This page explains how Hasan Saidov (USATT# 215306)'s rating went from 2358 to 2339 at the Westchester 2021 December Open held on 29 Dec 2021 - 30 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.