This page explains how Thomas E. Hall (USATT# 6377)'s rating went from 1836 to 1949 at the Grand Rapids Nov. Open held on - 11 Nov 1995. 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.