This page explains how Felipe Alejandro Osorio (USATT# 84726)'s rating went from 1956 to 1981 at the LYTTC Friday Pro League event from 19 Jul 2019. 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.