This page explains how Xujing Zhang (USATT# 199299)'s rating went from 950 to 927 at the ICC - Sunday Beginners League event from 15 May 2016. 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.