This page explains how Blair W. Wilson (USATT# 69613)'s rating went from 1567 to 1554 at the 2015 Butterfly Atlanta Spring Open held on - 7 Feb 2015. 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.