This page explains how Yichi Zhang (USATT# 89328)'s rating went from 2620 to 2620 at the Experior Club League event from 19 May 2017. 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.