The ELO system for rating chessplayers was named after its originator, Arpad Elo. Born in 1903, Elo emigrated to the USA when he was 10. Educated at Chicago University, he later became professor of physics at Marquette University, Milwaukee. He learned to play chess in his teens and played in a number of tournaments. He was champion or co-champion of Wisconsin 9 times between 1935 and 1961. He was active in the USCF (United States Chess Federation) from its founding in 1939. He spent 20 years developing and validating his chess rating system, which was adopted by FIDE in 1970 for international use.
His book 'The Rating of Chessplayers, Past and Present' was published in 1978 and is the definitive reference on the ELO rating system. Most chess organisations that perform ratings for players use the ELO system, or a variation of it.
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By default, the server sends back an acknowledgment message replying to every incoming messages.
It says the moves have been successfully taken, or if an error occurred with them.
When we take many moves a day the many answer messages can be annoying. There is a setting, if set, the server sends back replies only if something wrong happened with the move. If it could be taken in order, no reply will be sent back, only in case of error.
This is the Reduced Email Traffic setting, which prevents us from getting many annoying acknowledgment messages.
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