This page explains how Sara (yang Li-C Potter (USATT# 93851)'s rating went from 598 to 598 at the 2021 Butterfly 2-Person Teams Round Robin Tournament held on 14 Aug 2021 - 15 Aug 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.