This page explains how Melvin Evans (USATT# 12920)'s rating went from 1539 to 1539 at the Pensacola Winter Open 2009 held on - 10 Jan 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.