This page explains how Maggie Yan (USATT# 217205)'s rating went from 1878 to 1830 at the Spttc Saturday Night League event from 22 Feb 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.