This page explains how Margie Alley (USATT# 1166430)'s rating went from 812 to 812 at the Westchester April 2021 Little Open 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.