This page explains how Charles (Ying) Y. Xiong (USATT# 32947)'s rating went from 1899 to 1848 at the LYTTC Friday Pro League event from 11 Aug 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.