chaos has asked about suggesting a rating system for our Smogon ladder, and here are my suggestions. Basically, I propose to use the glicko2 system, which is exactly the same as the one implemented in the Shoddy ladder, with a few modifications. Assuming that R is the mean rating, RD is the rating deviation and v is the volatility of a player, the changes I suggest are the following: The Rating displayed to the player is just round(R), not R - 4*RD as is used on Shoddy. The Rating of a player is not always shown, however. It is only shown if RD<100, otherwise the Rating of the player is provisional. This way, a new player would need to play between 20 and 25 games for his or her rating to become visible. This should hopefully deter players from creating multiple accounts. RD cannot drop below the threshold value of 60. If the RD of a player becomes less than 60, it becomes equal to 60. This allows for the rating of a frequently-competing player to continue to change at a nice pace instead of very slowly, which should help players keep playing with their current account. RD cannot go above the threshold value of 350. If it becomes greater than 350, it becomes 350. This is a very minor change, done to make a player's rating deviation be at least that of a beginning player even if the player stops playing completely. If a player does not battle in a particular day, phi (which is equal to RD / 173.7178) becomes equal to sqrt((phi^2) + 4*(v^2)) instead of sqrt((phi^2) + (v^2)) as is currently implemented (and then the new RD becomes the new phi * 173.7178). This change makes a frequently-competing player's rating go provisional after about 14 consecutive days of inacitivity, which should deter players from occupying the top of the ladder for a long time without playing. It also has the effect of making a player's rating become as uncertain as that of a beginning player after about 9 months of inactivity (which means that if you don't play for 9 straight months, the ladder would consider you a noob even if you were #1 before stopping playing.) I'd like to have some comments from players that participate on the ladder to see if the above points address what they believe are shortcomings of the Shoddy ladder, and points for further improvement.