This page explains how Santiago Alejandro Acosta (USATT# 218921)'s rating went from 2287 to 2257 at the NYISC July 2023 Open held on 22 Jul 2023 - 22 Jul 2023. 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.