This page explains how Chenguang Zhu (USATT# 91100)'s rating went from 1661 to 1669 at the SVTTC Sunday U2000 event from 5 Apr 2015. 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.