This page explains how Raymond F. Chen (USATT# 4809)'s rating went from 1367 to 1352 at the 2011 Potomac Fall Open held on - 19 Nov 2011. The links below take you to pages that describe various aspects of the ratings processor.

The ratings 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.