This page explains how Henry Chen (USATT# 25459)'s rating went from 1088 to 1188 at the Potomac 2007 Fall Open held on - 11 Nov 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.