This page explains how Sihai Chen (USATT# 75555)'s rating went from 1251 to 1255 at the Mohawk Valley TTC League event from 30 Jul 2007. 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.