This page explains how Bella Goodwin (USATT# 92549)'s rating went from 1869 to 1848 at the ICC - Advanced League event from 28 Nov 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.