This page explains how Andrew Cao (USATT# 211982)'s rating went from 2222 to 2213 at the 2021 US National TT Championships Texas State Qualifier held on 16 Apr 2021 - 18 Apr 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.