This page explains how Kagan Feng (USATT# 218625)'s rating went from 575 to 563 at the ICC - Sunday Beginners League event from 31 Dec 2017. 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.