This page explains how Adam Fan (USATT# 217518)'s rating went from 1204 to 1201 at the HCTT Circuit held on 7 Sep 2019 - 7 Sep 2019. 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.