This page explains how Merr W. Trumbore (USATT# 10675)'s rating went from 1797 to 1789 at the 9th Annual Holiday Classic held on - 18 Jan 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.