution, hope I got it right... -phooky
lavalyn: Excellent work. Except that Black need not respond to a or b - either play by White and she dies in gote. Notice that to capture the three black stones requires both a and b - at which point she has only one liberty left. Thus White dies in shortage of liberties.
demetria wonders: Wouldn't white be more likely to respond with at
. Also wouldn't black answer the original
by setting up the ko first?
Roger? is confused. Sorry if I'm just a newb, but I don't see how Black can actually make the kill, if White plays at 'b'? Any move Black makes will get his center stones killed. The only option I can see is for him to go for a ko fight at e1.
Dan: Here is the situation after White plays at b in the previous diagram. As you said, Black dies if he makes a move... so he tenukis. White can't approach on either side (at a or b) without putting his own stones in atari. Eventually B could play at c and d (waiting until there are no ko threats if necessary) and pick up the White group, so it is not seki.
I think this is a reasonable response that would leave white with only false eyes. White might be able to live with a very small eye if it takes first, but it looks like there'd be too little to gain.
is atari.
Quacki: I thought about this to be the solution, but white gets a ko after this one (Which I did not see until after I saw the solution).