This page explains how Sasha Parfenov (USATT# 79070)'s rating went from 1343 to 1339 at the TWU Open held on - 25 Jul 2009. 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.