This page explains how Aaron Chang (USATT# 93504)'s rating went from 1839 to 1823 at the First Annual Capital Plastics Butterfly US Youth Tournament held on 14 Oct 2017 - 15 Oct 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.