This page explains how Hugo Su (USATT# 13014)'s rating went from 1987 to 2007 at the Butterfly April 2018 BTTC Open held on 14 Apr 2018 - 15 Apr 2018. 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.