This page explains how Ilya Rozenblat (USATT# 75076)'s rating went from 1898 to 1888 at the 2009 MO Winter Games Open held on - 28 Feb 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.