This page explains how Arthur R. Theroux (USATT# 62388)'s rating went from 1583 to 1544 at the Bay State Holiday Open held on - 11 Jan 1997. 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.