This page explains how Chettra Ly (USATT# 1688)'s rating went from 1820 to 1816 at the Spttc Saturday Night League event from 18 Sep 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.