This page explains how Chris Mosio (USATT# 28893)'s rating went from 2121 to 2108 at the LYTTC Friday Pro League event from 10 Feb 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.