This page explains how James Petrie (USATT# 55556)'s rating went from 1356 to 1314 at the Best of the West Open held on - 19 Aug 2007. 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.