This page explains how H. B. Barlow (USATT# 44982)'s rating went from 1313 to 1311 at the Sun City Open Senior TTT held on - 1 May 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.