This page explains how Lucia Sun (USATT# 230237)'s rating went from 2046 to 1996 at the ICC - Sunday Beginners League event from 8 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.