This page explains how Jonathan Santamaria (USATT# 211745)'s rating went from 2173 to 2131 at the Butterfly 2024 February BTTC Tournament held on 9 Feb 2024 - 11 Feb 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.