This page explains how Kevin Swan (USATT# 89491)'s rating went from 1683 to 1666 at the 2017 Indiana State Championship held on 29 Apr 2017 - 30 Apr 2017. 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.