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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.
1933 – The Correspondence Chess League of America (now ICCF U.S.A.) is the first national organization to use a numerical rating system. It chooses the Short system which clubs on the west coast of the US had used. In 1934 the CCLA switched to the Walt James Percentage System but in 1940 returned to a point system designed by Kenneth Williams.
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.
The most well known statistical method was devised by Arpad Elo in 1960 and elaborated on in his 1978 book The Rating of Chessplayers, Past and Present. [1] He gave ratings to players corresponding to their performance over the best five-year span of their career.
Former world chess champion (FIDE 2002–2004), formerly youngest grandmaster (1997–1999), formerly highest-ranked Ukrainian player (2002–2005) 34 Hungary: Peter Leko: 2763 2005-04 1979 Formerly youngest grandmaster (1994–1997), formerly highest-ranked Hungarian player (1999–2021, 2022–2024) Soviet Union United States: Gata Kamsky: 2763
FIDE publishes lists of highest-rated girl chess players; a "girl" is defined as being a player who is aged under 20 at the start of the year, and female. The following is a list of the players ranked number one girl in the FIDE rating system from January 2000 to the present day, along with their ratings during the periods in question.
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.
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