This page explains how Eugene Zhang (USATT# 215719)'s rating went from 1530 to 1422 at the MDTTC August Open held on 7 Aug 2021 - 8 Aug 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.