This page explains how Ziqi Calista Zhang (USATT# 271326)'s rating went from 459 to 455 at the 888 League event from 9 Oct 2022. 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.