This page explains how Yu-Chan Chang (USATT# 92050)'s rating went from 1930 to 1927 at the 2016 Teams South held on 30 Jul 2016 - 31 Jul 2016. 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.