This page explains how Andrei Ilnitskii (USATT# 216594)'s rating went from 1583 to 1531 at the SPTTC SEPTEMBER GIANT RR & DOUBLES TOURNAMENT held on 24 Sep 2022 - 25 Sep 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.