This page explains how Thomas Sawner (USATT# 71226)'s rating went from 1893 to 1881 at the Butterfly MDTTC October Open held on - 27 Oct 2013. 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.