This page explains how Mark Hazinski (USATT# 915)'s rating went from 2561 to 2556 at the 2015 Butterfly Thanksgiving Teams held on 27 Nov 2015 - 29 Nov 2015. 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.