This page explains how Sebastian DeFrancesco (USATT# 38930)'s rating went from 1043 to 1010 at the Surf City Open held on - 7 Aug 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.