Comments/Ratings for a Single Item

Since chess involves an interaction of at least two 'minds', one problem
may be trying to simulate the missing opponent. Man-vs-computer does a
pretty good job of creating a solitaire!

Rule-based moves (as in Chess Patience) or fixed, ordered lists of pieces
to move have been tried, but they lack the 'feel' of chess competition.
Problem solving (timed, possibly competitive, etc.) is a decent try at
creating a solitary chess-like activity.

Thanks for your response. But ... someone can argue that for Bridge we need
4 brains, and for Cribbage we need 2 brains. But it doesn't prevent 
composers to create hundreds of card solitaires. Anyway, thank you.
Andy Lewicki.