This page explains how Long Xiao (USATT# 152922)'s rating went from 1727 to 1687 at the SVTTC Sunday U2000 event from 22 Dec 2013. 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.