This page explains how William Collier (USATT# 22335)'s rating went from 1678 to 1692 at the Piedmont Open held on - 1 Jun 2002. 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.