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is a widely known form of card solitaire.
Solitaire is any tabletop game which one can play by oneself. In the US, it refers to a card game played by oneself; In the UK the term Patience refers to solitaire with cards. The term "solitaire" is also used for single-player games of concentration and skill using a set layout of tiles, pegs or stones rather than cards. These games include Peg solitaire and Mahjong solitaire. Most solitaire games function as a puzzle which, due to a different starting position, may (or may not) be solved in a different fashion each time.
Types of Solitaire Games 
- Patience, also known as "solitaire with cards". It generally involves placing cards in a layout, and sorting them according to specific rules. A common variant is Klondike, which is included with the Windows operating system under the title Solitaire.
- Mahjong solitaire
- Peg solitaire (more of a puzzle than a game, since, once it is solved, it is repeatable)
- Concentration also known as Memory, Pelmanism, Shinkei-suijaku, Pexeso or simply Pairs, a card game in which all of the cards are laid face down on a surface and two cards are flipped face up over each turn. The object of the game is to turn over pairs of matching cards.