This page explains how Thomas J. Huff (USATT# 6854)'s rating went from 1503 to 1521 at the Eldersburg Friday Night League event from 22 Apr 2011. 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.