This page explains how Andrew Zhou (USATT# 202548)'s rating went from 1327 to 1421 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.