This page explains how Mabel Mu (USATT# 274788)'s rating went from 465 to 427 at the ICC - Sunday Beginners League event from 11 Feb 2024. 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.