This page explains how Jim Biggs (USATT# 216789)'s rating went from 1648 to 1628 at the Experior Club League event from 24 Jan 2020. 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.