This page explains how Jim Chai (USATT# 1648)'s rating went from 2070 to 2060 at the Swan Friday O2000 Team League event from 18 Sep 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.