This page explains how Jamo Parrish (USATT# 75310)'s rating went from 1321 to 1260 at the Spttc Saturday Night League event from 10 Mar 2018. 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.