Windmill is a solitaire

Solitaire

Solitaire is any tabletop game which one can play by oneself or with other people. The solitaire card game Klondike is often known as simply Solitaire....

 card game played with two decks of playing card

Playing card

A playing card is a piece of specially prepared heavy paper, thin cardboard, plastic-coated paper, cotton-paper blend, or thin plastic, marked with distinguishing motifs and used as one of a set for playing card games...

s. It is so called because the initial layout resembles a windmill

Windmill

A windmill is a machine which converts the energy of wind into rotational energy by means of vanes called sails or blades. Originally windmills were developed for milling grain for food production. In the course of history the windmill was adapted to many other industrial uses. An important...

's sails.

First, an ace is placed at the center. Then eight cards are placed around in such a way that the layout looks like a cross. The ace forms the primary foundation and the eight cards form the reserve. The gaps at the corner of the "sails" are reserved for kings and form the secondary foundations. The suits of the kings to be placed on the secondary foundations are disregarded. The object of the game is to build the primary foundation up to king with 52 cards in it and the secondary foundations down to ace with 13 cards each in them. All foundations are built regardless of suit.

The illustration below shows how the tableau is initially laid out. (A) is for the primary foundation, R for the reserve (8 free cells) and (K) for the secondary foundations, empty at first.

		R
	(K)	R	(K)
R	R	(A)	R	R
	(K)	R	(K)
		R

Game starts by moving cards from the reserve to either the primary foundation or if available, either one of the secondary foundations. Gaps at the reserve can be filled by cards from the wastepile, or if the empty, from the stock. If no more moves are possible from the reserve, the player deals the cards from the stock one at a time to search for applicable cards. The player can also move a card from a secondary foundation to the primary foundation provided that the next card to be placed at the primary foundation must come from the wastepile or the reserve.

When the primary foundation reaches a king, an ace can be placed over it. But when a secondary foundation reaches an ace, it can longer be built unless the ace is moved to the primary foundation.

The game is won when all cards are in the foundations, with 52 on the primary foundation and 13 on each of the four secondary foundations.

There is also an alternate variation wherein the direction of building in the primary and secondary directions are reversed. In this variation, the primary foundation starts with a laid-out king and is built down while the secondary foundations should start with aces and are built up.