This page explains how Erdenechimeg Haltarhuu (USATT# 92990)'s rating went from 689 to 646 at the 2016 Minnesota State Championships held on 30 Jan 2016 - 31 Jan 2016. 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.