Arpad Emrick Elo
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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Saying the truth, mis-writing a move in correspondence chess can be fatal for the game.
But it depends, if the miswritten move is still valid or not fully valid. For example if the check mark (+) is missing, our opponent can reject the move, and can send it back to us for correction.
But if we have two knights, one can move to e4 and the other one can move to e5, mis-writing 12.Ne4 to 12.Ne5 can be fatal, and there is no way to proof we wanted to move the other knight.
This is a problem, that can be solved in server based correspondence chess, that this club offers.
By default the server is very indulgent in accepting moves, it accepts invalid moves if they are still unambiguous, adds check and capture marks, doesn't require the move number, etc. This is for reducing the number of rejected moves, but it results that some miswritten moves are not rejected, and are accepted as a different move.
Those players who manually compose their move messages, and therefore sometimes miswrite their moves may find the StrictMode setting useful.
If they turn it on, the server will accept only fully valid, complete moves exactly as shown in the next example:
Move 1234 12.Nd2-e4
In strict mode the server requires the move number, one dot as white and three dots as black, the piece letter (even at pawns), the from square, the capture mark or hyphen, the target square, and the check mark if needed. If any of these parts is missing, or the whole move is invalid the server rejects the move.
This way the chance that a miswritten move can be valid as an other move is lowered quite dramatically.
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