This page explains how Joseph Sabas (USATT# 146)'s rating went from 1560 to 1530 at the Star of the North Winter Sport held on - 1 Feb 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.