Matt Leacock just posted his difficulty ideal on BGG.

Design the game such that:
if a group of people appropriately self-selects a well-defined difficulty setting,
that their odds of success will be about 50/50,

Too bad none of these seven-volume sets were really that great because it’s such a good idea.

A comprehensive, accurate, unbiased, and irrefutable survey of text editors by way of comparison to locations in The Lord of the Rings.