This page explains how Ray Aker (USATT# 305)'s rating went from 1134 to 1122 at the Butterfly MDTTC April Open held on - 7 Apr 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.