This page explains how Yu Cheung (USATT# 276930)'s rating went from 1808 to 1798 at the Charleston Winter Round Robin held on 10 Dec 2023 - 10 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.