This page explains how Rachel Purwar (USATT# 1168381)'s rating went from 1777 to 1763 at the ICC - Sunday Beginners League event from 15 Aug 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.