This page explains how Jo A. Splistiser (USATT# 10202)'s rating went from 1270 to 1251 at the Valley of the Sun Open held on - 4 Dec 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.