This page explains how Jim Chai (USATT# 1648)'s rating went from 2122 to 2049 at the Swan Friday O2000 Team League event from 30 Jan 2015. 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.