Seriously, dude, your personal insults aside: this here is goalpost moving.
You wanted a low-level power that can prevent movement, and you got one that works from level 1.
Concede the point and let's move on.
-- N
A foe shifts away and charges. Combat Superiority didn't prevent jack (and it's also not a power). Foes should almost never go out of their way to allow an Opportunity Attack, so Combat Superiority should almost never happen in the game system. Why would you as a DM hand out free OAs to a Fighter if the foe has any intelligence at all? The foe does not even need to know about CS and he should still not be handing out free OAs.
And if anyone is insulting, it's the guy who started it by writing:
Sure, PHB pages 75-88.
It's a good read, have fun with it.
and
Page 76, Combat Superiority.
Seriously, go read about the Fighter. Apparently you're in for a happy surprise.
Implying that I haven't read this. Yes, your passive aggressive style slips by the moderators, but that's always been your style to not get in trouble.
Course, the fact that Combat Superiority does not actually prevent a foe from shifting away and does not really answer the question means nothing to you either. You keep claiming it does.
Combat Challenge can punish a single marked foe for shifting away from the Fighter, but a) the foe has to be marked (which is not always the case) and b) the Fighter has to hit (which is not always the case).
On top of that, after the first marked foe shifts away, ALL of the foes, marked or not, around the Fighter can then shift away and charge someone else with ZERO penalty.
Fighters don't stop didley. The game mechanics here only work to prevent movement if the DM wants them to, or doesn't realize that they don't actually work and just rarely moves foes away from the Fighter.
But the goal of the monsters should not be to go toe to toe with the Fighter (or any Defender), at least if the monsters have an Int of 8 or better. The goal of the monsters should be to take out Leaders, Strikers, and Controllers. Typically in this order, but possibly in other orders, situation depending. The monsters should try to gang up on individual PCs just like PCs should try to gang up on individual monsters, but not individual PCs that look like they are the most heavily armored. And this is not specialized knowledge. Most foes should know to not provoke Opportunity Attacks, regardless of whether they know about Combat Superiority. So, shifting away from a Fighter or a Paladin or a Swordmage should be a fairly standard tactic for monsters. Tactics 101.
If you haven't figured this out before, now you know.