This page explains how Brian Aschenbach (USATT# 76778)'s rating went from 1421 to 1420 at the NJTTC Monday League event from 11 Jan 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.