This page explains how Diann Darnall (USATT# 33603)'s rating went from 1541 to 1473 at the 2015 Butterfly Cary Cup Championship held on - 22 Mar 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.