This page explains how Perry Smith (USATT# 27885)'s rating went from 1615 to 1556 at the 2012 Lindenwood September Open held on - 23 Sep 2012. 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.