This page explains how Gary Stosio (USATT# 76607)'s rating went from 1317 to 1287 at the February Open Giant RR held on - 28 Feb 2009. 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.