This page explains how Eon S S Chang (USATT# 93642)'s rating went from 1960 to 1943 at the Homenetmen Ararat Open held on 22 Jun 2019 - 23 Jun 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.