6 Peaks Solitaire is TriPeaks with twice the cards: six peaks built from two decks, across fifteen different layouts. The rule is the same and gloriously simple — take any exposed card that is one rank higher or lower than the open card at the bottom, in either direction and regardless of suit.
Doubling the cards changes the strategy more than you'd expect. With two decks in play, the card you need is far more likely to exist somewhere — but so is the trap of clearing the easy side of the board and stranding the other.
It uses two decks and six peaks instead of one deck and three, across fifteen layouts. The core rule — take exposed cards one rank above or below the open card — is unchanged.
No. Only rank matters, which is what makes the TriPeaks family so much faster than Klondike.
Yes — tap cards to take them. Nothing to install.