This page explains how Jack Hetfield (USATT# 2092)'s rating went from 1171 to 1075 at the Robo-Pong St. Joseph Valley Open held on - 2 May 2010. 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.