This page explains how John Zuehlke (USATT# 243851)'s rating went from 1998 to 1969 at the NTTC September Open held on - 1 Oct 1995. 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.