This page explains how Marcos Alves (USATT# 80490)'s rating went from 2138 to 2127 at the DTTL event from 27 Dec 2014. 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.