This page explains how Doug Pryce (USATT# 862)'s rating went from 1556 to 1551 at the Nashua TTC RR Open held on - 19 Sep 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.