This page explains how Dariah Feng (USATT# 224231)'s rating went from 2030 to 1949 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.