This page explains how Sang Nguyen (USATT# 270136)'s rating went from 1683 to 1678 at the Essential Table Tennis OKC event from 20 May 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.