It seems you are not informed on the topic. There are 2 videos, made by FM Lilov analysing the games, and a scientific paper. This is not a case of "democracy" everyone can have a different opinion let's vote, since 2+2=4 also if your opinion differs.
This is the paper, some math knowledge is needed
http://www.cse.buffalo.edu/~regan/chess/fidelity/ACPcover-and-report.pdf
These are the videos (at least a 1800-2000 OTB level is needed)
http://www.youtube.com/watch?feature=player_embedded&v=Jr0J8SPENjM
http://www.youtube.com/watch?v=d7VvvRX-nOQ&hd=1
This topic cannot be underestimated, because like FM Lilov says, it could bring the death of OTB chess, if someone is behind Ivanov, and next month they begin to win tournaments using that cheating method.
Can you imagine if you pay 100$ to play in a tournament, and you don't have any chance to win, because someone is using Houdini?
I watched the videos and scanned over the article before, thank you.
My problem is not with the statistics or the analysis, As I said, he probably did cheat. The issue I have is the evidence, it is circumstantial. No-one caught him red-handed, so it becomes open to interpretation.
But since we're on the topic, was this "scientific" paper peer reviewed? I can prove many things using statistical modelling and get a very good correlation. Just because it is presented as good science doesn't mean it is.
Next week the next guy who puts in an amazing performance (and actually wins) only has a mild correlation with an engine, but he obviously also cheated, because if you build the right case the statistics doesn't lie, or does it? How about a guy who gets two GMs and an engine to feed him moves that do not correspond to typical engine play?
The world needs more critical thinkers, not less. You're spouting opinions as if it is the truth. Yes, it is unlikely, but can you prove it is 1 in 1,000,000? Let's look at DNA, that's solid right? Read this: http://www.freakonomics.com/2008/08/19/are-the-fbis-probabilities-about-dna-matches-crazy/
But even that was sourced of the internet, not a real source of reliable information at a long shot.
@johnyoudell: Bob Beamans record was amazing indeed, but he was already in the final of the Olympics. It was a miracolous jump made by a top GM in his sport. Just like the game with Octopussy in that match between Karpov and Kasparov.
Anyhow, you have a big phallacy in your reasoning when you state that the evidence of the Professor is worth more then the comment of Lilov. Please, tell me, who is the expert in chess? The one with the higher rating or the one with deep knowledge in statistics? If you say that the opinion of a chess expert is not that important with regards to the defamation of your client that he is not a real chess expert, what is then the value of being a chess expert? Nothing? How can there then be a case of defamation? You can only state a case of defamation if it is worth the trouble, hence if the opinion of experts in the field are considered reliable. You can only have a case of defamation when there is a dispute between acknowledged experts in chess who say that Ivanov was cheating or not. As long as there is no dispute among acknowledged experts and the opinion of experts is not considered worthwile (compared to the opinion of experts in another field of knowledge), then is there no case for defamation. To establish a case for defamation you would have to find a GM who is believing in the honesty of Ivanov.