This page explains how Gary D. Harbeck (USATT# 6425)'s rating went from 2026 to 2030 at the Orlando Winter Open held on - 3 Feb 2002. 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.