This page explains how Ronald Joseph Arcaro (USATT# 3920)'s rating went from 1521 to 1520 at the Sun TV Canton Open held on - 22 Mar 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.