This page explains how Gustavo Arango (USATT# 1180062)'s rating went from 1391 to 1369 at the 2023 Thanksgiving Grand Round Robin held on 4 Nov 2023 - 4 Nov 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.