This page explains how Tom A. Sacra (USATT# 54376)'s rating went from 1453 to 1446 at the Friendship Cup event from 8 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.