This page explains how Matt Pugmire (USATT# 74254)'s rating went from 1512 to 1422 at the Maryland Giant Round Robin held on - 18 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.