This page explains how Chris Mosio (USATT# 28893)'s rating went from 2026 to 1963 at the LYTTC Friday Pro League event from 14 Aug 2015. 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.