This page explains how Brenda K K Nguyen (USATT# 80114)'s rating went from 1480 to 1455 at the Minnesota Saturday Open event from 19 Nov 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.