This page explains how Qi Guo (USATT# 80876)'s rating went from 1840 to 1857 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.