| Coach Level: State | Certified Umpire
17 Jul 2021
This page explains how Changping Duan (USATT# 49379)'s rating went from 2234 to 2127 at the Spttc Saturday Night League event from 17 Jul 2021. The links below take you to pages that describe various aspects of the ratings processor.
The ratings 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.