This page explains how Chettra Ly (USATT# 1688)'s rating went from 1855 to 1820 at the Spttc Saturday Night League event from 7 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.