This page explains how Aleksandr Itunin (USATT# 77651)'s rating went from 1300 to 1337 at the John Jorgensen League event from 30 May 2004. 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.