This page explains how Doug Wallace (USATT# 220019)'s rating went from 1704 to 1617 at the Manor TTC Giant Round Robin held on 21 Aug 2021 - 21 Aug 2021. 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.