Ratings

These ratings are calculated using an implementation of the Elo ratings system. Players have an initial rating of 1000, which is adjusted up or down as win or lose games against other players.

Games that are won or lost, from which you resign, or if they time out, all count towards your ranking. A cancelled game (once where you resign before the second player joins, or a public game that times out before a second player joins) do not count in the ratings calculations.

For now, the k factor is fixed at 32, allowing fairly rapid adjustments in the ranking values. It might be better to reduce it as the number of games played increases, but that's not decided at this point. Similarly, there's currently no ratings floor.