This page explains how Abdul Syed Musthafa (USATT# 1167093)'s rating went from 698 to 663 at the ICC - Sunday Beginners League event from 7 Apr 2019. 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.