This page explains how Marco J. Borrillo (USATT# 59455)'s rating went from 1834 to 1976 at the California State Open held on - 29 Jun 2003. 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.