Competition, history, and culture
Ratings and titles
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Elo
A numerical system that estimates competitive strength from a player's results against rated opponents.
Performance rating
Performance rating estimates the rating level represented by a player's result in a specific set of games against opponents of a given strength.
Live rating
A live rating is an in-period estimate that incorporates recent results before those changes appear on the next official published rating list.
Provisional rating
A provisional rating is a temporary strength figure used before an official or established rating exists, but its exact meaning depends on the system using the term.
Initial rating
Level: IntermediateThe first playing-strength number that FIDE officially publishes for a previously unrated player.
Unrated player
Level: BasicA player who has no published rating on the particular list and time control used for the competition.
Inactive player
Level: BasicA player who keeps a FIDE rating but has played no rated games for one year.
Rating floor
A lower limit that a rating system places on a rating or uses as a minimum value for a specific calculation.
Development coefficient
Level: AdvancedThe multiplier controlling how much a FIDE rating changes when actual results differ from expected results.
Scoring probability
Level: AdvancedThe fraction of a point the rating system expects a player to score from a given rating difference.
Official FIDE Rating List
The recurring publication that establishes FIDE's official ratings and replaces the preceding list.
Rating period
Level: IntermediateThe interval during which an official rating list is valid and whose accepted results feed the next list.
FIDE ID
A FIDE ID, or FIN, is the unique number identifying a player registered by the International Chess Federation (FIDE).
Grandmaster
Grandmaster, or GM, is the highest player title in the open over-the-board series of the International Chess Federation (FIDE).
International Master
International Master, or IM, is an open International Chess Federation (FIDE) title below Grandmaster and above FIDE Master.
FIDE Master
FIDE Master, or FM, is an open over-the-board title of the International Chess Federation (FIDE), positioned between International Master and Candidate Master.
Candidate Master
Candidate Master, or CM, is the entry title in the open over-the-board player-title series of the International Chess Federation (FIDE).
Woman Grandmaster
Woman Grandmaster, or WGM, is a women's title of the International Chess Federation (FIDE) with requirements separate from the open Grandmaster title.
Woman International Master
Woman International Master, or WIM, is a women's title of the International Chess Federation (FIDE), positioned between Woman Grandmaster and Woman FIDE Master.
Woman FIDE Master
Woman FIDE Master, or WFM, is a women's title of the International Chess Federation (FIDE) whose ordinary rating threshold is 2100.
Woman Candidate Master
Woman Candidate Master, or WCM, is the entry-level title in the women's title series of the International Chess Federation (FIDE).
Arena Grandmaster
Arena Grandmaster, or AGM, is the highest lower-rating-band online title of FIDE Online Arena, recognized by the International Chess Federation (FIDE).
Arena International Master
An official FIDE Online Arena title earned by maintaining an online rating of at least 1700 for a required number of games.
Arena FIDE Master
An official FIDE Online Arena title earned by maintaining an online rating of at least 1400 for a required number of games.
Arena Candidate Master
An official FIDE Online Arena title earned by maintaining an online rating of at least 1100 for a required number of games.
ICCF Grandmaster
ICCF's highest player title for elite achievement in international correspondence chess.
ICCF Senior International Master
A permanent ICCF title placed between International Master and Grandmaster in correspondence chess.
ICCF International Master
A permanent ICCF international player title for strong results in correspondence chess.
Correspondence Chess Master
An ICCF international title for players who achieve master-level results in correspondence chess.
Correspondence Chess Expert
An international player title awarded by ICCF for regulated results in correspondence chess.
Norm
A norm is a tournament performance meeting the performance and opposition requirements of the International Chess Federation (FIDE) for a specific title.
GM norm
A GM norm is a performance satisfying the International Chess Federation (FIDE) requirements used on the path to the Grandmaster title.
IM norm
An IM norm is a performance satisfying the International Chess Federation (FIDE) requirements used on the path to the International Master title.
WGM norm
A tournament result that satisfies FIDE's conditions to count toward the women-specific Woman Grandmaster title.
WIM norm
A tournament result that satisfies FIDE's conditions to count toward the women-specific Woman International Master title.
Direct title
A direct title is a title that the International Chess Federation (FIDE) awards for a specified result in a recognized competition.
Title application
A title application is the administrative process for submitting to the International Chess Federation (FIDE) the evidence needed to approve or register a title.
Developmental Instructor
A FIDE trainer title with an associated license, focused on teaching children and adults who are starting chess.
National Instructor
An official FIDE title for trainers who develop players toward national and international youth competition.
FIDE Instructor
A FIDE trainer title with an associated license for developing intermediate and advanced players toward organized competition.
FIDE Trainer
An official title for coaches able to prepare advanced players for international competitions, title norms, and championships.
FIDE Senior Trainer
FIDE's highest trainer title, reserved for an extraordinary and sustained contribution to high-level chess.
FIDE Associate Organizer
The first FIDE organizer title for people with demonstrated experience running standard rated chess tournaments.
FIDE International Organizer
A FIDE title for organizers with broad international experience and specific preparation to direct high-level official events.
FIDE Premier Organizer
FIDE's highest organizer title, awarded for an exceptional record directing major official chess competitions.
