GokyoShumyoSection4Problem5/Attempts

attempt 1  

atulab: is sente so white gains enough momentum to win the race, unless at can kill some stones ( turns the race in a one eye against no eye with a shared liberty).

continuing  

pwaldron: Black has a continuation to get ko, though.

attempt 2  

pwaldron: How about this way?

xela: Yes, I think this works--but I have a vague memory of having seen similar positions where white first forces at , and I remember not understanding why that way was considered better (sorry to be so vague as to details). Compare variation 2a:

variation 2a  

xela: This makes things more interesting. White can still win; I think it's atulab's turn to make the next diagram :-)