This page explains how Thomas H. Shirley (USATT# 9977)'s rating went from 1715 to 1709 at the 1999 Millcreek Open held on - 3 Oct 1999. 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.