This page explains how Thomas Sawner (USATT# 71226)'s rating went from 1921 to 1920 at the Butterfly Cary Cup held on - 16 Mar 2014. 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.