This page explains how Merr W. Trumbore (USATT# 10675)'s rating went from 1885 to 1828 at the Maryland Circuit held on - 7 Mar 2004. 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.