Double Canfield is Canfield with a second deck shuffled in. Thirteen cards go into a reserve with only the top one in play; one card is turned to start the foundations, and its rank is the base for all eight of them; five columns of a single card build down in alternating colours; and the stock turns three at a time with unlimited redeals. Two decks mean two foundations per suit, and 104 cards to bank before you win.
Shuffle two decks together. Deal thirteen cards face down into a reserve and turn the top one. Turn one card to the first foundation — whatever rank it shows is the base rank for every foundation. Deal five columns of one card each. The remaining eighty-five cards form the stock.
Canfield is a game about the reserve, and Double Canfield doubles what is around it without touching it: thirteen cards still block the board, but there are now two of every host and two homes for every card. Play for the reserve first and let the second deck do the rest.
Double Canfield is the two-deck member of the Canfield line: everything else — the thirteen-card reserve, the turned base card, the wrap, the three-card draw with unlimited passes — is Canfield's own. Triple Canfield goes on to three decks and a 26-card reserve. Deuces, Pluto and Quadrangle share the two-deck board and the wrapping foundations but drop the reserve.
Double Canfield runs in your browser — free, no download, no sign-up. Install it as an app on your phone or computer and it works offline. You get unlimited undo, a hint button that names a legal move, statistics that track your wins and times, and seeded deals: every game has a seed you can replay, so a board you enjoyed (or lost) can be played again exactly.
Only the deck count. Two decks give eight foundations, two of every card, and 104 cards to bank; the columns go from four to five. The reserve is still thirteen cards, the base is still a turned card, and the stock still turns three at a time forever.
The rank of the first card turned to a foundation. Every foundation starts at that rank and builds up in suit, wrapping past the king to the ace, so a base of 9 ends at 8.
Two decks mean two of each suit. Each suit builds on two foundations, both from the base rank, and either accepts the next card of that suit.
Not while the reserve holds cards. The reserve fills a space the moment it opens. Once the reserve is empty, a space is yours to fill with any card or run.
Unlimited. When the stock is empty, click it to turn the waste over and keep going. Three cards turn at a time, so playing one card shifts the order on the next pass.