This page explains how William H. Mobley (USATT# 8424)'s rating went from 1865 to 1868 at the Atlanta Giant RR held on - 13 Nov 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.