This page explains how WILLIAM C. HALL (USATT# 6378)'s rating went from 1812 to 1792 at the AITTA event from 11 Mar 2012. 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.