This page explains how Earl David Scott (USATT# 9848)'s rating went from 1668 to 1627 at the 2007 St. Peters April Open held on - 15 Apr 2007. 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.