![]() ![]() It was replaced by an Elo system, Deutsche Wertungszahl. This was the system of the West German Chess Federation from 1948 until 1992, designed by Anton Hoesslinger and published in 1948. The USCF switched to the Elo rating system in 1960, which was adopted by FIDE in 1970. Shortly after, the British Chess Federation started using a system devised by Richard W. The USCF adopted the Harkness system in 1950. The first one that made an impact on international chess was the Ingo system in 1948. Soviet player Andrey Khachaturov proposed a similar system in 1946. The first modern rating system was used by the Correspondence Chess League of America in 1939. ![]() The Elo rating system is currently the most widely used. The magnitude of the change depends on the rating of their opponents. In general, players' ratings go up if they perform better than expected and down if they perform worse than expected. In almost all systems, a higher number indicates a stronger player. Popular online chess sites such as, Lichess, and Internet Chess Club also implement rating systems. Most of the systems are used to recalculate ratings after a tournament or match but some are used to recalculate ratings after individual games. They are used by organizations such as FIDE, the US Chess Federation (USCF or US Chess), International Correspondence Chess Federation, and the English Chess Federation. System used in chess to estimate the strength of a playerĪ chess rating system is a system used in chess to estimate the strength of a player, based on their performance versus other players. ![]()
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