This page explains how John Scarnato (USATT# 21167)'s rating went from 839 to 837 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.