unkx80: I made the claim that Black 51 might be a mistake. I might be proven wrong, but I still think that this makes interesting discussion. =)
Actually what I was thinking is the sequence up to , where the marked stone gets captured by snapback and White breaks out of Black's enclosure. If Black does not play at , then would have lost its meaning.
What do the others think?
That was my first idea. However, if you make a positional judgment after this sequence, Black is not very well off. Also after White a Black b, the corner is not completely safe.
Is this what Black has to fear ?
Dave After Charles played 52 and the trap became evident, I thought that Black could not afford to give up the outside just for the corner.
The / exchange of stones strengthens Black. Can Black give up the corner and hold things together on the outside? Through seems to be a natural progression. At this point Black has to prioritize the points marked a among others in coming up with a strategy from here. I am not sure what is best next.
Dieter: To my fallible eyes, the way White has mapped out her moyo and territory looks much more natural than Black's constructive approach. In particular Black's left side moyo has a wide gap facing white influence.