Solitaire is the name of many card games that are played by one person. Solitaire is usually played with a standard deck of 52 playing cards. The games are also called patience. In the most popular kind of solitaire, known as Klondike solitaire, the player deals seven cards in a horizontal row, the first one faceup, and the rest facedown. Then the player deals a card faceup on the second card, and a card facedown on each of the remaining five cards. The deal continues until all seven piles have a card facing up. The row of seven piles is called the tableau.