This page explains how Andrei Ilnitskii (USATT# 216594)'s rating went from 1584 to 1583 at the 2022 US Nationals Northwest Regional Qualification Tournament held on 4 Jun 2022 - 5 Jun 2022. 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.