This page explains how Jane Parrish (USATT# 75309)'s rating went from 838 to 728 at the TCTTA Fall Open Double RR held on - 25 Oct 2009. 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.