This page explains how Neil B. Ackerman (USATT# 3749)'s rating went from 1948 to 1940 at the Macy Block Open held on - 25 Jun 2000. 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.