This page explains how Carl Simons (USATT# 19583)'s rating went from 1251 to 1250 at the Florida One Day RR held on - 19 Feb 2000. 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.