This page explains how Guangwei Zhou (USATT# 276082)'s rating went from 1368 to 1315 at the Westford TTC June 2023 Open held on 11 Jun 2023 - 11 Jun 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.