How to tell when somebody's cheating

There are several ways to cheat, but in reality none of them involve the
dice, no matter how much whining and complaining you might hear. The only
way you can be cheated "directly", that I know of, is if someone is using
snowie or jellyfish to determine their moves. That can be detected by
analyzing the match yourself and seeing if the opponent is playing at too
high a level. The rest of the cheating involves obtaining ratings points
by other various nefarious means, and if you played one of those morons,
they could not cheat you by somehow winning your match unfairly.