This page explains how Antonio Mattos (USATT# 1892)'s rating went from 1664 to 1651 at the Milpitas Sports Center event from 10 Dec 2005. 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.