This page explains how Haijun Zhao (USATT# 214612)'s rating went from 2063 to 2050 at the Boston TTC event from 18 Oct 2016. 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.