This page explains how Dmitry Ryvkin (USATT# 29479)'s rating went from 1780 to 1804 at the Pensacola Winter Open 2009 held on - 10 Jan 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.