This page explains how Michael Chen (USATT# 22140)'s rating went from 1939 to 1866 at the Paddle Palace Atlanta Winter GRR held on 6 Nov 2021 - 7 Nov 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.