This page explains how Joe E. Griffis (USATT# 6276)'s rating went from 1981 to 2001 at the Butterfly Cary Cup Championship held on - 21 Mar 2010. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.