Kyu Exercise 151 / Attempts

Attempt  

emeraldemon: Does this work? happyyuppie: No. See below.

Attempt continued  

If at a, at .

But should have played here  

seki

So should have played here  

Black is dead

So is the right answer (I think)  

Next Black a, then White b (see previous diagram); Black b, then White a. Either way Black is dead.

unkx80: Yes, this is the solution. Thanks for the detailed analysis!