Elo rating system - Wikipedia
https://en.wikipedia.org/wiki/Elo_rating_system• Go: The European Go Federation adopted an Elo-based rating system initially pioneered by the Czech Go Federation.• Backgammon: The popular First Internet Backgammon Server (FIBS) calculates ratings based on a modified Elo system. New players are assigned a rating of 1500, with the best humans and bots rating over 2000. The same formula has been adopted by several other backgammon sites, such as Play65, DailyGammon, GoldToken and VogClub. VogClub sets a new p…
Chess rating system - Wikipedia
en.wikipedia.org › wiki › Chess_rating_systemA chess rating system is a system used in chess to estimate the strength of a player, based on their performance versus other players. 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 .