This page explains how Alex Kotlyar (USATT# 21222)'s rating went from 1622 to 1613 at the Indiana State Championships 2021 held on 1 May 2021 - 2 May 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.