This page explains how Robert Simmons (USATT# 5034)'s rating went from 1328 to 1362 at the St. Louis Gateway Open held on - 9 Aug 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.