This page explains how John Schlegel (USATT# 16171)'s rating went from 1268 to 1331 at the Schaumburg TT 12th Anniversary held on - 25 Apr 1998. 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.