This page explains how Brian Aschenbach (USATT# 76778)'s rating went from 1823 to 1813 at the LYTTC Friday Pro League event from 29 Dec 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.