This page explains how Abbas Oulapour (USATT# 76147)'s rating went from 1431 to 1379 at the 2012 Southern Open on the JOOLA North American Tour held on - 29 Jul 2012. 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.