This page explains how Frank A. Arias (USATT# 77664)'s rating went from 2138 to 2137 at the Butterfly 2018 August BTTC Open Tournament held on 11 Aug 2018 - 12 Aug 2018. 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.