Derrick Cone
USATT#: 64672
1964 1939
2009 Summer Grand Canyon State
- 21 Jun 2009
- 21 Jun 2009
This page explains how Derrick Cone (USATT# 64672)'s rating went from 1964 to 1939 at the 2009 Summer Grand Canyon State held on - 21 Jun 2009. The links below take you to pages that describe various aspects of the rating processor.
Introduction
Initial Rating
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.