This page explains how Zezheng (Eric) Wang (USATT# 75504)'s rating went from 1840 to 1820 at the LATTF event from 14 Apr 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.