This page explains how Matthew Ioffe (USATT# 94630)'s rating went from 1283 to 1281 at the Westchester 2016 October Open held on 29 Oct 2016 - 30 Oct 2016. 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.