This page explains how Kenny Duong Au (USATT# 223163)'s rating went from 800 to 825 at the ICC - Sunday Beginners League event from 16 Sep 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.