BSR 2003 W112 discussion
Suppose that White hadn't played tenuki after , but had answered at . There is a reading problem here, after is tried.
These plays are inevitable. Then Black has a choice of three directions in which to play atari:at a, b or c.
Black can play at a whenever it seems useful.
If Black plays this way, White's shape seems to be good enough after . Up to Black can only make a small dent in White's centre.
There are some other variations to consider: but White 112 in the game seems to have been a 'tenuki too far'.
unkx80: Argh, yes, it was a reading error on my part. =/
Migeru: Wasn't it I that missed the shortage of liberties? (Sorry, Charles)