With 10 numbered hexagonal-shaped tiles per set, the object of Tantrix puzzles is to create a continuous loop of unbroken color that runs through all intersecting tiles. Starting with the tiles marked 1, 2, 3 on the back, each time a tile is added (in numerical sequence) into the puzzle mix, the color of loop changes and the more challenging Tantrix becomes. FYI – the record stands at 500 tiles or 50 sets!