This page explains how Richard R. Mercado (USATT# 20058)'s rating went from 1504 to 1444 at the 2000 San Francisco Summer Open held on - 20 Aug 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.