"Elo" sums up how good a player is. If a player has 100 More Elo then the opponent, then there is about a 5/8 chance of victory for the player. "Score" defines a win, loss, or draw. 1 score = win .5 score = draw 0 score = loss
Just had to rewrite the Elo ratings systems formulas in Scratch. If you remix, please make major changes or I will report your project.