This page explains how Ewan Zhang (USATT# 264897)'s rating went from 1571 to 1591 at the ICC JOOLA Winter Open held on 3 Dec 2022 - 4 Dec 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.