This page explains how Samson Dubina (USATT# 9051)'s rating went from 2461 to 2453 at the South Shore Sports/Butterfly O held on - 15 Nov 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.