This page explains how Grigoriy Yasinov (USATT# 30117)'s rating went from 1792 to 1791 at the Maryland Giant RR held on - 20 Jun 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.