A classic thinking game, Peg Solitaire is a board game for solo players where you have to move pegs strategically on a cross-shaped board with 33 holes. Some boards use marbles that sit in shallow indentations. In the United Kingdom, this game is known as Solitaire, and the card games are called Patience. The game has five levels with 41 stages to allow players to learn the game-play techniques step by step.