This page explains how Jack (Hong) Zhang (USATT# 278798)'s rating went from 915 to 906 at the LYTTC Friday Pro League event from 8 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.