This page explains how Alton Zhao (USATT# 273085)'s rating went from 844 to 850 at the ICC - Sunday Beginners League event from 21 Aug 2022. 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.