This page explains how John Dart (USATT# 15534)'s rating went from 1599 to 1600 at the Meiklejohn National Seniors TT held on - 13 Jun 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.