This page explains how Chuo-Han Lee (USATT# 214617)'s rating went from 709 to 661 at the ICC - Sunday Beginners League event from 2 Oct 2022. 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.