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Jeff Sonas is a statistical chess analyst who invented the Chessmetrics system for rating chess players, which is intended as an improvement on the Elo rating system. He is the founder and proprietor of the website, which gives Sonas' calculations of the ratings of current players and historical ratings going back as far as January 1843.[1] Sonas writes that, "Since the summer of 1999, I have spent countless hours analyzing chess statistics, inventing formulas and other analysis techniques, and calculating historical ratings."[2] He has written dozens of articles since 1999 for and other chess websites.[3] He was a participant in the FIDE ratings committee meeting in Athens in June 2010.

Jeff Sonas graduated with honors with a B.S. in Mathematical and Computational Sciences from Stanford University in 1991.


  1. ^ January 1843 rating list. Retrieved on 2008-12-19.
  2. ^ Welcome to the Chessmetrics site. Retrieved on 2008-12-19.
  3. ^ Man vs machine - who is winning? (October 8, 2003). Retrieved on 2008-12-19.