This page explains how Sid Stansel (USATT# 10232)'s rating went from 1615 to 1590 at the 1999 Huntsman World Senior Gam held on - 15 Oct 1999. 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.