This page explains how Trung Nguyen (USATT# 198533)'s rating went from 1843 to 1840 at the BTTC League event from 3 May 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.