This page explains how Dat Nguyen (USATT# 76313)'s rating went from 1897 to 1868 at the Austin Table Tennis League event from 13 Nov 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.