This page explains how Dat Nguyen (USATT# 76313)'s rating went from 1889 to 1809 at the Austin Table Tennis League event from 4 Oct 2023. 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.