The original chess rating system was developed in 1950 by Kenneth Harkness, the Business Manager of the United States Chess Federation.
Jorma Elo | Elo rating system | ELO | Árpád Göncz | Árpád dynasty | Elo | Árpád Tóth | Árpád | Árpád stripes | Árpád Fekete | Arpad dynasty |