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The Glicko system is a more modern approach, which was invented by Mark Glickman as an improvement of the Elo system. It is used by Chess.com, Free Internet Chess Server and other online chess servers. The Glicko-2 system is a refinement of the original Glicko system and is used by Lichess, Australian Chess Federation and other online websites.
Due to the difficulty of computing performance rating in this manner, however, the linear method and FIDE method for calculating performance rating are in much more widespread use. With these simpler methods, only the average rating (abbreviated as Rc) factors into the calculation instead of the rating of each individual opponent.
The 2025 FIDE Circuit is a system comprising the top chess tournaments in 2025, which serves as a qualification path for the Candidates Tournament 2026. Players receive points based on their performance and the strength of the tournament. A player's final Circuit score is the sum of their seven best results of the year.
The International Chess Federation (FIDE) governs international chess competition. Each month, FIDE publishes the lists "Top 100 Players", "Top 100 Women", "Top 100 Juniors" and "Top 100 Girls" and rankings of countries according to the average rating of their top 10 players and top 10 female players in the classical time control.
In 1970, FIDE adopted Elo's system for rating current players, so one way to compare players of different eras is to compare their Elo ratings. The best-ever Elo ratings are tabulated below. The best-ever Elo ratings are tabulated below.
Highest-ranked Indian player (since 1987), former world champion (2007–2013, FIDE 2000–2002), formerly world no. 1 (2007, 2008, 2010, 2011) Soviet Union Russia
Mark Glickman created the Glicko rating system in 1995 as an improvement on the Elo rating system. [1]Both the Glicko and Glicko-2 rating systems are under public domain and have been implemented on game servers online like Counter-Strike: Global Offensive, Team Fortress 2, [2] Dota 2, [3] Guild Wars 2, [4] Splatoon 2, [5] Online-go.com, [6] Lichess and Chess.com.
In 1960, the USCF adopted a more reliable rating system invented by Arpad Elo, a college professor of physics who was a chess master. Elo worked with USCF for many years. The system he invented, or a variant of it, was later adopted by FIDE, and is utilized in other games and sports, including USA Today's college football and basketball ...