This page explains how Qiumars Hedayatian (USATT# 53347)'s rating went from 2381 to 2382 at the Waltham September Invitational held on - 11 Sep 1994. 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.