This page explains how Diann Darnall (USATT# 33603)'s rating went from 1480 to 1458 at the Huntsman World Senior Games held on 3 Oct 2016 - 6 Oct 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.