This page explains how Quang Nguyen (USATT# 219494)'s rating went from 1786 to 1757 at the 2019 DFWTT Fall League event from 21 Sep 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.