This page explains how Fiona Dubina (USATT# 214975)'s rating went from 680 to 671 at the 2020 Arnold Table Tennis Challenge held on 6 Mar 2020 - 8 Mar 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.