This page explains how Dewei Sun (USATT# 82242)'s rating went from 1551 to 1551 at the ICC Juniors and Adults League event from 30 Jun 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.