This page explains how Lee E. Sumner (USATT# 48064)'s rating went from 1690 to 1669 at the Maryland June Circuit held on - 6 Jun 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.