This page explains how Jianfeng Qiu (USATT# 215262)'s rating went from 545 to 495 at the SVTTC Sunday U2000 event from 8 Jan 2017. 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.