This page explains how Nathan A Crabtree (USATT# 95450)'s rating went from 1166 to 1154 at the 2015 Arizona Closed held on - 3 May 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.