This page explains how Brian Chen (USATT# 31519)'s rating went from 2155 to 2156 at the Swan Friday O2000 Team League event from 4 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.