A Decktet solitaire game.
The goal of the game is to create a stack of cards all sharing a suit and running from Ace to Crown.
The game involves turning cards over (three at a time), using them to start up to three resource piles that start with the crown, stepping down in rank towards ace (one rank at a time) cards in each resource pile may NOT share a suit symbol with the previous top card in the resource pile. When the player decides (and the Ace is available), the player may start the Tower using an Ace and build up from there.
The player is given unlimited passes through the deck, but the designer believes that winning is "pretty damn rare".