This page explains how Quang Nguyen (USATT# 219494)'s rating went from 1746 to 1742 at the HITTA Weekly League event from 10 Feb 2021. 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.