The medium level is much more challenging but after playing it a few times, it becomes pretty easy to win, most of the time.
The real challenge (and frustration) starts at the difficult level. As soon as you think you're getting somewhere, WHAM! dealing a new set of cards totally messes up everything. I must have attempted this level several dozen times over the last month or so. It requires tremendous patience and strategy but contrary to what I was beginning to believe, it can be won. Searching the Net for tips certainly helped. One tip I found particularly helpful was to take 5 minute breaks during a game to stretch your legs. When you return to the computer, you notice plays that had been previously overlooked.
If you've never played spider solitaire, give it a try. Caution: It can be addictive!
And this time it was done in 200 moves with a score of 1100 (the previous winning game was won in 284 moves with a score of 1016.)
