This page explains how Dianren Wei (USATT# 212195)'s rating went from 2672 to 2647 at the ICC JOOLA Fall Open 2021 held on 28 Aug 2021 - 29 Aug 2021. 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.