This page explains how Samuel Medina (USATT# 83569)'s rating went from 1560 to 1551 at the GHTTC November 2012 Open held on - 18 Nov 2012. 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.