This page explains how David C. Dickson (USATT# 5365)'s rating went from 1548 to 1544 at the 2011 PA State Championships held on - 10 Apr 2011. 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.