This page explains how Louis R. Alamina (USATT# 20580)'s rating went from 1750 to 1733 at the 2017 San Antonio Fall Open held on 30 Sep 2017 - 1 Oct 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.