This page explains how Mauricio Castro (USATT# 270009)'s rating went from 1951 to 1950 at the HITTA Weekly League event from 31 Mar 2021. 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.