Welcome to Glicko ratings

This web site, maintained by Mark E. Glickman, is intended to provide some background in the theory and practice of rating competitors in games and sports. This site is still under construction.

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. The system was under provisional patent, but is now in the public domain.

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

Send feedback and suggestions to Prof. Mark E. Glickman: mg -at- bu -dot- edu