The staff may well be evidence gathering. If I write on my profile I'm a murderer it doesn't make me one, you still need the proof. I'm sure the staff are addressing this matter however need more then just a statement on his profile page to take action and don't want the suspect alerted at this stage. Send a message via "Report abuse" close this thread and await their response.
How do you prove that someone is using a computer?
In this case you don't have to. He admits to it himself, making no exeptions.
Stop beating up on this guy... he's not 'cheating' in the immoral sense -- he isn't lying to anyone! He's playing chess the way he enjoys it (and there is skill to what he is doing) ... but what he's doing is against the current site rules ... (I say "current" site rules because I think they are going to allow a separate person+computer section, soon... there are people that enjoy playing this way, including Garry Kasparov!)
Pling you shouldn't have to play someone using engine help against your will. He shouldn't be allowed into tournaments. I'm sure the admins will straighten him out. But I think everyone should stop acting like the centaur player is some combination of Axe-murderer and moron... he's just a computer chess enthusiast.