This page explains how Harrison Ngo (USATT# 89471)'s rating went from 1454 to 1372 at the 2013 Butterfly Atlanta Winter Open held on - 2 Feb 2013. 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.