This page explains how Stu Sinykin (USATT# 3841)'s rating went from 1800 to 1781 at the Minnesota Saturday Open event from 23 Mar 2013. 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.