This page explains how Brian Wu (USATT# 223599)'s rating went from 1791 to 1790 at the LYTTC December Giant RR Open held on 11 Dec 2021 - 12 Dec 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.