This page explains how Gary D. Harbeck (USATT# 6425)'s rating went from 1983 to 1981 at the FL Orange Blossom TT Series Spring Classic 2014 held on - 3 May 2014. 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.