This page explains how Marcos Monzon (USATT# 8580)'s rating went from 1727 to 1649 at the LYTTC Friday Pro League event from 15 Dec 2017. 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.