This page explains how Jeff Pratt (USATT# 81159)'s rating went from 875 to 879 at the DFWTT Spring Open held on - 15 Jun 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.