Canfield Solitaire is a card game played using a 52-card deck of standard playing cards. In some countries, it's known as Demon Solitaire.
It's been estimated by running a solver program that about 70% of all possible Canfield Solitaire games are solvable. However, humans don't fare nearly so well.
For randomly generated games, human players win only about 1 in 30. Of course, by liberally undoing moves and playing only previously won games, a player can do somewhat better.
Legend has it that Canfield Solitaire was originally invented in 1890's and was named after its inventor, Richard Canfield, who became quite wealthy from it. But, no one really knows if this is true or not.
The goal of Canfield Solitaire is to move all of the cards into the foundations.
Canfield Solitaire is played with a 52-card deck of standard playing cards.
When the game starts, 13 cards are placed into the reverse, only the top card of which is visible. In the leftmost foundation is set 1 face-up card, called the base card. Next, 4 face-up cards are sent to the tableau, one per column. The remaining 34 cards are laid face-down into the stock.
The rank of the base card, the base rank, determines the starting rank for all builds in the foundations.
This game allows ranks to be wrapped.
Tableau piles build downward by rank, so wrapping allows a king to be placed onto an ace of the opposite color. However, foundations build upward by rank, so wrapping allows an ace to be placed onto a king of the same suit.
Within the tableau, cards can only be stacked downward in rank by alternate colors. Any number of cards may be taken from the bottom of one pile and placed onto the bottom of another pile. When a column is emptied, as long as the reserve is not empty, the slot is automatically filled with the top reserve card. However, if the reserve is empty, any cards may be placed into a vacant column.
As long as it's a legal move, a card may be played to the tableau from either the reserve pile, the waste pile, or a foundation. A card may be played to the foundations from either the reserve pile, the waste pile, or a tableau pile. If the card shares the base rank then it begins a build, otherwise it must extend a build.
Whenever the player deems it necessary, the stock may be clicked to change the current top waste card. This is usually done when there are no more playable moves, but it doesn't have to be. Canfield allows unlimited passes of the stock, so when it's empty, a single click resets it.
Here are seven gameplay tips on how to beat Canfield:
The game screen is made up of 5 different areas.
The tableau is located in the right-center of the screen. It consists of 4 unmarked columns. Each column generally contains a vertically overlapped pile of one or more face-up cards, but near the end of a game, a column can be empty.
The foundations are located directly above the tableau. Horizontally, it consists of 4 rectangles. Each rectangle is a foundation where a suit can be built downward by rank.
The reserve is located left of the tableau. It consists of a vertical pile of several cards, of which only the top card is face-up (visible) and playable. No card may ever be moved to this area.
Located in the upper-left corner are the stock and waste. They work together to supply one playable card at a time.
The stock is a container for cards that will be put into play as the game progresses. It normally contains a pile of face-down squared cards. The waste is directly to the right of the stock.
Whenever the player clicks on a non-empty stock, 3 cards (or less if only 1 or 2 remain) are dealt from the stock to the waste. Cards in the waste are always face-up, although only the top 3 cards (or 1 or 2 if less remain) will be visible. Only the top card in the waste pile is playable.
There is no limit to the number of passes allowed through the stock. To reset an empty stock, the player must click on it. This causes the entire waste pile to be moved into the stock. In no other way can cards be put into the stock.