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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.
Performance rating (abbreviated as Rp) in chess is the level a player performed at in a tournament or match based on the number of games played, their total score in those games, and the Elo ratings of their opponents.
FIDE introduced the WGM title in 1976, joining the previously introduced lower-ranking title, Woman International Master. [ 21 ] The usual way to obtain the WGM title is similar to the open titles, where a FIDE rating of 2300 and three norms of 2400 performance rating is required against opponents who are higher rated than 2130 on average. [ 22 ]
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.
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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.
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