This page explains how Nicole Deng (USATT# 203171)'s rating went from 629 to 627 at the MDTTC Tuesday/Friday League event from 13 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.