grenv: I'd be more interested in if the player's moves were identical to an easily utilized program...

Erm, more interested than in what? We're already talking about play that matches a bot's.

since even computers make minor mistakes, the odds of the player making exactly the same mistakes over an extended time is... ?

Well the odds of the same position coming up again is pretty low so that's not the best thing to look for and such a search would involve looking at the moves made. However, the odds of playing a zero error rate in match after match is nil and at or below a "World Class" error rate is very low, whereas the ease of detection is high. All you need are the error totals for the matches. When nabla and I investigated we found a zero error rate and no other possible conclusion than that a bot was being used for the moves.