This page explains how Amin Ghafourian (USATT# 283380)'s rating went from 627 to 566 at the 888 League event from 12 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.