This page explains how Steven Hamilton (USATT# 88668)'s rating went from 1879 to 1871 at the Westchester 2015 October Open held on - 25 Oct 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.