This page explains how Ricardo Brito (USATT# 80953)'s rating went from 1578 to 1568 at the LYTTC Friday Pro League event from 29 Apr 2013. 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.