This page explains how Qi Guo (USATT# 80876)'s rating went from 1897 to 1942 at the 15th FIT Open held on - 6 Nov 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.