This page explains how Gordon L Gregg (USATT# 6264)'s rating went from 1754 to 1741 at the Butterfly MDTTC February Open held on - 15 Feb 2009. 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.