This page explains how Maria Sirakova (USATT# 219764)'s rating went from 2020 to 2001 at the Experior Club League event from 29 Dec 2017. 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.