This page explains how Harry Xin He (USATT# 81571)'s rating went from 1793 to 1787 at the Alabama State Championships 2015 held on - 16 May 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.