This page explains how Richard G. Tompson (USATT# 10615)'s rating went from 1861 to 1868 at the St. Louis Gateway Open held on - 17 Aug 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.