This page explains how Brian Bartley (USATT# 54303)'s rating went from 1885 to 1909 at the SpinBlock Monday Night League event from 20 Dec 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.