This page explains how Robert Sun (USATT# 92671)'s rating went from 2163 to 2158 at the 2021 Washington State Rating Events held on 24 Apr 2021 - 25 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.