This page explains how Robert DeWitt (USATT# 16584)'s rating went from 891 to 907 at the Macy Block Open (formerly Sun held on - 22 Aug 1999. 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.