This page explains how Dongyong Zhou (USATT# 87743)'s rating went from 1922 to 1898 at the 2015 Joola Teams West held on - 30 Aug 2015. 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.