This page explains how Stephanie Zhang (USATT# 98300)'s rating went from 1459 to 1455 at the MDTTC Tuesday/Friday League event from 29 Sep 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.