This page explains how William H. Durbin (USATT# 17486)'s rating went from 1027 to 1040 at the Orlando Winter Open held on - 31 Jan 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.