This page explains how Ulpiano Santo (USATT# 9719)'s rating went from 1394 to 1350 at the 1999 US Open held on - 4 Jul 1999. 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.