This page explains how Jo A. Splistiser (USATT# 10202)'s rating went from 1284 to 1270 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.