I'm searching for a statistical method to determine if a player is cheating in an online game.
Given a number of positive points and a number of negative points per player (score) and given $n$ players ($n <= 64$). Each player can cheat independent of each other. I used standard deviation, which works great on a single player but fails miserably as soon as several players are cheating at the same time.
Is there any useful algorithm or formula for this problem?