This page explains how Tay Nguyen (USATT# 83113)'s rating went from 1634 to 1609 at the Champaign Spring Open Giant Round Robin held on - 11 Apr 2015. 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.