What is the name of the Hungarian-born American professor whose rating system was approved at a meeting of the United States Chess Federation in St. Louis in 1960?
United States Chess Federation "class" sections, in tournaments. USCF first instituted a rating system for over-the-board play in 1950, using a calculation formula devised by Kenneth Harkness. In 1960, the USCF adopted a more reliable rating system invented by Arpad Elo, a college professor of physics who was a chess master. Elo worked with USCF for many years. The system he invented, or a variant of it, was later adopted by FIDE, and is utilized in other games and sports, including USA Today's college football and basketball rankings. USCF has made further adjustments to the rating calculation over the years; the present calculation was
Arpad Elo of rating chess players. The original chess rating system was developed in 1950 by Kenneth Harkness, the Business Manager of the United States Chess Federation. By 1960, using the data developed through the Harkness Rating System, Elo developed his own formula which had a sound statistical basis and constituted an improvement on the Harkness System. The new rating system was approved and passed at a meeting of the United States Chess Federation in St. Louis in 1960. In 1970, FIDE, the World Chess Federation, agreed to adopt the Elo Rating System. From then on until the mid-1980s, Elo himself made