ELO

A method for calculating the relative skill levels of players in two-player/two-team games.
Invented as improved rating system for chess, now used also in multiple computer games and some sports.

ELO in chess.

Grandmaster 2600 and up
Senior master 2400–2599
Master 2200–2399
Expert 2000–2199
Class A 1800–1999
Class B 1600–1799
Class C under 1600

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