Difficulty: Each game is ranked as follows. 1 = Child's play 2 = Brainpower optional 3 = A pleasant challenge 4 = Difficult for mere mortals 5 = Get in your MENSA™* application
Play Formats: O - Online Play: These games must be played while connected to the World Wide Web.
P - Pencil Play: These games are available in a printer friendly format for play with analog graphite instruments (aka pencils).
* Mensa is a registered trademark of American Mensa, Ltd.
