Elo rating system, League of Legends Wiki

Elo rating system was used in League of Legends ranked games prior to Season Three when the League system was introduced. The Elo rating system is a method for calculating the relative skill levels of players, originally designed for two-player games such as chess. It is named after its creator Arpad Elo, a Hungarian American physics professor and chessplayer. The Elo system was invented as an improved chess rating system, but today it has been adapted for use in many other games. Variations of

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Elo rating system, League of Legends Wiki

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