Solitaires may be grouped together in various ways as follows: • By aim or object (building, pairing or totalling) - see above • By family under their progenitor or best known variant e.g. Klondike or Napoleon at St Helena • By starting information (closed, open, or half-open) and mechanism (building or packing, etc.) - see below Most patience or solitaire games involve building sequences of cards in suit in order in a
family running from ace to king. Normally the ace is the
base card or foundation on which a two of the same suit is placed, followed by a three and so on. This is
building and all such games are, technically, builders. However, in many, the cards must be assembled in reverse order on that part of the layout called the
tableau. They can then be built in the right sequence on the foundations. This intermediate step of reverse building is called
packing, and games using this technique are called "packers". Games that use neither technique are "non-builders". There are also special kinds of packer known as 'blockades', 'planners' and 'spiders'. These games may be classified by the degree to which the cards are revealed. In "open games", all the cards are visible throughout the game and the player has to use powers of analysis to solve the solitaire. In "closed" games, cards are drawn from a face-down stock and the player has to use judgement because the sequence of cards is unknown until they appear. In between is a hybrid group which
David Parlett calls "half-open".
Closed games Closed games are those in which, throughout the game, not all the cards are visible. They require more judgment because the sequence of cards is unknown. As cards appear, if they cannot be played straight away they are put into a wastepile from which they may, potentially, not be accessible again. Closed games are subdivided as follows: •
Simple builders. Typically the aim of a simple builder is to build cards in suit sequence on the Aces which form the foundations. They are 'simple' in that the player has little or no choice in playing and just needs to watch for opportunities to build, any card that cannot be built being discarded to a wastepile where it may, of course, become inaccessible. Cards may be played from the wastepile or the hand and when the hand cards are exhausted it may be possible to 'redeal' by playing through the wastepile, usually for a limited number of times. •
Reserved builders. An elaboration of the simple builder is to deal a number of cards to a 'reserve', thus increasing the number of cards available to play. •
Simple packers. Packers enable cards to be built in reverse sequences on the layout - sometimes called 'auxiliary sequences', before playing them to the foundations in the correct sequence. Building in reverse sequence is known as 'packing'. •
Reserved packers Reserved packers combine the features of having a reserve of cards and also the ability to pack in reverse sequence before laying off to the foundations. •
Non-builders The aim of a non-builder is not to build suit sequences, but some other objective. In many of them the aim is to discard the entire pack or packs by pairing cards of the same rank or adding up to a given number.
Open games In open games, the entire pack of cards is visible at the outset and continue to be visible throughout the game. Games of perfect information, like chess, require careful analysis to achieve success. Open games may be divided into: •
Open builders. A family of builders in which all the cards are faced at the start of play. •
Open packers. Likewise a family of packers in which all the cards are visible at the outset. •
Open non-builders. A branch of open solitaires in which the aim is other than build suit sequences.
Half-open games Half-open games are those which start 'closed' and become 'open' as the game progresses. They may be divided as follows: •
Half-open builders. These are games where the aim is to build up suit sequences without the help of packing in reverse order first. Unlike simple builders, there is no wastepile, but cards are added to the layout if they cannot be built until the game reaches a point where all the unbuilt cards are visible and the game becomes one of analysis. •
Blockades. A small family of builders named after
British Blockade in which the cards are only available if there is no card below (or sometimes above) it. •
Planners. A large family of builders with a high skill level. Cards are played to the foundations or to several wastepiles, the top cards of which are always available to play. •
Half-open packers. These are packers where, during the course of the game, all the remaining cards eventually become visible. •
Spiders. A small family of games named after
Spider in which all the building takes place on the tableau and not to separate foundations.
Competitive solitaires Competitive solitaires are games of a solitaire character that are not played solitarily, but by two or more players in competition with each other. The earliest ones go back to the late 19th century. Examples include Conjugal Patience,
cribbage solitaire, Pirate, Progressive Patience,
Racing Demon,
Russian Bank,
Spit and
Spite and Malice. == Computer games ==