The Tantrix Puzzle Pack combines the best features of Discovery, Solitaire and Match with some amazing new twists. The total number of puzzles is 40, from easy to expert, and includes 26 "card puzzles". It also includes a new version of Solitaire and the "Ultimate Quest".
Ultimate Quest is the hardest Tantrix puzzle to date. With 87 billion combinations, it will take months or even years before anyone in the world finds a perfect solution.