This page explains how Gerald Chang (USATT# 24456)'s rating went from 1638 to 1638 at the Lily Yip TT Ctr Feb Open - Kam Man Cup held on - 13 Feb 2011. 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.