This page explains how Zichun Shen (USATT# 272586)'s rating went from 613 to 613 at the ICC - Sunday Beginners League event from 20 Feb 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.