This page explains how Maggie Yan (USATT# 217205)'s rating went from 1680 to 1678 at the Spttc Wednesday night league event from 31 Jul 2019. 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.