This page explains how Marcos Monzon (USATT# 8580)'s rating went from 1661 to 1656 at the LYTTC Friday Pro League event from 13 Dec 2015. 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.