This page explains how Ronald Lusk (USATT# 967)'s rating went from 1855 to 1865 at the 2009 Aurora Spring Open Tourna held on - 22 Mar 2009. 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.