This page explains how William D Pollan (USATT# 9143)'s rating went from 1438 to 1348 at the Arkansas Closed held on - 25 Sep 1999. 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.