This page explains how Sihai Chen (USATT# 75555)'s rating went from 1379 to 1378 at the Mohawk Valley TTC League event from 3 Mar 2009. 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.