This page explains how David Maisel (USATT# 76188)'s rating went from 1598 to 1522 at the Westford TTC March 2023 Open held on 5 Mar 2023 - 5 Mar 2023. 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.