This page explains how Brian Chen (USATT# 31519)'s rating went from 2179 to 2171 at the Swan Friday O2000 Team League event from 22 Mar 2013. 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.