This page explains how Gerald Echols (USATT# 30052)'s rating went from 1768 to 1758 at the 17th Annual Decatur Open held on - 16 Aug 2008. 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.