This page explains how Desmond Wilson (USATT# 15897)'s rating went from 2229 to 2225 at the 2009 Millcreek Open held on - 25 Oct 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.