This page explains how Robert Seifert (USATT# 15242)'s rating went from 1231 to 1218 at the Texas Wesleyan Open held on - 22 Nov 2008. 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.