This page explains how Samson Dubina (USATT# 9051)'s rating went from 1881 to 1987 at the 1999 AAU/Nationals held on - 6 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.