This page explains how Roberto R. Saria (USATT# 62622)'s rating went from 1639 to 1790 at the 1999 Decatur Open held on - 21 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.