This page explains how Clark Tatum (USATT# 14519)'s rating went from 1533 to 1531 at the 1998 Texas Open held on - 28 Jun 1998. 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.