This page explains how Hai He (USATT# 80044)'s rating went from 1623 to 1615 at the 2011 Roosevelt Island Open held on - 25 Jun 2011. 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.