This page explains how Chenguang Zhu (USATT# 91100)'s rating went from 1569 to 1609 at the SVTTC Sunday U2000 event from 30 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.