This page explains how Michael Zhang (USATT# 89100)'s rating went from 2189 to 2177 at the LYTTC Friday Pro League event from 5 Jan 2024. 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.