This page explains how Al L. Papp (USATT# 13193)'s rating went from 1466 to 1451 at the Daly City Mayoral Trophy held on - 26 Sep 1999. 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.