This page explains how Corey Mcelveen (USATT# 18230)'s rating went from 1989 to 1988 at the Middle Creek March Open held on - 7 Mar 2009. 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.