This page explains how Jim Keep (USATT# 7519)'s rating went from 1870 to 1840 at the Michigan Closed TT Championshi held on - 6 Apr 2003. 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.