This page explains how Carlos Zeller (USATT# 65087)'s rating went from 1888 to 1889 at the Heart of FL Open held on - 17 Sep 2005. 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.