This page explains how Ed Warwick (USATT# 10943)'s rating went from 1563 to 1553 at the Arizona Sizzler Giant RR held on - 31 Jul 1999. 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.