This page explains how Qiumars Hedayatian (USATT# 53347)'s rating went from 2429 to 2430 at the Waltham May Open RR held on - 1 Jun 1997. 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.