This page explains how Kevin Zhou (USATT# 82151)'s rating went from 1968 to 2002 at the MDTTC Butterfly October Open 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.