This page explains how Brian Poore (USATT# 61237)'s rating went from 1477 to 1408 at the 2021 Butterfly Sandhills Open held on 7 May 2021 - 9 May 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.