This page explains how Marc Villanueva (USATT# 28463)'s rating went from 1690 to 1685 at the Chicago Land Area Singles League event from 20 Feb 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.