This page explains how Kiwi Yang (USATT# 271690)'s rating went from 1898 to 1872 at the 888 League event from 12 Dec 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.