This page explains how Carlos I. I. Estrada (USATT# 39831)'s rating went from 1925 to 1922 at the Butterfly January 2022 BTTC Open Tournament held on 29 Jan 2022 - 30 Jan 2022. 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.