This page explains how Prasith (sith) Bounkeo (USATT# 73584)'s rating went from 1785 to 1781 at the Minnesota Saturday Open event from 27 Sep 2011. 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.