This page explains how Amin Ghafourian (USATT# 283380)'s rating went from 658 to 653 at the 888 League event from 5 May 2024. 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.