This page explains how Eric Zheng (USATT# 35038)'s rating went from 1841 to 1814 at the Westchester 2012 December Open held on - 16 Dec 2012. 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.