This page explains how Roman Guhr (USATT# 60509)'s rating went from 1995 to 1985 at the One Day RR held on - 10 Oct 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.