This page explains how Zhongxu An (USATT# 93512)'s rating went from 1897 to 1886 at the 2015 DFWTT Spring Open held on - 13 Jun 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.