Glicko Ratings:

 

This web site is intended to provide some background in the theory and practice of rating competitors in games and sports.

Two rating systems I have invented:

• The Glicko rating system, which is in the public domain
• The Glicko-2 rating system, an improvement on the original Glicko system (revised on February 22, 2012). The system was under provisional patent, but is now in the public domain.

   

  NOTE: As of February 22, 2012 the Glicko-2 iterative procedure ("Step 5") has been corrected and is now stable. Please see the Glicko-2 rating system document for details.

 

I applied the Glicko Boost algorithm, which I developed in 2010, to the game outcomes data in the Deloitte/FIDE Chess Rating Challenge.

 

Coming soon (when I find the time!):

• History of common rating systems
• Rating tutorial
• Online rating calculators (including calculators for Glicko and Glicko-2)
• ... and much more!