This page explains how Qiang Zhao (USATT# 25755)'s rating went from 1535 to 1519 at the Pong Club - South Austin event from 7 Jan 2016. 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.