This page explains how David C. Dickson (USATT# 5365)'s rating went from 1550 to 1548 at the 2010 PA State Championships (Closed) held on - 11 Apr 2010. 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.