This page explains how Raymond J. Sacco (USATT# 11297)'s rating went from 1851 to 1847 at the 48th Robo-Pong St. Joseph Valley Open held on - 11 Mar 2012. 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.