This page explains how Shakthi Sriman Nandhakumar (USATT# 270851)'s rating went from 1107 to 1007 at the ICC - Sunday Beginners League event from 19 Sep 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.