This page explains how Trey Aughenbaugh (USATT# 79731)'s rating went from 1563 to 1558 at the February Open held on - 26 Feb 2011. 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.