FIDE ID or FIN: what the player number means

Explanation

A FIDE ID, also called a FIN from FIDE ID Number, is the unique identifier a person receives when registered by FIDE, the International Chess Federation, in its player database. It is not a rating, which is a number measuring competitive strength, and it is not a title. Its purpose is to connect the correct player identity with rated games, titles, national federation information, and other official data.

The regulations state that two players cannot share the same FIN and that one person is not allowed to have two different FINs. The number remains the same throughout the player's chess career for both over-the-board chess and FIDE online use. If duplicate records exist, they need to be corrected rather than treated as separate identities.

The FIN matters in practice because tournament reports, ratings, and processes such as a need to attach results to the correct person. It is also used to connect a FIDE identity with recognized services, including progress toward .

Common confusions

FIN vs. FIDE rating

The FIN identifies the person and normally stays the same. A rating is a competitive performance number that can rise or fall.

FIN vs. title

Having a FIDE ID means the player is registered, not that the player holds a title. Titles are separate achievements with their own requirements.

Sources

1.Regulations for Registration & Licensing of Players (effective from July 1, 2015), FIDE
2.FIDE Title Regulations effective from 1 January 2024, FIDE
3.How to get a FOA title?, World Chess / FIDE Online Arena