This page explains how Glen Randmer (USATT# 34796)'s rating went from 1427 to 1419 at the Westchester 2015 December Open held on 27 Dec 2015 - 28 Dec 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.