Talk:Difficulty and Terrain Ratings
The rating system is hosted on ClayJar's site and was developed by ClayJar, Markwell, and Brokenwing.
Is it really GC.com's rating system?
Look at the credits again. I also had a hand in it. It was discussed on gc.com's forums, with Markwell and I perhaps doing the most wordsmithing. Brokenwing first captured it in code and Clayjar hosted it on his Web server. It is not gc.com's rating system. It is available for all to use. -- Scout