This page explains how E. Gene Treneer (USATT# 10650)'s rating went from 1237 to 1233 at the Portland Open held on - 19 Aug 1995. 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.