This page explains how Greg Gennuso (USATT# 87802)'s rating went from 2055 to 2047 at the Butterfly 2020 February BTTC Tournament held on 21 Feb 2020 - 23 Feb 2020. 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.