This is a score based Solitaire, however like most solitaire it can be very unwinnable- the note is that you get a score even if it is unwinnable.. but here's the catch. You don't get notified if there is no more moves, and each time you cycle through your cards in the deck, you lose points when you start from the top, which of course means if you cycle through even once, your score is going down. The fact of the matter is, this is an exceptionally challenging yet rewarding Solitaire, for once that is. Most of the time it's either win or lose, but with this one, you can even gauge your losses in terms of effectiveness. This is definitely worthwhile in the end.