This page explains how Andrei Zanko (USATT# 203165)'s rating went from 1585 to 1583 at the NYISC February 2023 Open held on 11 Feb 2023 - 11 Feb 2023. 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.