This page explains how Janusz Franeczek (USATT# 26185)'s rating went from 2141 to 2131 at the 2016 Butterfly Badger Open held on 16 Sep 2016 - 18 Sep 2016. 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.