This page explains how Mark J. Hoffman (USATT# 24438)'s rating went from 1657 to 1621 at the Vernon Hills Giant RR/Teams Tournament held on 7 Nov 2020 - 8 Nov 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.