This page explains how Roderick Medina (USATT# 74961)'s rating went from 1256 to 1239 at the Austin Table Tennis League event from 17 Dec 2013. 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.