This page explains how Chad Wilkins (USATT# 85826)'s rating went from 1634 to 1621 at the 2014 Butterfly Atlanta Winter Open held on - 1 Feb 2014. 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.