This page explains how Arthur B. Chase (USATT# 4790)'s rating went from 1571 to 1620 at the HTTC February RR held on - 22 Feb 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.