This page explains how Alejandro Ramos Rosario (USATT# 1177876)'s rating went from 1852 to 1889 at the Carmel Barrau International Tournament held on 15 Dec 2023 - 17 Dec 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.