Rating system
A rating system is a method that turns game results into a number for each player, rising after wins against strong opponents and falling after losses, so that strength can be compared.
A rating is a number that estimates how strong a player is, based on results against other rated players. Beat someone stronger than you and your number rises by more. Lose to someone weaker and it drops by more. Over many games the number settles near your real level.
The best known approach is the Elo system, and FIDE maintains the international version with its own regulations. National federations, including the United States, run their own systems with their own formulas, so the same player can hold different numbers in different places. Online sites also keep separate pools, which is why a number on one site does not match another.
Useful points for families: ratings compare players only within the same pool and time control, new players usually start with a provisional number that moves quickly, and improvement shows up over dozens of games rather than a few. Use a rating as a rough guide to the level of opponent and tournament section, not as a judgment of a child.
It sits close to USCF. The USCF, now branded US Chess, is the official governing body for chess in the United States, a nonprofit that represents the country in FIDE and maintains the national rating system most American tournament players are measured by.
A neighboring idea is Elo rating. An Elo rating is a number that estimates playing strength from results: the gap between two ratings predicts the expected score, and wins and losses move each player's rating up or down.
It sits close to Glicko rating. A Glicko rating is a rating that comes with an uncertainty value, the rating deviation, so that a player with few or old results can move faster than one with a long recent record.
How "Rating system" applies to your own results depends on where you stand now, and the improvement plans by rating band show what players near your rating work on.
Related terms
An Elo rating is a number that estimates playing strength from results: the gap between two ratings predicts the expected score, and wins and losses move each player's rating up or down.
A FIDE rating is the Elo-based number that the World Chess Federation publishes each month for players with rated games, with a published minimum of 1400, and it is the rating that FIDE titles are measured against.
The USCF, now branded US Chess, is the official governing body for chess in the United States, a nonprofit that represents the country in FIDE and maintains the national rating system most American tournament players are measured by.
The K-factor is the multiplier in an Elo-style rating update that sets how many points a rating can move after a result; a larger K makes the rating react faster.
A provisional rating is an early estimate of strength built from only a few games, which is allowed to move quickly until enough results exist to make it reliable.
A rating list is the published table of every player's current rating, refreshed at regular intervals so that tournaments and rankings can use one fixed snapshot.
Guides that go further
What a rating measures, how FIDE, Lichess, US Chess and chess.com compute theirs, and why the numbers differ.
Average chess rating and a good chess rating
What share of active Lichess players are rated above 800, 1200, 1500, 1800 or 2000, by time control.
Work out how a FIDE rating changes after a run of games.
Sources
- FIDE Handbook B.02 FIDE Rating Regulations (effective from 1 March 2024), Clauses 7.1 and 8.1, read Oct 21, 2026.
Want to spot this in your own games?
A first lesson starts with your games: George reviews them and builds a study plan around what he finds.