This page explains how Dana Mills (USATT# 1180193)'s rating went from 1200 to 1123 at the Newton TTC September 2023 Open held on 10 Sep 2023 - 10 Sep 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.