This page explains how Arthur B. Chase (USATT# 4790)'s rating went from 1553 to 1562 at the Harlingen Spring Open RR held on - 7 Mar 1998. 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.