Elo Scores

What are Elo scores?  They were originally developed for chess, but they can be adapted to any game.  Essentially, you start out with a score of 0.  Every time you play a game, your score is adjusted accoring to the following formula:

Adjustment = S*(W-p(E_o)).

Where:  S is the elasticity factor.  In this zine, it is 60 for your  first 10 games, 40 for your second 10 games, and 20 thereafter.  This represents the maximum number of points you can win or lose against any single opponent.

W is 1 if you win, 0 if you lose, and 0.5 if you draw.

p(E_o) is the expected probability of a win given the difference between your Elo score and your opponent's.  The basis of this is that if you have a score 200 points higher than another person's, you are expected to win 75% of the time.

In multiplayer games, your score is adjusted based on how you finish compared to each of your opponents.

Elo scores are calculated separately for each game, and they cannot go negative.  Once you have played a game, your minimum score is 1, and it cannot go down as long as it is 100 or lower.  Once you achieve a score of 100, it cannot go below that, but you can then lose Elo points.

Scores below are rounded to the nearest point.

S.O.B. Home