This page explains how Kevin Swan (USATT# 89491)'s rating went from 1598 to 1561 at the 2015 Joola Aurora Spring Open held on - 18 Apr 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.