This page explains how Kagan Feng (USATT# 218625)'s rating went from 1899 to 1868 at the ICC - Advanced League event from 19 Jun 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.