This page explains how Chad Su (USATT# 86446)'s rating went from 1879 to 1891 at the 2017 BTTC Summer Open held on 10 Jun 2017 - 11 Jun 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.