This page explains how David Roberts (USATT# 55604)'s rating went from 2191 to 2157 at the 2014 SPTTC Open held on - 27 Jul 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.