This page explains how Jim Chai (USATT# 1648)'s rating went from 2191 to 2130 at the Swan Friday O2000 Team League event from 3 May 2019. 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.