This page explains how Nicholas Prou Senturia (USATT# 221166)'s rating went from 1821 to 1791 at the Butterfly Texas Summer Open held on 10 Jun 2023 - 10 Jun 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.