This page explains how Trung Nguyen (USATT# 198533)'s rating went from 1658 to 1642 at the BTTC League event from 11 Jan 2018. 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.