This page explains how Frank C. Heller (USATT# 6566)'s rating went from 1541 to 1519 at the Bartlesville Summer Open held on - 14 Jun 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.