This page explains how Mike John Grassel (USATT# 1165202)'s rating went from 1383 to 1324 at the 2019 Badger Open held on 20 Sep 2019 - 22 Sep 2019. 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.