This page explains how John Vrabel (USATT# 10854)'s rating went from 926 to 923 at the 2005 PA State Championship (Cl held on - 17 Apr 2005. 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.