This page explains how Zhaoqun Zhou (USATT# 4287)'s rating went from 2081 to 2071 at the LYTTC TTcup event from 23 Mar 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.