This page explains how Marcos Monzon (USATT# 8580)'s rating went from 1664 to 1662 at the LYTTC Friday Pro League event from 20 Apr 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.