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Most Difficult Solitaire Games. Four of the Most Difficult Solitaire Games in the World: Canfield, Forty Thieves, Scorpion and Spider Four Suits with a user-friendly interface and top quality graphics and animations!
Not all Solitaire games are winnable, but the great majority is. On average, around 80% of every Solitaire game is winnable. FreeCell is the variant with the best odds, as around 99% of all games are winnable, for instance.