This page explains how Neil B. Ackerman (USATT# 3749)'s rating went from 1987 to 1989 at the US Teams held on - 27 Nov 1994. 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.