This page explains how Mohammed Yasin Musthafa (USATT# 219888)'s rating went from 1464 to 1444 at the ICC - Sunday Beginners League event from 17 Oct 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.