This page explains how Dongyong Zhou (USATT# 87743)'s rating went from 1918 to 1915 at the LATTA Open September 2014 held on - 6 Sep 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.