This page explains how Umar Brown (USATT# 83534)'s rating went from 1056 to 1055 at the 2012 Luke White Memorial Team League event from 14 May 2012. 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.