GokyoShumyoSection6Problem20/Attempts

variation (better for white)  

atulab: black must defend at a I think white has kept taken sente and more points than in the 1st variation

unkx80: I think the solution is right but your sente claim is dubious -- the six White stones including , and are under atari after .

atulab: well, I was talking about move 11: I thought for some reason that white has to defend at a.