US SQUASH

About the Ratings

The US Squash rating algorithm uses all matches from the previous 45 months in the US Squash database to calculate a relative measure of each player’s ability. Your rating is a great way to compare your level against friends and competitors, find a match against some of similar level, or track your improvement over time!

The algorithm was developed between 2012-2014 by Elder Research, a data mining and predictive analytics firm based in Charlottesville, VA known for their work in sports data analytics.

The rating scale begins at 1.5 and top rating around roughly 7.0 mark for the top world professionals. The majority of club-level squash players are in the 3.0-4.5 range, levels which would coincide to what were formerly referred to as “C” or “B” level club players. Professional players play at a 6.0+ level.

Ratings are calculated in one pool, for all players including juniors and adults, men and women, and also across all leagues, tournaments, and friendly matches. Generally, the more matches a player enters in the US Squash system, the more accurate his or her rating will be.

Please see the below tabs for additional information on how ratings work:

The Math Behind The Rating Algorithm

The US Squash algorithm builds connections between players as they compete against each other, and adjusts ratings due to wins and losses. The strength of a match result is taken into account (whether the match was 3, 4, or 5 games), and matches played more recently have more weight than those played further in the past. Matches affect a player’s rating for up to 45 months, or until 50 newer matches have been played. Players in the system who have more results in the system will have more stable ratings, whereas those with fewer matches will adjust more quickly as the system gains new information on them.

The algorithm is iterative, and runs until player ratings converge onto stable values for each player. This allows the system to look at all players in complete relation to all others in the US Squash database.

Click here to view the basics of the final algorithm

Descriptions of the terms involved:

Min_rating: Creates a floor of the minimum rating for players in the system. The minimum rating moves everyone below to that number after all ratings have converged. It does not shift the distribution curve.​

Mean_rating: The overall mean rating will be set to match this value

Spread: This adjusts the standard deviation of the distribution. If you increase the spread, the range will increase, and if you decrease it the range will decrease. For example, if the spread is set to .7, if a players beats 5.0 player infinity times she can move up only .7.

Ratings FAQ’s
  • Why can’t I see the rating move match-to-match on the “matches” tab of my profile?
    • The new algorithm runs many iterations of the calculation for each player each time it is processed. Therefore, there isn’t a new rating calculated for each match; instead, the algorithm looks at all results and determines the most appropriate ending rating for each player in that period.
  • Do all my matches count equally?
    • Generally, all matches are taken into account. A player’s most recent matches, however, are weighted more heavily in the calculation than older matches. Only the players’ most recent fifty matches are factored, and no matches outside of the previous three years are used in the algorithm.
  • Will the rating scale change in the new algorithm?
    • The rating scale of the new algorithm remains similar to the ELO algorithm.  Players are capped at a lowest rating of 1.5, and the top professional-level players cap around 6.5.  The majority of players exist in the 2.5-4.5 range.
  • Will my rating move up or down?
    • Some players will see a rating increase with the new algorithm, and some will see a decrease.  General rating distributions will remain similar to in the ELO algorithm.
  • How do I get a rating?
    • Any players playing matches in the US Squash system receive a rating, whether those matches are friendly, league, ladder, or tournament matches.
  • How do I view my rating?
    • All US Squash members or account holders can view their rating on their US Squash or Club Locker player profiles.