This page explains how Ilya Koshkin (USATT# 14637)'s rating went from 1663 to 1671 at the LATTF event from 5 Dec 2010. 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.