This page explains how Karl Sejkora (USATT# 9881)'s rating went from 1362 to 1321 at the Huntsman World Senior Games held on - 17 Oct 1997. 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.