This page explains how Gloria Jeng (USATT# 229610)'s rating went from 690 to 687 at the MDTTC Tuesday/Friday League event from 25 Jan 2019. 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.