This page explains how Jane Parrish (USATT# 75309)'s rating went from 870 to 873 at the Spttc Saturday Night League event from 31 Jul 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.