Play Quadrangle Solitaire Online — Corona With a Turned Base

Quadrangle is Corona with Canfield's opening. Twelve columns of three are dealt face up from two decks, and then one card is turned to a foundation: its rank is the base for all eight foundations, which build up in suit and wrap past the king to the ace. The tableau builds down in suit, wrapping the same way, one card at a time. A space is never yours — it is filled at once from the waste, or from the stock if the waste is empty. One card a turn, one pass, 104 cards to bank.

Setup

Shuffle two decks together. Deal twelve columns of three cards each, all face up. Turn one card to the first foundation; its rank is the base rank for every foundation. The remaining sixty-seven cards form the stock. There is no reserve.

Rules

• Foundations build up in suit from the base rank, wrapping past the king: a base of 10 runs 10, J, Q, K, A, 2 … 9. Each suit has two foundations; either takes its next card.
• Tableau builds down in suit, wrapping past the ace to the king.
• One card at a time. A packed run does not travel.
• Spaces are filled for you — from the top of the waste, or by a card dealt from the stock when the waste is empty.
• Stock: one card a turn to the waste; the top waste card is in play.
• No redeal.
• Win when all eight foundations are complete.

Strategy

Corona's forced fill is the whole character of this game: you cannot make a space, you can only make room for whatever the waste has on top. The turned base adds the Canfield twist that the card one below the base is the last of its suit to move.

• Know which rank is the king. If the base is 10, the nines are the end of every foundation. Never build under a nine; it is going nowhere until its whole suit is banked.
• Watch the waste before you empty a column. The waste's top card lands in the space at once. Empty a column when that card is one you want on the tableau — a base-rank card, or a host for something stuck — and not otherwise.
• An empty waste means a blind fill. With nothing in the waste, the stock deals the filler unseen. Sometimes that is exactly what you want: a free look at the next card without spending a turn.
• Suit runs need their twins. A seven of clubs has only the eights of clubs to land on, but there are two. Before you bury one, find the other.
• Play from the columns first. Thirty-six open cards give you plenty to do before the first turn. One pass through the stock means every card you turn without playing is buried in the waste.
• Bank evenly. Two foundations per suit rising together take two different cards; two at the same rank fight over one.

Where It Sits in the Canfield Family

Quadrangle is Corona — twelve columns of three, single-card moves, the forced fill from the waste, one pass — with two Canfield rules added: a turned base rank and a build that wraps on both sides. Corona lives on the Forty Thieves engine; Quadrangle lives here, on the Canfield engine, for those two rules, with no reserve. Double Canfield keeps the reserve and turns three cards a time; Deuces and Pluto fix the base at the twos.

Other Games to Try

• Corona — the same board with ace foundations and no wrap
• Double Canfield — the turned base with a reserve and unlimited redeals
• Deuces — the base fixed at the twos, spaces yours
• Chameleon — a turned base with the build rule dropped

About This Version

Quadrangle 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.