This page explains how Andriy Hrishin (USATT# 87894)'s rating went from 1857 to 1849 at the Westchester 2013 September Open held on - 29 Sep 2013. 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.