This page explains how Michael Walk (USATT# 10888)'s rating went from 2189 to 2169 at the 2016 Butterfly Thanksgiving Teams held on 25 Nov 2016 - 27 Nov 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.