This page explains how Hangyu Li (USATT# 84395)'s rating went from 2577 to 2581 at the 2013 Junior Olympics/Junior Nationals held on - 31 Jul 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.