Charles This whole page seems quite questionable. At least, there seems not to be any 'standard' example here.
Yes, the page ought to be giving clear examples of why one should play away from thickness. It has got bogged down in self discussion? ~ian~
Moved out from page:
In this artificially created position, the marked white stone obviously goes against the proverb not to play in the neighborhood of thickness. White plays just next to a thick black position!
Is it a bad move for this reason? No, there is nothing wrong with it because this move is a kikashi which can be discarded after Black connects. White is not trying to establish herself in the area, she just wants to play a move which might help her in the future, without losing anything. On the contrary, an invasion at a for instance, would go against the rule and would be very bad (there is absolutely no prospect of making a base for White in this area).
Charles Matthews That seems to assume Black will just connect in reply to the peep. Black should certainly play here first. If White plays
that's heavy, so that Black could play
with some satisfaction.
at b is a better idea but then there is no threat to cut, so the peep is a failure. The idea here is that Black is so strong he shouldn't be forced and pushed around like this.