This page explains how Xiaofei Ren (USATT# 93563)'s rating went from 1550 to 1580 at the SVTTC Sunday U2000 event from 3 Nov 2014. 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.