15 Dec 2019 - 15 Dec 2019
This page explains how Rafael Lizardo (USATT# 22170)'s rating went from 2158 to 2125 at the Butterfly 2019 December BTTC Open Tournament held on 15 Dec 2019 - 15 Dec 2019. The links below take you to pages that describe various aspects of the ratings processor.
The ratings 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.