This page explains how David C. Dickson (USATT# 5365)'s rating went from 1569 to 1563 at the PA State Championship (Closed) held on - 20 Apr 2008. 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.