This page explains how Mabel Mu (USATT# 274788)'s rating went from 203 to 197 at the ICC - Sunday Beginners League event from 19 Feb 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.