This page explains how Carlos Zeller (USATT# 65087)'s rating went from 1815 to 1800 at the December 09 Broward TTO held on - 6 Dec 2009. 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.