This page explains how Gustavo Gutierrez (USATT# 82416)'s rating went from 1230 to 1228 at the Westchester 2015 June Open held on - 28 Jun 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.