Data "analysis", I don't understand why this isn't a Gaussian nor a Ma I have downloaded all the elo ratings of all active chess players in May of the FIDE and I have made an histogram. I have plotted the result on a graph rating vs number of people with this rating. I do not understand why the graph is not a Gaussian. It looks like a reversed Maxwell distribution to me but I do not understand why it is this way. Picture of the graph can be found there: https://www.physicsforums.com/showpost.php?p=4401602&postcount=7. It's not a homework, it's a question that has been grown up in me since last May. If someone have some ideas on why the ratings spray this way, I am all ears.